Sorensen DLM 600W Series Power Supplies

Sorensen DLM 600W Series Power Supplies
DLM 600W Series
Power Supplies
Operation Manual
This manual covers models:
DLM 5–75
DLM 8–75
DLM 10–60
DLM 20–30
DLM 40–15
DLM 60–10
DLM 80–7.5
DLM 150–4
DLM 300–2
M362161-01 Rev J
www.programmablepower.com
About AMETEK
AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design
and manufacture of precision, programmable power supplies for R&D, test and measurement,
process control, power bus simulation and power conditioning applications across diverse
industrial segments. From bench top supplies to rack-mounted industrial power subsystems,
AMETEK Programmable Power is the proud manufacturer of Elgar, Sorensen, California
Instruments and Power Ten brand power supplies.
AMETEK, Inc. is a leading global manufacturer of electronic instruments and electromechanical
devices with annualized sales of $2.5 billion. The Company has over 11,000 colleagues working
at more than 80 manufacturing facilities and more than 80 sales and service centers in the United
States and around the world.
Trademarks
AMETEK is a registered trademark of AMETEK, Inc.
Other trademarks, registered trademarks, and product names are the property of their respective
owners and are used herein for identification purposes only.
Notice of Copyright
DLM 600W Series Power Supplies Operation Manual © August 2008 AMETEK Programmable
Power, Inc. All rights reserved.
Exclusion for Documentation
UNLESS SPECIFICALLY AGREED TO IN WRITING, AMETEK PROGRAMMABLE POWER, INC.
(“AMETEK”):
(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY
TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER
DOCUMENTATION.
(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR
EXPENSES, WHETHER SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL,
WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH
INFORMATION WILL BE ENTIRELY AT THE USER’S RISK, AND
(c) REMINDS YOU THAT IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN ENGLISH,
ALTHOUGH STEPS HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF THE
TRANSLATION, THE ACCURACY CANNOT BE GUARANTEED. APPROVED AMETEK CONTENT
IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION, WHICH IS POSTED AT
WWW.PROGRAMMABLEPOWER.COM.
Date and Revision
June 2010 Revision J
Part Number
M362161-01
Contact Information
Telephone:
Fax:
Email:
Web:
800 733 5427 (toll free in North America)
858 450 0085 (direct)
858 458 0267
sales@programmablepower.com
service@programmablepower.com
www.programmablepower.com
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Important Safety Instructions
Before applying power to the system, verify that your product is configured properly for your
particular application.
Hazardous voltages may be present when covers are removed. Qualified
personnel must use extreme caution when servicing this equipment.
Circuit boards, test points, and output voltages also may be floating above
WARNING (below) chassis ground.
The equipment used contains ESD sensitive ports. When installing
equipment, follow ESD Safety Procedures. Electrostatic discharges might
cause damage to the equipment.
WARNING
Only qualified personnel who deal with attendant hazards in power supplies, are allowed to perform
installation and servicing.
Ensure that the AC power line ground is connected properly to the Power Rack input connector or
chassis. Similarly, other power ground lines including those to application and maintenance
equipment must be grounded properly for both personnel and equipment safety.
Always ensure that facility AC input power is de-energized prior to connecting or disconnecting any
cable.
In normal operation, the operator does not have access to hazardous voltages within the chassis.
However, depending on the user’s application configuration, HIGH VOLTAGES HAZARDOUS TO
HUMAN SAFETY may be normally generated on the output terminals. The customer/user must
ensure that the output power lines are labeled properly as to the safety hazards and that any
inadvertent contact with hazardous voltages is eliminated.
Guard against risks of electrical shock during open cover checks by not touching any portion of the
electrical circuits. Even when power is off, capacitors may retain an electrical charge. Use safety
glasses during open cover checks to avoid personal injury by any sudden component failure.
Neither AMETEK Programmable Power Inc., San Diego, California, USA, nor any of the subsidiary
sales organizations can accept any responsibility for personnel, material or inconsequential injury,
loss or damage that results from improper use of the equipment and accessories.
SAFETY SYMBOLS
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Product Family: DLM 600W Series Power Supplies
Warranty Period: Five (5) Years
WARRANTY TERMS
AMETEK Programmable Power, Inc. (“AMETEK”), provides this written warranty covering the
Product stated above, and if the Buyer discovers and notifies AMETEK in writing of any defect in
material or workmanship within the applicable warranty period stated above, then AMETEK may,
at its option: repair or replace the Product; or issue a credit note for the defective Product; or
provide the Buyer with replacement parts for the Product.
The Buyer will, at its expense, return the defective Product or parts thereof to AMETEK in
accordance with the return procedure specified below. AMETEK will, at its expense, deliver the
repaired or replaced Product or parts to the Buyer. Any warranty of AMETEK will not apply if the
Buyer is in default under the Purchase Order Agreement or where the Product or any part
thereof:
is damaged by misuse, accident, negligence or failure to maintain the same as
specified or required by AMETEK;
is damaged by modifications, alterations or attachments thereto which are not
authorized by AMETEK;
is installed or operated contrary to the instructions of AMETEK;
is opened, modified or disassembled in any way without AMETEK’s consent; or
is used in combination with items, articles or materials not authorized by AMETEK.
The Buyer may not assert any claim that the Products are not in conformity with any warranty
until the Buyer has made all payments to AMETEK provided for in the Purchase Order Agreement.
PRODUCT RETURN PROCEDURE
1. Request a Return Material Authorization (RMA) number from the repair facility (must be
done in the country in which it was purchased):
In the USA, contact the AMETEK Repair Department prior to the return of the
product to AMETEK for repair:
Telephone:
800-733-5427, ext. 2295 or ext. 2463 (toll free North America)
858-450-0085, ext. 2295 or ext. 2463 (direct)
Outside the United States, contact the nearest Authorized Service Center
(ASC). A full listing can be found either through your local distributor or our
website, www.programmablepower.com, by clicking Support and going to the
Service Centers tab.
2. When requesting an RMA, have the following information ready:
Model number
Serial number
Description of the problem
NOTE: Unauthorized returns will not be accepted and will be returned at the shipper’s expense.
NOTE: A returned product found upon inspection by AMETEK, to be in specification is subject to
an evaluation fee and applicable freight charges.
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CONTENTS
SECTION 1 GENERAL DESCRIPTION .................................................................... 1-1
1.1
1.2
1.3
1.4
Introduction ........................................................................................... 1-1
General Description .............................................................................. 1-1
Features................................................................................................ 1-2
Specifications ........................................................................................ 1-3
1.4.1 DLM Series Product Matrix ........................................................ 1-3
1.4.2 Electrical Specifications ............................................................. 1-4
1.4.3 General Characteristics ............................................................ 1-5
1.4.4 Remote Analog Interface Characteristics ................................. 1-6
1.4.5 Mechanical Characteristics ....................................................... 1-7
1.4.6 Input/Output Terminations ........................................................ 1-7
1.4.7 Regulatory Agency Compliance ................................................ 1-8
SECTION 2 INSTALLATION .................................................................................... 2-1
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
Introduction ........................................................................................... 2-1
Initial Inspection .................................................................................... 2-1
Location Considerations ....................................................................... 2-1
Installation/Dimensional Drawing ......................................................... 2-2
Rack Mounting...................................................................................... 2-3
2.5.1 Rack Mount Installation of a Single DLM Series 600W Unit ..... 2-4
2.5.2 Rack Mount Installation of Two DLM Series 600W Units ......... 2-6
Input Power Requirements ................................................................... 2-8
AC Line Fuses ...................................................................................... 2-8
AC Input Disconnect Device ................................................................. 2-8
Load Connections ................................................................................ 2-8
2.9.1 Wire Current Carrying Capacity ................................................. 2-9
2.9.2 Wire Voltage Drop ................................................................... 2-10
2.9.3 Noise and Impedance Effects ................................................. 2-11
Load Voltage Sensing ........................................................................ 2-11
2.10.1 Local Sensing ........................................................................ 2-11
M362161-01 Rev J
vii
DLM 600W Series
2.11
2.12
2.13
2.14
2.10.2 Remote Sensing..................................................................... 2-12
2.10.3 Remote Sense (REM SNS) Connector Pinout ....................... 2-13
Load Connection Configurations ......................................................... 2-13
2.11.1 Connecting Single Loads ....................................................... 2-13
2.11.2 Connecting Multiple Loads ..................................................... 2-15
Parallel Operation ............................................................................... 2-17
2.12.1 Parallel I/O Connector Pinout ................................................. 2-19
2.12.2 Parallel I/O Interface Functions .............................................. 2-19
Series Operation.................................................................................. 2-20
Special Application Warning ............................................................... 2-22
2.14.1 Suggested Procedure for Diode Selection ............................. 2-22
SECTION 3 OPERATION ......................................................................................... 3-1
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
Introduction ........................................................................................... 3-1
Controls and Indicators ......................................................................... 3-1
Initial Functional Tests .......................................................................... 3-4
3.3.1 Power–On Check ....................................................................... 3-4
3.3.2 Constant–Voltage Mode Operation Check ................................ 3-5
3.3.3 Constant–Current Mode Operation Check ................................ 3-5
Mode of Operation Setup ...................................................................... 3-6
3.4.1 Constant–Voltage Mode of Operation ....................................... 3-6
3.4.2 Constant–Current Mode of Operation ....................................... 3-7
3.4.3 Adjustment of Constant–Voltage Operation .............................. 3-7
3.4.4 Adjustment of Constant–Current Operation .............................. 3-7
OVP Operation ...................................................................................... 3-8
3.5.1 Adjustment of OVP Threshold ................................................... 3-8
3.5.2 Resetting OVP ........................................................................... 3-9
Front Panel Switches ............................................................................ 3-9
3.6.1 POWER Switch .......................................................................... 3-9
3.6.2 OUTPUT Switch ......................................................................... 3-9
3.6.3 V/I and OVP PREVIEW Switches............................................. 3-10
3.6.4 LOCAL/REMOTE Switch ......................................................... 3-10
Reverse Polarity Protection ................................................................. 3-10
Battery Charging ................................................................................. 3-11
SECTION 4 ADVANCED OPERATION ..................................................................... 4-1
4.1
4.2
viii
Introduction ........................................................................................... 4-1
SETUP Switch ...................................................................................... 4-1
4.2.1 SETUP Switch Functions .......................................................... 4-2
M362161-01 Rev J
DLM 600W Series
4.3
4.4
4.5
4.6
4.7
REMOTE ANALOG INTERFACE ......................................................... 4-3
4.3.1 REMOTE ANALOG INTERFACE Connector ............................ 4-3
4.3.2 REMOTE ANALOG INTERFACE Functions .............................. 4-4
Remote Programming .......................................................................... 4-6
4.4.1 Voltage–Source Programming of Output Voltage ..................... 4-8
4.4.2 Voltage–Source Programming of Output Current ..................... 4-9
4.4.3 Voltage–Source Programming of OVP ................................... 4-10
4.4.4 Resistance Programming of Output Voltage ........................... 4-11
4.4.5 Resistance Programming of Output Current ........................... 4-12
4.4.6 Resistance Programming of OVP ........................................... 4-13
EXTERNAL–OFF Control ................................................................... 4-14
4.5.1 EXTERNAL–OFF with Voltage Source ................................... 4-14
4.5.2 EXTERNAL–OFF with AUXILIARY 5 VDC OUTPUT.............. 4-15
Remote Monitoring ............................................................................. 4-15
Remote Digital Status Signals ............................................................ 4-16
SECTION 5 MAINTENANCE .................................................................................... 5-1
5.1
5.2
5.3
5.4
5.5
Introduction ........................................................................................... 5-1
Troubleshooting .................................................................................... 5-1
Fuse Ratings ......................................................................................... 5-3
Cleaning ............................................................................................... 5-3
Calibration ............................................................................................. 5-3
5.5.1 Internal Reference Adjustment ................................................. 5-5
5.5.2 Output Voltage Offset Adjustment ............................................ 5-5
5.5.3 Output Voltage Range Adjustment ........................................... 5-5
5.5.4 Output Current Offset Adjustment ............................................ 5-6
5.5.5 Output Current Range Adjustment ............................................ 5-6
5.5.6 Voltage Display Adjustment ...................................................... 5-7
5.5.7 Current Display Adjustment ...................................................... 5-7
M362161-01 Rev J
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DLM 600W Series
LIST OF FIGURES
Figure 2-1. DLM 600W Series Outline Drawing ................................................ 2-2
Figure 2-2. Rackmount Kit (Single Unit Option) ................................................ 2-5
Figure 2-3. Rackmount Kit (Dual Unit Option) .................................................. 2-7
Figure 2-4. Remote Sense Connector ............................................................ 2-12
Figure 2-5. Single Load Connection with Local Sensing .................................. 2-14
Figure 2-6. Single Load Connection with Remote Sensing ............................ 2-14
Figure 2-7. Multiple Load Connection with Local Sensing ................................ 2-15
Figure 2-8. Distribution Bus Connection with Remote Sensing ...................... 2-16
Figure 2-9. Parallel Connection of Units with Remote Sensing ........................ 2-17
Figure 2-10. Parallel I/O Connector ................................................................. 2-18
Figure 2-11. Series Connection of Units with Local Sensing ........................... 2-20
Figure 2-12. Series Connection of Units with Remote Sensing ...................... 2-21
Figure 2-13. Diode Selection .......................................................................... 2-22
Figure 3-1. Front and Rear Panel Views ........................................................... 3-2
Figure 3-2. CV and CC Modes of Operation ..................................................... 3-6
Figure 4-1. SETUP Switch ................................................................................ 4-1
Figure 4-2. Remote Analog Interface Connector .............................................. 4-3
Figure 4-3. Voltage–Source Programming of Output Voltage .......................... 4-8
Figure 4-4. Voltage–Source Programming of Output Current ........................... 4-9
Figure 4-5. Voltage–Source Programming of OVP ......................................... 4-10
Figure 4-6. Resistance Programming of Output Voltage ................................ 4-11
Figure 4-7. Resistance Programming of Output Current ................................ 4-12
Figure 4-8. Resistance Programming of OVP ................................................. 4-13
Figure 4-9. EXTERNAL–OFF with Voltage Source......................................... 4-14
Figure 4-10. EXTERNAL–OFF with AUXILIARY 5 VDC OUTPUT................... 4-15
Figure 5-1. Main PWA Location of Test Points and Potentiometers ................. 5-4
Figure 5-2. Display PWA Location of Potentiometers ....................................... 5-4
LIST OF TABLES
Table 1–1.
Table 2–1.
Table 2–2.
Table 2–3.
Table 2–4.
Table 4–1.
Table 4–2.
Table 4–3.
Table 4–4.
Table 4–5.
Table 5–1.
Table 5–2.
x
DLM Series Specifications .............................................................. 1-4
DLM 600W Rackmount Kit Parts List ............................................. 2-3
Wire Data ...................................................................................... 2-10
Remote Sense (REM SNS) Connector Pinout .............................. 2-13
Parallel I/O Connector Pinout ....................................................... 2-19
Setup Switch Functions .................................................................. 4-2
Remote Analog Interface Connector Pinout ................................... 4-3
Remote Programming Options ....................................................... 4-7
Remote Monitoring ....................................................................... 4-15
Remote Digital Status Signals ....................................................... 4-16
Troubleshooting Guide ................................................................... 5-2
Internal Fuses ................................................................................. 5-3
M362161-01 Rev J
SECTION 1
GENERAL DESCRIPTION
1.1
Introduction
The Sorensen DLM Series of 600W power supplies comprise a family of general purpose
programmable supplies for rackmount and benchtop applications. The DLM 600W series
consists of nine models, rated 5V/75A, 8V/75A, 10V/60A, 20V/30A, 40V/15A, 60V/10A,
80V/7.5A, 150V/4A, and 300V/2A.
A variety of user interfaces are available, ranging from manual front–panel control and
standard non–isolated remote analog control, to optional GPIB or isolated remote analog
control.
1.2
General Description
The DLM series power supplies incorporate the latest power conversion and control
technology to provide high accuracy, excellent regulation, low output noise, and fast
transient response. They utilize a switched–mode output power converter for high
efficiency and power density. The converter has been optimized to provide
performance approaching that of linear supplies. A high switching frequency combined
with Zero–Voltage Transition power switching and dual–stage output filtering account
for the excellent dynamic and noise characteristics. Precise regulation of output voltage
or current is possible with operation as either a voltage source in constant–voltage
mode (CV), or as current source in constant–current mode (CC). Crossover between
modes is automatic, dependent on load demand.
The front panel contains all controls and indicators required for setting and monitoring
the output parameters, as well as annunciation of operational status. Individual
adjustment controls are provided for output voltage, current, and over voltage protection
(OVP). Two 3.5 digit LED displays normally measure the output voltage and current. In
conjunction with the preview switches, these displays also show the programmed
values of voltage, current, or OVP. The preview functions allow adjustment of those
parameters without disturbing load connections. LED indicators show the mode of
operation (CV or CC), programming control source, or abnormal operating conditions.
Switches are also provided to directly control the output power, and to switch between
local and remote control.
M362161-01 Rev J
1-1
DLM 600W Series
The outputs are isolated from the chassis GND. However, an internal I0M bleeder
resistor is connected from output return (-) to chassis ground. This allows operation
with floating outputs, or with either the negative or positive terminal of the output
referenced to chassis ground.
Master/slave paralleling is possible to allow multiple units to be operated in parallel for
greater output current or power. The master unit has full control of the other slave units
in setting the output voltage, current, and OVP. Multiple units can be connected in
series for increased output voltage, within the 300V float limitation of the output
terminals.
Remote programming is available with the standard non–isolated analog interface.
Output voltage, current, and OVP are fully controlled with user selectable programming
voltage levels or resistance programming.
Analog output signals are also provided to monitor the output voltage and current. In
addition, a complement of digital input/output signals allows control and monitoring of
the operational state of the supply. Optional interfaces such as GPIB, RS-232, isolated
remote analog, and LXITM Class C Ethernet Interface allow adaptation of the supplies to
a variety of applications.
1.3
Features
High power density, 600W, in a 1U half–rack size
Appropriate for rack or benchtop applications
Fast dynamic response: 500 s, maximum for 50% load steps
Low ripple and noise: as low as 3.5 mV(RMS) and 35 mV(PK-PK)
Universal auto–ranging AC input: 90–132V or 180–264V, without
user setup
Master/slave paralleling with simple unit–to–unit control interface
cable
Flexible rack mounting allowing units to be stacked in 1U
increments without requiring clearance gaps between units
or slides
Side–by–side mounting of two units in a 19" rack
Fast response to programming changes with active
downprogrammer
Constant–voltage and constant–current modes of operation with
automatic crossover and mode indicators
Two 3.5 digit displays for output voltage, current, and OVP
1-2
M362161-01 Rev J
DLM 600W Series
High resolution front panel controls for voltage and current
(10–turn potentiometers), and OVP (20–turn trimmer
potentiometer)
Preview switches for output voltage, current, and OVP to set
parameters without disrupting load connections
Front panel OUTPUT switch for on/off control of output power
Remote sensing to compensate for voltage drop of power leads
User selectable ranges of 0–5 VDC and 0–10 VDC for
programming and monitoring of output voltage and current,
and for programming OVP
SETUP switch for selecting ranges for programming and
monitoring signals
Opto–isolated remote shutdown for control of output power
Front panel LOCAL/REMOTE switch for selecting programming
source
LOCAL–LOCKOUT function to disable front panel control while
in remote operation
Digital I/O for remote control and status annunciation
Configuration changes without requiring removal of covers
Optional GPIB, LXITM Class C Ethernet Interface, RS-232,
and isolated remote analog control
Cooling fan speed control for low noise and extended fan life
1.4
1.4.1
Specifications
DLM Series Product Matrix
Model
DLM 5–75
DLM 8–75
DLM 10–60
DLM 20–30
DLM 40–15
DLM 60–10
DLM 80–7.5
DLM 150–4
DLM 300–2
M362161-01 Rev J
Voltage Range
0–5 VDC
0–8 VDC
0–10 VDC
0–20 VDC
0–40 VDC
0–60 VDC
0–80 VDC
0–150 VDC
0–300 VDC
Current Range
0–75 ADC
0–75 ADC
0–60 ADC
0–30 ADC
0–15 ADC
0–10 ADC
0–7.5 ADC
0–4 ADC
0–2 ADC
Power Rating
375W
600W
600W
600W
600W
600W
600W
600W
600W
1-3
DLM 600W Series
1.4.2
Electrical Specifications
DLM Series Electrical Specifications1
Model
DLM 5-75 DLM 8-75 DLM10-60 DLM20-30 DLM40-15 DLM60-10 DLM80-7.5 DLM150-4 DLM300-2
Output Rating:
Output Voltage
Output Current
Output Power
0-5VDC 0-8VDC 0-10VDC 0-20VDC 0-40VDC 0-60VDC 0-80VDC 0-150VDC 0-300VDC
0-75ADC 0-75ADC 0-60ADC 0-30ADC 0-15ADC 0-10ADC 0-7.5ADC 0-4ADC 0-2ADC
375W
600W
600W
600W
600W
600W
600W
600W
600W
Line Regulation2:
Voltage (0.005% of Vmax + 2mV)
Current (0.01% of Imax + 2mA)
2.4 mV
9.5 mA
2.4 mV
9.5 mA
2.5 mV
8 mA
3 mV
5 mA
4 mV
3.5 mA
5 mV
3 mA
6 mV
2.8 mA
9.5 mV
2.2 mA
17 mV
2.1 mA
Load Regulation3:
Voltage (0.005% of Vmax + 2mV)
Current (0.02% of Imax + 5mA)
2.4 mV
20 mA
2.4 mV
20 mA
2.5 mV
17 mA
3 mV
11 mA
4 mV
8 mA
5 mV
7 mA
6 mV
6.5 mA
9.5 mV
5.8 mA
17 mV
5.4 mA
Remote Voltage-Programming Accuracy
Voltage (0.25% of Vmax)
20 mV
Current (.5% of Imax)
375 mA
55 mV
OVP (1.0% of 1.1 Vmax)
20 mV
375 mA
88 mV
25 mV
300 mA
110 mV
50 mV
150 mA
220 mV
100 mV
75 mA
440 mV
150 mV
50 mA
660 mV
200 mV
38 mA
880 mV
375 mV
20 mA
1.65V
750 mV
20 mA
3.3V
Display Accuracy:
Voltage (0.5% of Vmax + 1 count)
Current (1.0% of Imax + 1 count)
35 mV
850 mA
50 mV
850 mA
60 mV
700 mA
200 mV
400 mA
300 mV
160 mA
400 mV
110 mA
500 mV
85 mA
850 mV
50 mA
2.5V
30 mA
Preview Accuracy:
Voltage (1.0% of Vmax + 1 count)
Current (1.5% of Imax + 1 count)
OVP(1.0% of 1.1 Vmax+1 count)
60 mV
1.23A
65 mV
90 mV
1.23A
98 mV
100 mV
1.0 mA
120 mV
300 mV
550 mA
320 mV
500 mV
235 mA
540 mV
700 mV
160 mA
760 mV
900 mV
120 mA
980 mV
1.6V
70 mA
1.75V
4V
40 mA
4.3V
Ripple and Noise, Voltage-Mode:
RMS (20 Hz-20 MHz)
P-P (20 Hz-20 MHz)
5 mV
30 mV
5 mV
30 mV
5 mV
30 mV
2.5 mV
15 mV
2.5 mV
15 mV
2.5 mV
20 mV
4 mV
20 mV
7 mV
40 mV
10 mV
60 mV
OVP Adjustment Range:
5% to 110% of Vmax
0.25-5.5V 0.4-8.8V
0.5-11V
1-22V
2-44V
3-66V
4-88V
7.5-165V 15-330V
5 mV
30 mA
10 mV
15 mA
20 mV
7.5 mA
30 mV
5 mA
40 mV
3.75 mA
75 mV
2 mA
DLM Series Supplemental Characteristics
Stability4:
Voltage (0.05% of Vmax)
Current (0.05% of Imax)
2.5 mV
37.5 mA
Temperature Coefficient5:
Voltage (0.02%/ C of Vmax)
Current (0.03%/ C of Imax)
1 mV/ C 1.6 mV/ C 2 mV/ C 4 mV/ C 8 mV/ C 12 mV/ C 16 mV/ C 30 mV/ C 60 mV/ C
22.5mA/ C 22.5mA/ C 18 mA/ C 9 mA/ C 4.5 mA/ C 3 mA/ C 2.25mA/ C 2 mA/ C 0.6mA/ C
Maximum Total Line Drop
with Remote Sensing6
1V
4 mV
37.5 mA
1V
1V
2V
2V
2V
2V
2V
150 mV
1 mA
2V
Notes: 1 Warranted over a temperature range of 0–50 C, with remote sensing at output terminals.
2 AC input voltage variation within the allowed range, with constant load and temperature.
3 For 0–100% load variation, with constant nominal AC input voltage and temperature.
4 Maximum drift over 8 hours with constant line, load, temperature, after 30 min. warm–up.
5 Change in output per C change in ambient temperature, with constant line and load.
6 Line drop subtracts from the maximum available output voltage at full rated power.
Table 1–1. DLM Series Specifications
1-4
M362161-01 Rev J
DLM 600W Series
1.4.3
General Characteristics
AC Input Voltage Range: 90–132 VAC or 180–264 VAC; auto–ranging, no user setup
required; single–phase, 2–wire plus ground
AC Input Frequency Range: 47–63 Hz
AC Input Current: 11A, maximum at 115 VAC; 6A, maximum at 230 VAC
AC Input Power Factor: 0.6, typical at full load; dependent on the impedance of the
AC input
AC Input Protection: internal fuses provided in each line of AC input for fault isolation
Operating Temperature Range: 0 C to 50 C
Storage Temperature Range: –40 C to 65 C
Humidity: 90%, maximum non–condensing
Altitude: 2,000m (6,562 ft)
Transient Response: The output voltage will recover within 500 s to the steady–state
voltage level (within 0.1% of full scale) for a 50–100% or 100–50% load step change.
Efficiency: 84%, typical; 82%, typical for DLM 8–75; 75%, typical for DLM 5–75
Float Voltage: 300V(PK), maximum float voltage of either output terminal to chassis
ground
Display Type: 7–segment LED, 3.5 digits for voltage, current, and OVP
Front Panel Adjustment Controls: Voltage and current controls are 10–turn precision
potentiometers. OVP control is 20–turn trimmer potentiometer.
Overvoltage Protection (OVP): If the load voltage, at the point of sensing, exceeds
the OVP programmed value, the output converter will be shut down, and the output
capacitors will be discharged with the downprogrammer. A secondary OVP monitor
senses the voltage at the rear panel output terminals to protect against open sense
leads. The unit can be restarted by cycling the AC POWER switch off and back on,
cycling the OUTPUT switch, or by momentarily activating the remote shutdown.
M362161-01 Rev J
1-5
DLM 600W Series
Fault Shutdown: Supervisory circuits monitor for abnormal operation of internal
circuits: overtemperature, logic supply fault, paralleling interface connection fault,
cooling fan fault, output converter driver fault, output converter overcurrent fault. A fault
condition will result in shutdown of the output converter, and the output capacitors will
be discharged with the downprogrammer. The unit can be restarted by cycling the AC
POWER switch off and back on, cycling the OUTPUT switch, or by momentarily
activating the remote shutdown.
Parallel Operation: Up to four units of the same model can be connected in parallel.
A master/slave paralleling interface is used for forced current sharing between the units.
The master unit has programming control of the output voltage, current, or OVP. The
current display of each unit shows its contribution to the total load current. The voltage
display of the master unit shows the load voltage, while the voltage displays of the slave
units are blanked out. A fault condition occurring within a unit will result in shutdown of
all units. A paralleling interface cable is used to route control signals between the units.
Series Operation: Multiple units can be connected in series, limited by the 300V(PK),
maximum float voltage of the output terminals of each unit to chassis ground. The
output of each unit is set individually, and each unit displays its own output voltage and
current.
1.4.4
Remote Analog Interface Characteristics
Remote Voltage Programming: The output voltage, current and OVP can be
programmed from zero to full scale with an external voltage source with a user–
selectable range of either 0–5 VDC or 0–10 VDC. The analog programming circuitry is
not isolated from the output negative (return) terminal.
Remote Resistance Programming: The output voltage, current and OVP can be
programmed from zero to full scale with an external resistance of 0–5 k . The analog
programming circuitry is not isolated from the output negative (return) terminal.
Remote Resistance Programming Accuracy: Output Voltage = 1.5% of Vmax
Output Current = 2.5% of Imax
OVP = 2.0% of 1.1 Vmax
Remote Monitors: Monitors for the output voltage and current provide a proportional
analog signal with user selectable ranges of 0–5 VDC or 0–10 VDC, corresponding to
zero to full scale of the output parameter.
Monitor Accuracy: Voltage Monitor, 5V Range = 0.5% of Vmax
Voltage Monitor, 10V Range = 0.75% of Vmax
Current Monitor, 5/10V Ranges = 1.0% of Imax
1-6
M362161-01 Rev J
DLM 600W Series
Digital Input Signals: Digital input control signals are provided for the following
functions: LOCAL–LOCKOUT and ANALOG–CONTROL. The signals are active–low,
with a logic–low output signal level of 0.8 VDC. The signals are not isolated from the
negative output (return) terminal of the unit.
Digital Output Signals: Digital output control signals are provided for the following
functions: VOLTAGE–MODE, REMOTE–CONTROL, OVP, and FAULT. The signals
are active–high, with a nominal 5 VDC output and a 750 source resistance. The
signals are not isolated from the negative output (return) terminal of the unit.
EXTERNAL–OFF Interface: An input signal within the voltage range of 2–30 VDC
turns off the output by disabling the output converter. The signal is opto–isolated from
the other signals of the remote analog interface and from the output terminals of the
unit. The maximum voltage between either EXTERNAL–OFF terminal and the other
terminals of the REMOTE ANALOG INTERFACE is 60V(PK).
1.4.5
Mechanical Characteristics
Dimensions: 8.5 in (216 mm) W x 1.75 in (44.5 mm) H x 17 in (432 mm) D,
excluding protrusion of rear panel connectors, bus bars, or terminal block.
Maximum depth, including bus bar or terminal block cover, is 18.12 in (460 mm) for
low–voltage models rated 5V–60V, and 17.75 in (451 mm) for high–voltage models
rated 80V–300V.
Bus bar and terminal block covers are removable from the rear panel.
Net Weight: 9.7 lbs (4.4 kg)
Shipping Weight: 12.7 lbs (5.8 kg)
Cooling: Forced convection cooling with internal fan. Fan speed is variable as a
function of ambient temperature and load to extend the fan's life and reduce ambient
noise. Air intake is at the front and sides of the chassis, while the exhaust is at the rear
and sides of the chassis
1.4.6
Input/Output Terminations
Output Terminations: Bus bars with #10-32 screws for low–voltage models rated
5V–60V; terminal block with #6-32 screws for high–voltage models rated 80V–300V
AC Input Connector: IEC 320 male connector
AC Input Line Cord: 1.83M (6ft), nominal with IEC 320 female connector; the line cord
plug is as required by destination country.
Ground Stud: A #6-32 stud is provided on the rear panel for terminations to chassis
ground.
M362161-01 Rev J
1-7
DLM 600W Series
Remote Analog Interface Connector: 25–position female subminiature–D connector.
Remote Sense Connector: Two–position connector, Molex #39-30-0023.
Paralleling Interface Connector: Two six–position connectors, Molex #43045-0602,
for use with the Paralleling Cable, Sorensen part number DLMP1.
1.4.7
Regulatory Agency Compliance
Units will comply with the requirements of the European Low Voltage Directive
(IEC 61010-1:90+A1:92+A2:95) and EMC Directive (EN 61326:1998) as required for
the CE mark.
Electrostatic Discharge: IEC 61000-4-2
Radiated RF Immunity: IEC 61000-4-3
Fast–Transients: IEC 61000-4-4
Surge: IEC 1000-4-5
Conducted RF Immunity: IEC 1000-4-6
Input Voltage Interruptions: IEC 1000-4-11
Conducted Emissions: CISPR 16-1/2
Radiated Emissions: CISPR 16-1/2
LVD Categories: Installation Category II; Pollution Degree 2; Class II Equipment;
For Indoor Use Only
1-8
M362161-01 Rev J
SECTION 2
INSTALLATION
2.1
Introduction
The DLM Series power supply has been fully calibrated and tested prior to shipment;
the unit is ready for immediate use upon receipt. However, when first unpacked, the
unit should be inspected to ensure that no shipping damage has occurred.
2.2
Initial Inspection
Perform a visual inspection of the shipping container prior to accepting the package
from the carrier. If damage to the shipping container is evident, a description of that
damage should be noted on the carrier's receipt and signed by the carrier's driver.
Perform a visual inspection of the unit after it is removed from the shipping container.
Check for shipping damage such as dents, scratches, distortion of the enclosure, or
damaged controls. If external damage is evident, there may be internal damage as
well. Immediately contact the carrier and file a claim for concealed damage. In
addition, the shipping container and filler material should be saved for inspection.
Forward a report of the damage to the Service Department where a customer service
representative will provide instructions for repair or replacement of the unit.
2.3
Location Considerations
The power supplies are designed for rackmount and benchtop applications. As
shipped, the supplies are configured for benchtop use. Conversion for rack mounting,
simply requires removal of the four feet from the bottom of the chassis and adding the
rackmount kit.
Since the units are fan–cooled, they require adequate clearance at the air intake and
exhaust so that air flow is not impeded. The air intake is at the front and front sides,
while the air exhaust is at the rear panel and rear sides. The temperature of the
ambient air at the air intake should not exceed 50°C.
M362161-01 Rev J
2-1
DLM 600W Series
2.4
Installation/Dimensional Drawing
Refer to Figure 2-1 for dimensional and mounting information.
Figure 2-1. DLM 600W Series Outline Drawing
2-2
M362161-01 Rev J
DLM 600W Series
2.5
Rack Mounting
A rackmount kit, Sorensen part number DLMRK, is an option that allows mounting
either one unit (see Section 2.5.1) or two units side–by–side (see Section 2.5.2) in a
standard 19" rack. The chassis is designed to permit units to be stacked one on top of
the other without requiring clearance gaps between the units, or the use of slides.
Stacking does not restrict airflow since the top or bottom is not utilized for air intake or
exhaust. Clearance slots in the chassis accept angle brackets for supporting the units in
the rack without increasing the 1U (1.75") height of the chassis.
CAUTION
Four screws (two on each side), #6-32, at the front sides of the
chassis are used for rackmounting. Damage could result if the
penetration of screws into the chassis exceeds 0.25" (6.35 mm).
PART NO.
DESCRIPTION
ITEM NO. QUANTITY
9361764-01
PANEL, RACK, MNT, SGL UNIT DLM600
1
1
9361455-01
BRACKET, CHASSIS EAR MOUNT
2
2
9361912-01
BRACKET, RACK MOUNT-DLM600W
3
2
9361456-01
BAR, CHASSIS TIE MOUNT
4
1
9361916-01
BRACKET, ADPTER, RK MT-DLM600W
5
2
110DS04-04
SCREW, 6-32X, 250, SEMS, PPH, CS
6
2
112GL04-01
NUT, 10-32, W/WASHER, KEP, CS
8
4
110GS04-08
SCREW, 10-32X.500, SEMS, PPH, CS
9
8
110-032-01
SCREW, 10-32X.500, BLACK 27038
10
4
110DG20-05
SCREW, 6-32X.312, PHF, 100D, SS
11
6
Table 2–1. DLM 600W Rackmount Kit Parts List
M362161-01 Rev J
2-3
DLM 600W Series
2.5.1
Rack Mount Installation of a Single DLM Series 600W Unit
Follow the procedure below to install a single Sorensen DLM 600W Series power
supply in a rack using the Rack Mount Kit, Sorensen part number DLMRK.
Refer to Figure 2-2.
1.
Remove the four (4) rubber feet and mounting hardware from the bottom of the
unit and discard.
2.
Remove the four (4) truss head screws (two on each side) from the front side
panels of the unit. (Do not discard.)
3.
When rack mounting a unit, it can be mounted on the right or left hand side of
the rack.
4.
Install Rack Mount Extruded Ear on the front side of unit using the two (2)
existing truss head screws.
5.
Install Single–Unit Rack Mount Bracket on opposite side from Rack Mount
Extruded Ear using the two (2) panhead SEMS screws, 6-32UNC-2A x .25”
supplied in the kit.
6.
Install Rack Mount Extruded Ear on end of Single–Unit Rack Mount Bracket
using the two (2) existing truss head screws.
7.
Position one of the two Chassis Rack Mount Brackets on the chassis side of the
rack, using one of the two (2) Right Angle Adapter Brackets, if required to match
existing vertical rack rail positions.
CAUTION
To prevent internal damage, use the specified screw lengths only.
Use caution when installing unit, the unit will not stay on Chassis
Rack Mount Bracket until at least one of the four (4) front panel
mounting screws is installed. See Figure 2-2.
2-4
M362161-01 Rev J
DLM 600W Series
Figure 2-2. Rackmount Kit (Single Unit Option)
M362161-01 Rev J
2-5
DLM 600W Series
2.5.2
Rack Mount Installation of Two DLM Series 600W Units
Follow the procedure below to install two (2) Sorensen DLM 600W Series power
supplies in a rack using the Rack Mount Kit, Sorensen part number DLMRK .
Refer to Figure 2-3.
1.
Remove the four (4) rubber feet and mounting hardware from the bottom of the
unit and discard.
2.
Remove the four (4) truss head screws (two on each side) from the front side
panels on both units. (Do not discard.)
3.
Install the Tie Bar onto the bottom of the two (2) inner heat sinks using the six (6)
Philips flat head screws, 6-32UNC-2A X .31” supplied in the kit.
4.
Install Rack Mount Extruded Ears on front sides of unit using existing four (4)
truss head screws.
5.
Position the two Chassis Rack Mount Brackets in the rack, use the two (2) Right
Angle Adapter Brackets, if required to match existing vertical rack rail positions.
CAUTION
To prevent internal damage, use the specified screw lengths only.
2-6
M362161-01 Rev J
DLM 600W Series
Figure 2-3. Rackmount Kit (Dual Unit Option)
M362161-01 Rev J
2-7
DLM 600W Series
2.6
Input Power Requirements
The unit will operate from an AC power source rated at 90–132 VAC and 180–264
VAC, at 47–63 Hz. The AC input voltage range is automatically selected by the unit at
power–up; no user setup is required.
CAUTION
Exceeding the maximum rated AC input voltage could result in
damage to the unit.
An IEC connector is provided on the rear panel for connecting the unit to the AC
power source with a power cord; the IEC connector also provides the safety ground
termination. The power cord supplied with the unit has a safety ground wire that
connects the enclosure of the unit to the safety ground of the AC power source. This
connection is automatically made when the power cord is plugged into an appropriate
AC receptacle.
WARNING
Operating the unit with the safety ground wire of the power cord
disconnected could result in a shock hazard.
2.7
AC Line Fuses
Fuses are provided for both lines of the AC input, and are located internal to the
enclosure on the main circuit board near the AC input connector. They have time–
delay characteristics, and are rated at 20A/250VAC. The fuses are sized to provide
fault isolation, and should not require replacement during normal operation. If the fuses
open, replacement should be done by qualified personnel to determine whether a fault
condition exists. Refer to Table 5–2 for fuse ratings.
WARNING
To prevent electrical shock, disconnect the AC power cord before
checking the internal fuses. Operating with fuses of improper rating
could result in a fire hazard.
2.8
AC Input Disconnect Device
The front panel POWER switch does not disconnect the AC input line from the unit.
Ensure that access is provided to the rear panel IEC AC input connector or the plug of
the line cord. For rack mount applications, ensure that a suitable disconnecting device
is incorporated that will provide isolation from the AC input source.
2.9
Load Connections
Low–voltage models rated 5V–60V have bus bars at the rear of the unit for connecting
the load; refer to Figure 3-1. The bus bars are protected with a two–piece cover. The
2-8
M362161-01 Rev J
DLM 600W Series
top portion of the cover is removable to allow access to the bus bar screws. In addition,
the top portion has scored sections at the top and back that could be removed to
provide a larger opening for wiring.
Ensure that wires are routed appropriately to prevent shorting, and that the cover is
properly installed before applying AC power to the unit. For applications where the bus
bars are not operator accessible, such as rack mounting, both portions of the cover
could be removed. Ensure that adequate protection from accidental contact is provided
for service personnel that might work on the equipment.
High–voltage models rated 80V–300V have an output terminal block with a snap–on
cover. Ensure that the cover is in place, and that it insulates all connections to the
output terminals before operating the unit.
WARNING
To prevent electrical shock, disconnect the AC power cord before
making any connections to the unit.
CAUTION
If longer bus bar screws are substituted, ensure that a clearance
of at least 0.125” (3.2 mm) exists to the rear panel to prevent an
electrical short.
When connecting the load to the power supply, consider the following factors to select
a suitable wire gauge: the current carrying capacity of the wire (limited by temperature
rise of the wire); the voltage drop across the total length of load lines; noise coupling
and impedance effects of the load lines.
2.9.1
Wire Current Carrying Capacity
Load wiring must have a current carrying capacity greater than the output current rating
of the power supply. This ensures that the wiring will not be damaged even if the load
is shorted.
Table 2–2 shows the current rating, based on 500A/cm 2, for various gauges of wire.
The maximum current that a particular wire can conduct is dependent on multiple
factors: ambient temperature, temperature rating of insulation, wire bundling, and
altitude. The primary constraint is that the temperature rise of the wire resulting from
the current flow, added to the ambient temperature, must not exceed the maximum
operating temperature of the insulation.
M362161-01 Rev J
2-9
DLM 600W Series
AWG
Copper Area,
cm2
Resistance,
/m at 20°C
Resistance,
/m at 100°C
Current Rating,
A at 500A/cm2
6
0.133
0.0013
0.0017
66.5
8
0.0837
0.0021
0.0028
41.9
10
0.0526
0.0033
0.0044
26.3
12
0.0331
0.0052
0.0069
16.6
14
0.0208
0.0083
0.011
10.4
16
0.0131
0.0132
0.0174
6.6
18
0.00823
0.0209
0.0276
4.1
20
0.00518
0.0333
0.044
2.6
22
0.00326
0.053
0.07
1.6
Table 2–2. Wire Data
2.9.2
Wire Voltage Drop
For applications where regulation is important, the contribution of the load wiring to
voltage drop from the power supply output terminals to the load must be considered.
The wire gauge must be selected to maintain an acceptable total voltage drop of the
load wiring under the maximum peak current. The resistance of the load wiring must be
determined for the sum total length of the positive lead and the negative lead.
Table 2–2 gives the resistance per meter (m) of various wire gauges at 20°C and
100°C. Use the following equation to calculate resistance for other wire temperatures:
R = R20°C
Where
[1 + 0.004
(T-20°C)]
R = resistance, /m, at temperature T
R20°C = resistance, /m, at 20°C
T = temperature, °C, of wire
The voltage drop (per positive or negative lead) can be calculated using the following
equation:
V=I
Where
L
R20°C
[1 + 0.004
(T-20°C)]
V = total voltage drop, V
I = load current, A
L = length, m, of load wire
R20°C = resistance, /m, of wire at 20°C
T = temperature, °C, of wire conducting load current
The total voltage drop would be calculated by summing the drops of the positive and
negative leads.
2-10
M362161-01 Rev J
DLM 600W Series
2.9.3
Noise and Impedance Effects
To minimize noise pickup or radiation from load circuits, load wires and remote sense
wires should be twisted–pair with minimum lead length. Shielding of the sense leads
may be necessary in high noise environments. Even if noise is not a concern, the load
and remote sense wires should be twisted–pairs to reduce coupling between them,
which could impact the stability of the power supply. If connectors are utilized for the
power and sense leads, be careful not to introduce coupling between the leads. Ensure
that the connector terminals for the sense leads are in adjacent locations, and minimize
the physical loop area of the untwisted portions. Ideally, the sense leads should be
separated from the power leads and should have their own connector.
Twisting the load wires provides an additional benefit in reducing the parasitic
inductance of the cable. This improves the dynamic response characteristics at the
load by maintaining a low source impedance at high frequencies. Also, with long load
wires, the resultant inductance and resistance could produce high frequency voltage
spikes at the load because of current variations in the load itself. The impedance
introduced between the output of the power supply and the load could make the
ripple/noise at the load worse than the specifications of the power supply (which are
valid when measured at the rear panel bus bars). Additional filtering with bypass
capacitors at the load terminals may be required to bypass the high frequency load
currents.
In addition, when operating with external sense, the recommendation is that it be done
with twisted shielded pair, with one end of the shielding connected to the ground stud
next to the sense connector. The other end does not need to be connected.
2.10
Load Voltage Sensing
Two methods are available for sensing the load voltage: local and remote sensing.
Local sensing measures the voltage internal to the supply at the output terminals.
Remote sensing allows the point of measurement to be relocated to the load.
2.10.1
Local Sensing
Local sensing is the default factory setting, and results in sensing the output voltage
internally at the rear panel output terminals. To select this method of sensing, ensure
that REM SNS of the SETUP switch, Position-1, is set to OFF. Refer to Figure 4-1.
M362161-01 Rev J
2-11
DLM 600W Series
2.10.2
Remote Sensing
Remote sensing is used during voltage–mode operation to compensate for the voltage
drop across the load wires. It is selected by setting REM SNS of the SETUP switch,
Position-1, to ON. Refer to Figure 4-1.
A separate pair of wires is routed to measure the voltage at the load instead of the local
connection at the output terminals. Refer to Figure 2-4 for a view of the connector, and
Table 2–3 for its pinout. Connect the positive and negative terminals of the sense leads
to the respective terminals of the load.
Special care is required in routing the sensing leads to prevent noise pickup or coupling
to the power leads; refer to Section 2.9.3, Noise and Impedance Effects. The sense
leads should be a twisted–pair of at least AWG #22 wire, and may require shielding in
high noise environments. Connect the shield at only one point, as required to maximize
its effectiveness.
If the unit is set for remote sense (i.e., SETUP switch Position-1 is ON), but the sense
wires to the load are not connected, the unit will revert to local sense. This will also
cause the output voltage, at the rear panel output terminals, to increase nominally 5%
above the programmed value.
If remote sensing is enabled, but the sense leads are not connected to the output, the
power supply will shut down due to OVP. Also, if excessive line drop occurs in the load
wires, an OVP shutdown could be generated because of the secondary OVP circuit that
monitors for abnormal voltage at the rear panel output terminals.
Figure 2-4. Remote Sense Connector
2-12
M362161-01 Rev J
DLM 600W Series
2.10.3
Remote Sense (REM SNS) Connector Pinout
The REMOTE SENSE (REM SNS) connector is a 2–position connector,
Molex #39-30-0023. The mating connector is Molex #39-01-3022; and its
terminals are Molex #39-00-0056. The pinout is presented in Table 2–3.
Pin Number
Function
1
Negative (–) Sense
2
Positive (+) Sense
Table 2–3. Remote Sense (REM SNS) Connector Pinout
2.11
Load Connection Configurations
The output of the DLM Series power supplies is isolated (see Note) from chassis
ground, allowing either positive, negative, or floating outputs with respect to chassis
ground. Connections to the load are made at the rear panel output terminals. Ensure
that a wire gauge is utilized that can carry the programmed current without overheating.
Either local or remote sensing of the output voltage is selectable, depending upon the
desired point of voltage regulation.
(Note: There is a I0M
chassis ground).
resistor network connected from the output return(-) to the
WARNING
The REMOTE ANALOG INTERFACE, REMOTE SENSE, and
PARALLEL I/O signals are connected to the negative (return) output
terminal. If the negative (return) output terminal is floated with respect
to chassis ground, those signals will also float at the same potential.
Use appropriate safety measures to prevent a shock hazard.
CAUTION
Operating the power supply with either the positive or negative
output lead floated greater than 300 VPK above chassis ground
could result in damage to the unit.
2.11.1
Connecting Single Loads
Single loads are connected directly to the rear panel output terminals. Twist the load
wires or maintain them closely in parallel for their entire length. Use the heaviest gauge
practical to minimize line drop. Figure 2-5 and Figure 2-6 show single load connections
with local and remote sensing, respectively.
M362161-01 Rev J
2-13
DLM 600W Series
Figure 2-5. Single Load Connection with Local Sensing
*SETUP Switch Position-1, REM SNS, Set to ON
Figure 2-6. Single Load Connection with Remote Sensing
2-14
M362161-01 Rev J
DLM 600W Series
2.11.2
Connecting Multiple Loads
When output voltage regulation is critical and multiple loads are connected to the power
supply, it is important to connect each load independently to the terminals where the
output voltage is sensed. Independent leads to each load will ensure that the load
currents do not produce voltage drops in the connecting leads that could be mutually
coupled between the loads. Figure 2-7 shows two loads connected to the power
supply, with local sensing.
Figure 2-7. Multiple Load Connection with Local Sensing
If a distribution bus is utilized for multiple loads, the point of voltage sensing is important
to ensure that the voltage regulation is acceptable for all of the loads. In general, remote
sensing is used and the point of sensing is selected to minimize interaction of the various
loads through line drops caused by their load currents. Figure 2-8 shows multiple loads
connected with a distribution bus; remote sensing is used at the point where the power
leads connect to the distribution bus.
M362161-01 Rev J
2-15
DLM 600W Series
(1)
*SETUP Switch Position-1, REM SNS, Set to ON
(1) For best performance use twisted shielded pair.
Figure 2-8. Distribution Bus Connection with Remote Sensing
2-16
M362161-01 Rev J
DLM 600W Series
2.12
Parallel Operation
Up to four power supplies of the same model can be connected in parallel. The
paralleled supplies operate in a master/slave configuration, where the master controls
the output voltage and total current, and provides control signals to the slaves to set
their output current. The master and slave supplies will share the output current
equally. Either local or remote sensing can be used.
Figure 2-9 shows a parallel connection of two units with remote sensing.
CAUTION
The outputs of paralleled units must be wired in parallel at the rear
panel output terminals of the units. Use the shortest practical cable
length. Operation of a unit without a negative (return) connection
could result in damage.
Figure 2-9. Parallel Connection of Units with Remote Sensing
M362161-01 Rev J
2-17
DLM 600W Series
Setup for the parallel configuration is as follows:
1.
Connect the outputs of the units in parallel at the rear panel output terminals
using short cable lengths. Connect the load wires to the output terminals of the
master unit.
2.
Interconnect the master and slave units with the PARALLELING CABLE,
Sorensen part number DLMP1. Either of the two rear panel PARALLEL I/O
connectors can be used, as they are pinned out the same. Refer to Figure 2-10
for an illustration of the PARALLEL I/O connector and Table 2–4 for pinout
information.
Figure 2-10. Parallel I/O Connector
3.
For the slave units, select the slave mode by turning ON the SLAVE position
(Position–2) of the SETUP switch. The master unit must have the SLAVE
position (Position–2) of the SETUP switch set to OFF.
4.
Adjust the OVP setting of the slave unit to full scale.
5.
The voltage, current, and OVP are adjusted with the controls of the master unit.
The voltage display of the slave units will be blanked out. The current displays of
all units must be summed to derive the total load current.
6.
The OUTPUT switch of the master unit will turn off all of the units. The OUTPUT
switch of a slave unit will turn off only its output; the remaining units will continue
to operate and will assume that portion of the load supplied by the slave unit.
7.
Turning off the POWER switch of any unit will result in shutdown of all units.
8.
A shutdown occurring in any unit (resulting from a fault, OVP, overtemperature,
or loss of AC power) will result in shutdown of all units.
9.
External control through the REMOTE–ANALOG INTERFACE and interface
selections with the SETUP switch are done with the master unit.
2-18
M362161-01 Rev J
DLM 600W Series
2.12.1
Parallel I/O Connector Pinout
The PARALLEL I/O connector is a 6–position connector, Molex #43045-0602. The
mating connector is Molex #43025-0600; and, its terminals are Molex #43030-0009.
The pinout is presented in Table 2–4.
Pin Number
Function
1
Parallel Drive Bus
2
Parallel Drive Return
3
Parallel Disable Bus
4
Parallel Disable Return
5
Not Used
6
Not Used
Table 2–4. Parallel I/O Connector Pinout
2.12.2
Parallel I/O Interface Functions
The PARALLEL I/O INTERFACE provides control signals for implementing the
master/slave paralleling of multiple units. The following sections describe the functions
of the various signals. Pin numbers correspond to the PARALLEL I/O INTERFACE
connector pinout; also refer to Table 2–4.
PARALLEL DRIVE: Pin-1, output signal of a master unit and input signal of slave units
used for programming the slave units. Signal is not isolated from the negative (return)
output of the unit.
PARALLEL DRIVE RETURN: Pin-2, return for PARALLEL DRIVE signal. Signal is not
isolated from the negative (return) output of the unit.
PARALLEL DISABLE: Pin-3, active–low control signal common to both master and
slave units that will force all units to shut down if any one of the units shuts down.
Signal is not isolated from the negative (return) output of the unit.
PARALLEL DISABLE RETURN: Pin 4, return for PARALLEL DISABLE signal. Signal
is not isolated from the negative (return) output of the unit.
Unused Pins: Pin 5 and Pin 6.
M362161-01 Rev J
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DLM 600W Series
2.13
Series Operation
Multiple units of the same model can be connected in series to obtain a higher output
voltage, within the limits of the 300V(PK) maximum float potential. The supplies are
interconnected with the negative terminal of one supply being connected to the positive
terminal of other.
The output voltage is derived from the positive and negative terminals of the total string.
Each supply is individually adjusted, with the total output voltage being the sum of the
individual outputs. The output current is the same for each unit. Either local or remote
sensing can be used.
Figure 2-11 shows the series connection of two units with local sensing. Figure 2-12
shows the series connection of two units with remote sensing.
CAUTION
To prevent damage to a supply, do not connect the remote sense
leads of one supply across the total series string.
Figure 2-11. Series Connection of Units with Local Sensing
2-20
M362161-01 Rev J
DLM 600W Series
Figure 2-12. Series Connection of Units with Remote Sensing
M362161-01 Rev J
2-21
DLM 600W Series
2.14
Special Application Warning
The DLM600 family of supply requires freewheeling and blocking diodes while driving
inductive loads or batteries to protect the power supply from damage caused by power
being fed back into the supply and from high voltage transients.
2.14.1
Suggested Procedure for Diode Selection
The Peak Reverse Voltage ratings should be a minimum of 2-3 times the Power Supply
maximum output voltage. The Continuous Forward Current ratings should be a
minimum of 1.5 times the Power Supply maximum output current. Heatsink may be
required. There also may be a need for higher voltage rated parts, dependent on load
circuit design and inductor values.
Figure 2-13. Diode Selection
2-22
M362161-01 Rev J
SECTION 3
OPERATION
3.1
Introduction
The DLM Series power supplies have a full complement of controls, indicators, and
connectors that allow the user to easily install, setup, and operate the unit.
3.2
Controls and Indicators
Refer to Figure 3-1 for an illustration of the front and rear panel controls and indicators.
1.
VOLTAGE Display: 3.5 digit, 7–segment LED display that normally indicates the
output voltage. When the V/I PREVIEW switch is pressed, the display indicates
the programmed setting of output voltage. When the OVP PREVIEW switch is
pressed, the display indicates the programmed setting of OVP.
2.
CURRENT Display: 3.5 digit 7–segment LED display that normally indicates the
output current. When the V/I Preview switch is pressed, the display indicates the
programmed setting of output current.
3.
VOLTAGE Control: 10–Turn potentiometer for adjusting the output voltage.
4.
CURRENT Control: 10–Turn potentiometer for adjusting the output current.
5.
OVP SET Control: 20–Turn trimmer potentiometer for adjusting overvoltage
protection.
6.
POWER Switch: Push–on/Push–off switch for turning the unit on and off.
7.
OUTPUT Switch: Push–on/Push–off switch for turning the output on and off.
8.
V/I PREVIEW Switch: Momentary push–button switch for previewing the
programmed settings of output voltage and current. The programmed setting is
derived from the front panel controls, the analog interface, or the GPIB interface,
whichever has control.
M362161-01 Rev J
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DLM 600W Series
Figure 3-1. Front and Rear Panel Views
3-2
M362161-01 Rev J
DLM 600W Series
9.
OVP PREVIEW Switch: Momentary push–button switch for previewing the
programmed setting of OVP. The programming signal is derived from the front
panel control, the analog interface, or the GPIB interface, whichever has control.
10.
LOCAL(REMOTE) Switch: Momentary push–button switch for selecting local
front–panel control while in GPIB remote operation, or toggling between the
front–panel and remote analog programming when analog interface is used.
Lockout function could be utilized, for both the GPIB and analog interface, to
disable the front panel controls when using remote control.
11.
REM (Remote) Indicator: Green LED lights when in remote programming mode,
either GPIB or analog interface.
12.
OUTPUT Indicator: Green LED lights when the DC output is enabled.
13.
VOLTAGE Indicator: Green LED lights for the constant–voltage mode of
operation.
14.
CURRENT Indicator: Green LED lights for the constant–current mode of
operation.
15.
OVP (Overvoltage Protection) Indicator: Red LED lights for tripped OVP; the
output is also turned off.
16.
FAULT Indicator: Red LED lights for overtemperature shutdown or summary
fault condition; the output is also turned off.
17.
EXT OFF (External Off) Indicator: Green LED lights when the output is turned
off using the remote shutdown signal of either the remote analog interface or the
GPIB interface.
18.
AC Line Input: IEC connector for the AC input power cord.
19.
POSITIVE DC Output: For low–voltage models rated 5V–60V, bus bar, with
#10-32 screw.
20.
NEGATIVE DC Output: For low–voltage models rated 5V–60V, bus bar, with
#10-32 screw.
21.
ANALOG INTERFACE Connector: Connector for remote analog interface,
comprising programming, monitoring, and digital input/output control signals.
22.
REMOTE SENSE (REM SNS) Connector: Connector for making remote
connections to the load for regulation of its voltage and compensation of line
drop. Positive (+) terminal is connected to positive load terminal and negative (–)
terminal is connected to negative load terminal.
M362161-01 Rev J
3-3
DLM 600W Series
23.
PARALLEL I/O Connector: Two connectors used for configuring multiple power
supplies for parallel operation with master/slave control. Both connectors have
the same pinout and can be used interchangeably. The designation of master
and slaves is selected with the SETUP switch.
24.
SETUP Switch: Eight–section switch for selecting remote sensing, slave unit,
and 0–5 VDC or 0–10 VDC voltage ranges for programming and monitoring.
25.
Ground Stud: #6-32 stud for chassis ground connection.
26.
POSITIVE DC Output: For high–voltage models rated 80V–300V, terminal
block, with #6-32 screws.
27.
NEGATIVE DC Output: For high–voltage models rated 80V–300V, terminal
block, with #6-32 screws.
3.3
3.3.1
Initial Functional Tests
Power–On Check
1.
Ensure that the POWER and OUTPUT switches are in the OFF position (switch
buttons out).
2.
Ensure that there are no connections to the REMOTE ANALOG INTERFACE
connector, and that all positions of the SETUP switch are OFF (switches down).
3.
Turn the controls for the VOLTAGE and CURRENT fully counter–clockwise.
4.
Turn the control for OVP fully clockwise.
5.
Connect the power cord to an AC power source
6.
Turn the front panel POWER switch to the ON position (switch button in). The
power supply will execute the power–up routine for approximately 7 seconds: all
LED indicators will be on; all display LED segments will be on; the internal fans
will run at maximum speed; the OVP and FAULT monitors will be reset.
7.
After power–up, ensure that both of the front panel digital displays are on and
that both of the displays indicate zero. Also, the following LED indicators should
be off: OVP, FAULT, EXT–OFF, REM and OUTPUT.
8.
Turn the POWER switch ON.
9.
Turn the control for the CURRENT fully clockwise.
10.
Ensure that the VOLTAGE indicator is on and that the CURRENT indicator is off.
3-4
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DLM 600W Series
3.3.2
Constant–Voltage Mode Operation Check
1.
Ensure that the front panel POWER and OUTPUT switches are in the OFF
position (switch buttons out).
2.
Connect a digital voltmeter (DVM) to measure the voltage at the output terminals
3.
Turn the VOLTAGE control on the front panel fully counter–clockwise.
4.
Turn the CURRENT control on the front panel fully clockwise.
5.
Turn the front panel POWER and OUTPUT switches to the ON position (switch
buttons in).
6.
Slowly turn the control for the VOLTAGE clockwise and observe the values of the
VOLTAGE display and the DVM. Adjust the control for the VOLTAGE across its
full range.
7.
Compare the DVM reading with the front panel display reading to verify the
accuracy of the front panel display for VOLTAGE.
8.
Ensure that the control for VOLTAGE adjusts the output voltage across the full
rated voltage range. Also, the VOLTAGE indicator should be on and the
CURRENT indicator should be off.
3.3.3
Constant–Current Mode Operation Check
1.
Ensure that the front panel POWER and OUTPUT switches are in the OFF
position (switch buttons out).
2.
Connect a DC shunt across the output terminals. Ensure that the rating of the
DC shunt and the connecting wire exceed the output current capability of the
power supply.
3.
Connect a digital voltmeter (DVM) across the DC shunt.
4.
Turn the CURRENT control on the front panel fully counter–clockwise.
5.
Turn the VOLTAGE control on the front panel fully clockwise.
6.
Turn the front panel POWER and OUTPUT switches to the ON position (switch
buttons in).
7.
Turn the control for the CURRENT slowly clockwise and observe the values of
the CURRENT display and the DVM. Adjust the control for the CURRENT across
its full range.
M362161-01 Rev J
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DLM 600W Series
8.
Compare the DVM reading with the front panel display reading to verify accuracy
of the front panel display for CURRENT. The DVM reading must be converted to
current by multiplying the DVM reading by a conversion factor equal to the DC
current rating of the shunt divided by the burden voltage rating of the shunt.
9.
Ensure that the control for CURRENT adjusts the output current across the full
rated current range. Also, the CURRENT indicator should be on and the
VOLTAGE indicator should be off.
3.4
Mode of Operation Setup
The power supply is capable of operating in constant–voltage or constant–current
mode. The mode of operation is dependent on the settings of the VOLTAGE and
CURRENT controls and resistance of the load. The power supply can automatically
crossover between the two modes of operation in response to load demands; refer to
Figure 3-2. The mode of operation is indicated with front panel LED's: VOLTAGE for
constant–voltage and CURRENT for constant–current.
Figure 3-2. CV and CC Modes of Operation
3.4.1
Constant–Voltage Mode of Operation
The power supply will operate in constant–voltage mode whenever the load current is
less than the current setting. In this mode, the power supply maintains the output
voltage precisely regulated to the voltage setting while the load current varies with the
load requirements. This condition is maintained as long as the load current is less than
the current setting. If the load resistance decreases to where the load current attempts
to exceed the current setting, the output current is then regulated at the set value and
the output voltage decreases. This is the automatic crossover to constant–current
mode of operation.
3-6
M362161-01 Rev J
DLM 600W Series
3.4.2
Constant–Current Mode of Operation
The power supply will operate in constant–current mode whenever the load resistance
times the current limit setting is less than the voltage setting. In this mode, the power
supply maintains the output current precisely regulated to the current setting while the
load voltage varies with load requirements. This condition is maintained as long as the
load resistance is less than the voltage setting divided by the current setting. If the load
resistance increases to where the load voltage attempts to exceed the voltage setting,
the output voltage is then regulated to the set value and the output current decreases.
This is the automatic crossover to constant–voltage mode of operation.
3.4.3
Adjustment of Constant–Voltage Operation
Follow these steps to set the power supply for constant–voltage mode of operation:
1.
Turn the front panel POWER switch to the ON position and the OUTPUT switch
to the OFF position.
2.
Press in the V/I PREVIEW switch to display the programmed setting of the output
voltage and current. Set the displayed values to the desired output voltage and
an output current that would exceed the load current. The current setting must be
greater than the maximum peak current required by the load. If the load current
attempts to exceed the limit value, the power supply will enter the constant–
current mode of operation: The output voltage will decrease and no longer will be
regulated.
3.
Turn the front panel OUTPUT switch to the ON position. The VOLTAGE indicator
should be ON and the CURRENT indicator should be OFF.
3.4.4
Adjustment of Constant–Current Operation
Follow these steps to set the power supply for constant–current mode of operation:
1.
Turn the front panel POWER switch to the ON position and the OUTPUT switch
to the OFF position.
2.
Press in the V/I PREVIEW switch to display the programmed setting of the output
voltage and current. Set the displayed values to the desired output current and
an output voltage that would exceed the maximum compliance voltage required
by the load. The voltage setting must be greater than the maximum peak voltage
required by the load. If the load voltage attempts to exceed the limit value, the
power supply will enter the constant–voltage mode of operation: The output
current will decrease and no longer will be regulated.
3.
Turn the front panel OUTPUT switch to the ON position. The CURRENT
indicator should be ON and the VOLTAGE indicator should be OFF.
M362161-01 Rev J
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DLM 600W Series
3.5
OVP Operation
The OVP monitor provides protection from overvoltage conditions that could be
generated at the load due to improper adjustment of the output voltage or malfunction
of the unit. Provisions are available to set the OVP threshold either with the front panel
controls or remotely through the analog interface (or, through the optional GPIB
interface).
The monitor measures the output voltage at the point where the sense leads are
connected: either internally at the output terminals or at the remote sense leads,
depending on which method of sensing is selected. If remote sensing is selected, a
secondary monitor measures the voltage at the output terminals, in addition to the
primary monitor measuring the load voltage. This provides protection in case the
remote sense leads are disconnected.
When the OVP is tripped, the output converter is turned off and the output capacitors
are discharged with a downprogrammer. In addition, the front panel OVP indicator is
turned on.
3.5.1
Adjustment of OVP Threshold
Use the following procedure to set the OVP threshold:
1.
Turn the front panel POWER switch to the ON position and the OUTPUT switch
to the OFF position.
2.
Press in the V/I PREVIEW switch to display the programmed setting of the output
voltage and current. Set the displayed values to the desired output voltage and
current.
3.
Press in the OVP PREVIEW switch to display the programmed setting of the OVP
threshold. Ensure that the OVP setting exceeds the setting of the output voltage;
otherwise, the OVP will be tripped as soon as the POWER switch is turned ON.
4.
OVP operation is verified as follows: set the OVP threshold to less that full scale
output voltage rating of the power supply; set the output voltage to less than the
OVP threshold; turn POWER switch ON; adjust output voltage so that OVP
threshold is exceeded; output will shut down and OVP indicator will be turned on
when OVP threshold is reached.
3-8
M362161-01 Rev J
DLM 600W Series
3.5.2
Resetting OVP
Perform the following to reset the OVP monitor if it has been activated:
1.
Reduce the power supply’s output voltage to below the OVP threshold.
2.
Ensure that the connections for the power and sense leads are correct.
3.
The OVP monitor is reset by toggling OFF and then back ON either of the
following switches or signals: the OUTPUT switch, the POWER switch, the
EXTERNAL–OFF signal of the REMOTE ANALOG INTERFACE, or through the
optional GPIB interface.
3.6
3.6.1
Front Panel Switches
POWER Switch
The POWER switch turns on the autoranging AC input rectifier and the control circuits
of the unit. It initiates a power–up routine (approximately 7 seconds in duration) that
performs an indicator/display test, high speed fan start–up, and range setting of the
rectifier.
The POWER switch does not disconnect the AC input lines from the unit; therefore, the
input filter networks remain connected when the switch is turned off.
3.6.2
OUTPUT Switch
The OUTPUT switch turns the output converter on and off. It will also reset the OVP
and FAULT monitors when it is toggled off and then back on.
When the switch is turned off, the downprogrammer is enabled to discharge the output
capacitors. After a time delay, the downprogrammer is turned off, and the output of the
unit becomes a high impedance. The switch does not disconnect the load from the
output of the unit; therefore, the output filter capacitors and bleeder resistance remain
connected when the switch is turned off.
When multiple units are operated in parallel, the switch functions differently for the
master unit as compared to the slaves. The OUTPUT switch of the master unit will turn
all units off, and each unit will discharge its output filter capacitors. However, the
OUTPUT switch of the slave units will only turn off their individual outputs; also, the
downprogrammer of the slaves will not be turned on.
M362161-01 Rev J
3-9
DLM 600W Series
3.6.3
V/I and OVP PREVIEW Switches
The V/I and OVP PREVIEW switches allow the front panel displays to show the
programmed values for the output voltage, current, and OVP. They can be used to set
the output parameters prior to turning on the output, and without disturbing the load
connections. In addition, they allow checking the settings after the output is enabled.
The preview functions remain operational when remote control is selected, either the
analog or GPIB interface.
3.6.4
LOCAL/REMOTE Switch
The LOCAL/REMOTE switch allows selecting either the front panel controls or the
remote interface for programming the output voltage, current, or OVP. A remote
interface (either analog or GPIB) must be enabled for the switch to be functional.
With the REMOTE ANALOG INTERFACE, the switch provides a toggle function to
alternate between the programmed settings of the front panel and analog interface
every time it is pressed. The REM front panel indicator is turned on when control is
through the analog interface. The LOCAL–LOCKOUT control signal of the interface
could be used to disable the toggling and maintain remote control.
When the GPIB interface is enabled, pressing the switch will transfer control to the front
panel; however, toggling will not occur if it is pressed again. The GPIB controller must
issue a command to the power supply before control will revert to the GPIB. A local–
lockout function is also available with the GPIB interface.
3.7
Reverse Polarity Protection
The output of the power supply is protected against reverse polarity sources connected
to the output terminals. The output terminals have diodes connected directly across
them. If the voltage at the output were to reverse in polarity, the diodes would conduct
and clamp it to a forward voltage drop, of approximately 1V.
3-10
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DLM 600W Series
3.8
Battery Charging
When using a power supply to charge a battery, the following precautions should be
taken:
1.
Connect an isolation diode in series with one of the output terminals of the power
supply. This diode will prevent discharge of the battery if the power supply were
to be turned off. The diode must have suitable current and voltage ratings and
should be mounted on an appropriate heat sink.
2.
Adjust the VOLTAGE setting to the desired float voltage using the V/I PREVIEW
switch or with the power supply disconnected from the battery. The VOLTAGE
setting should compensate for the voltage drop of the isolation diode, if local
sensing is used.
3.
Adjust the CURRENT setting to the desired current limit value when charging a
battery.
When recharging a battery, the power supply will initially operate in constant–
current mode, regulating the output current to the current set value. As the
battery charges, the battery voltage increases until the float voltage setting is
reached. Then, the power supply enters the constant–voltage mode of operation,
regulating the output voltage at the float voltage setting. The battery current
decreases from the current set value, and eventually drops to a low float current
level when the battery is fully charged.
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DLM 600W Series
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3-12
M362161-01 Rev J
SECTION 4
ADVANCED OPERATION
4.1
Introduction
The DLM Series power supplies provide extended configuration and interface
capabilities to allow them to be adapted for special applications. The SETUP switch
allows selection of programming and monitor voltage ranges, remote sensing, or slave
mode of operation. The REMOTE ANALOG INTERFACE provides remote programmability and monitoring of the output voltage, current, and OVP, as well as digital I/O for
control and status annunciation.
4.2
SETUP Switch
The SETUP switch is accessible from the rear panel of the unit. Refer to Figure 4-1 for
an illustration showing switch positions and ON/OFF orientation, and Table 4–1 for the
functions of the switch positions. The factory default settings are all switch positions
OFF (down).
Figure 4-1. SETUP Switch
M362161-01 Rev J
4-1
DLM 600W Series
Switch Position
Function
OFF (Down) Position
ON (Up) Position
1
REM SNS
Local Sense
Remote Sense
2
Slave
Master or Standalone
Slave
3
Not Used
4
IMON, 10V Select
0–5V Range
0–10V Range
5
VMON, 10V Select
0–5V Range
0–10V Range
6
OVP, 10V Select
0–5V Range
0–10V Range
7
I, 10V Select
0–5V Range
0–10V Range
8
V, 10V Select
0–5V Range
0–10V Range
Table 4–1. Setup Switch Functions
4.2.1
SETUP Switch Functions
The SETUP switch allows configuring the power supply to user requirements. The
following paragraphs describe the functions of the various switch positions:
REM SNS: Position-1, when ON, selects the REM SNS connector as the source of the
feedback signal used for regulating the output voltage. When OFF, selects internal
sense at the output terminals for the feedback signal.
SLAVE: Position-2, when ON: selects the unit to be a slave; the front panel voltage
display and voltage/curent mode indicators are blanked out; the OUTPUT switch will
turn on/off only the individual slave unit; and the PARALLEL I/O ports are configured for
slave operation. When OFF: selects the unit to be a master or for standalone
operation; the OUTPUT switch will turn ON/OFF all of the paralleled units; the
PARALLEL I/O ports are configured for master operation.
IMON, 10V–Select: Position-3, when ON, selects 0–10 VDC range for readback of
output current. When OFF, selects 0–5 VDC range for readback of output current.
VMON, 10V–Select: Position-4, when ON, selects 0–10 VDC range for readback of
output voltage. When OFF, selects 0–5 VDC range for readback of output voltage.
OVP, 10V–Select: Position-5, when ON, selects 0–10 VDC programming of OVP
threshold. When OFF, selects 0–5 VDC programming of OVP threshold.
I, 10V–Select: Position-7, when ON, selects 0–10 VDC programming of output current.
When OFF, selects 0–5 VDC programming of output current.
V, 10V–Select: Position-8, when ON, selects 0–10 VDC programming of output
voltage. When OFF, selects 0–5 VDC programming of output voltage.
4-2
M362161-01 Rev J
DLM 600W Series
4.3
REMOTE ANALOG INTERFACE
The REMOTE ANALOG INTERFACE provides a means to remotely control and
monitor the operation of the power supply. Refer to Figure 4-2 for an illustration of the
connector, and Table 4–2 for pinout information.
Figure 4-2. Remote Analog Interface Connector
4.3.1
REMOTE ANALOG INTERFACE Connector
The REMOTE ANALOG INTERFACE connector is a 25–position female
subminiature–D type.
Pin No.
Function
Pin No.
Function
1
ANALOG–CONTROL Input
14
EXTERNAL–OFF Input (+)
2
EXTERNAL–OFF Return
15
Auxiliary 5 VDC Output (+)
3
OVP Programming Input
16
OVP Resistance
Programming Output
4
REMOTE–CONTROL Status Output
17
OVP Resistance
Programming Return
5
VOLTAGE–MODE Status Output
18
FAULT Status Output
6
Auxiliary 5 VDC Return
19
Voltage Monitor Output
7
Current Monitor Output
20
Voltage Resistance
Programming Return
8
Voltage/Current Monitor Return
21
Voltage Resistance
Programming Output
9
Voltage Programming Input
22
Current Resistance
Programming Output
10
Current Programming Input
23
Current Resistance
Programming Return
11
Not Used
24
LOCAL–LOCKOUT Input
12
V/I/OVP Programming Return
25
OVP Status Output
13
Not Used
Table 4–2. Remote Analog Interface Connector Pinout
M362161-01 Rev J
4-3
DLM 600W Series
4.3.2
REMOTE ANALOG INTERFACE Functions
The REMOTE ANALOG INTERFACE provides control signals for programming output
voltage, current, and OVP, monitoring the output voltage and current, and controlling
the operational state of the power supply. The following paragraphs describe the
functions of the various signals. Pin numbers correspond to the REMOTE ANALOG
INTERFACE connector pinout; also refer to Table 4–2.
Digital Control Input Signals
EXTERNAL–OFF: Pin-14, disables the output with a 2–30 VDC logic–high signal level.
Signal is referenced to Pin-2 and opto–isolated from the other analog interface signals
and the output of the unit.
EXTERNAL–OFF RETURN: Pin-2, signal return for EXTERNAL–OFF; opto–isolated
from the output of the unit.
LOCAL–LOCKOUT: Pin-24, disables front–panel control with a 0–0.8 VDC logic–low
signal level. Internal 100 k pullup provided to 5 VDC. Signal is referenced to Pin-6,
and is not isolated from the negative (return) output of the unit.
ANALOG–CONTROL: Pin-1, enables remote analog programming with a 0–0.8 VDC
logic–low signal level. When ANALOG–CONTROL is asserted, the power supply will
power–up with the analog interface in control of the output voltage, current, and OVP.
Internal 100 k pullup provided to 5 VDC. Signal is referenced to Pin-6, and is not
isolated from the negative (return) output of the unit.
Digital Status Output Signals
VOLTAGE–MODE: Pin-5, nominal 5 VDC logic level indicates operation in constant–
voltage mode. Source resistance is 750 . Signal is referenced to Pin-6, and is not
isolated from the negative (return) output of the unit.
REMOTE–CONTROL: Pin-4, nominal 5 VDC logic level indicates operation with
remote programming of output voltage, current, and OVP. Source resistance is 750 .
Signal is referenced to Pin-6, and is not isolated from the negative (return) output of the
unit.
OVP: Pin-25, nominal 5 VDC logic level indicates that the output has been disabled
because of overvoltage protection. Source resistance is 750 . Signal is referenced to
Pin-6, and is not isolated from the negative (return) output of the unit.
FAULT: Pin-18, nominal 5 VDC logic level indicates that the output has been disabled
because of overtemperature or summary fault. Source resistance is 750 . Signal is
referenced to Pin-6, and is not isolated from the negative (return) output of the unit.
4-4
M362161-01 Rev J
DLM 600W Series
Analog Output Signals
REMOTE VOLTAGE MONITOR: Pin-19, readback of the output voltage is provided
with a 0–5 VDC or 0–10 VDC signal (user selectable with SETUP switch) indicating
0–100% of full scale output. Signal is referenced to Pin-8, and is not isolated from the
negative (return) output of the unit.
REMOTE CURRENT MONITOR: Pin-7, readback of the output current is provided with
a 0–5 VDC or 0–10 VDC signal (user selectable with SETUP switch) indicating 0–100%
of full scale output. Signal is referenced to Pin-8, and is not isolated from the negative
(return) output of the unit.
Auxiliary 5 VDC Output
AUXILIARY 5 VDC OUTPUT: Pin-15, 5 VDC logic supply output is available
referenced to the control circuit ground, Pin-6; not isolated from the negative (return)
output of the unit. Source resistance is 47 .
AUXILIARY 5 VDC OUTPUT RETURN: Pin-6, return for 5 VDC logic supply output;
referenced to the other signals of the REMOTE ANALOG INTERFACE; not isolated
from the negative (return) output of the unit.
Remote Analog Programming Input Signals
REMOTE VOLTAGE PROGRAMMING INPUT: Pin-9, an input signal of 0–5 VDC or
0–10 VDC (user selectable with SETUP switch) programs the output voltage 0–100% of
full scale. Signal is referenced to Pin-12, and not isolated from the negative (return)
output of the unit.
REMOTE CURRENT PROGRAMMING INPUT: Pin-10, an input signal of 0–5 VDC or
0–10 VDC (user selectable with SETUP switch) programs the output current 0–100% of
full scale. Signal is referenced to Pin-12, and not isolated from the negative (return)
output of the unit.
REMOTE OVP PROGRAMMING INPUT: Pin-3, an input signal of 0–5 VDC or
0–10 VDC (user selectable with SETUP switch) programs the OVP threshold from
5–110% of full scale output voltage. Signal is referenced to Pin-12, and not isolated
from the negative (return) output of the unit.
REMOTE RESISTANCE VOLTAGE–PROGRAMMING OUTPUT: Pin-21 connected
to Pin-9, REMOTE VOLTAGE PROGRAMMING INPUT, with an adjustable resistance
of 0–5 k connected between Pin-21 and Pin-20, programs the output voltage from
0–100% of full scale. Signals are not isolated from the negative (return) output of the
unit.
M362161-01 Rev J
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DLM 600W Series
REMOTE RESISTANCE VOLTAGE–PROGRAMMING RETURN: Pin-20, signal return
for REMOTE RESISTANCE VOLTAGE–PROGRAMMING OUTPUT. Signal is not
isolated from the negative (return) output of the unit.
REMOTE RESISTANCE CURRENT–PROGRAMMING OUTPUT: Pin-22 connected to
Pin-10, REMOTE CURRENT PROGRAMMING INPUT, with an adjustable resistance of
0–5 k connected between Pin-22 and Pin-23, programs output current from 0–100%
of full scale. Signals are not isolated from the negative (return) output of the unit.
REMOTE RESISTANCE CURRENT–PROGRAMMING RETURN: Pin-23, signal return
for REMOTE RESISTANCE CURRENT–PROGRAMMING OUTPUT. Signal is not
isolated from the negative (return) output of the unit.
REMOTE RESISTANCE OVP–PROGRAMMING OUTPUT: Pin-16 connected to Pin-3,
REMOTE OVP PROGRAMMING INPUT, with an adjustable resistance of 0–5 k
connected between Pin-16 and Pin-17, programs the OVP threshold from 5–110% of
full scale output voltage. Signals are not isolated from the negative (return) output of
the unit.
REMOTE RESISTANCE OVP–PROGRAMMING RETURN: Pin-17, signal return for
REMOTE RESISTANCE OVP–PROGRAMMING OUTPUT. Signal is not isolated from
the negative (return) output of the unit.
Unused Pins: Pin-11 and Pin-13.
4.4
Remote Programming
Remote programming is possible for the output voltage, current, and OVP. Either
external voltage sources or resistances can be used to program the output parameters
from zero to full scale. The programming methods can be used in any combination.
Also, the programmed values are totally independent of those set with the front panel
controls. The front panel V/I and OVP PREVIEW switches remain functional during
remote control, allowing verification of the programmed settings.
A front panel LOCAL/REMOTE switch (momentary action) allows toggling between
front–panel and remote control. The REM indicator will be on when remote control is
enabled. This allows stepping between two parameter values, or could be used to
facilitate troubleshooting the remote interface. However, the unit will always power–up
in remote control if the remote interface is enabled.
The LOCAL–LOCKOUT digital control signal can be used to disable the toggling
function, and keep the power supply in remote control. This is advantageous in
applications where operator adjustment of the output parameters is not desired.
4-6
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Table 4–3 presents the options for remote control operation; pin numbers refer to the
REMOTE ANALOG INTERFACE connector.
Mode of
Operation
Analog–Control Local–Lockout
Signal, Pin-1
Signal, Pin-24
Power–Up
State
Local/Remote
Toggling
Remote Only
Low
Low
Remote
No
Local Only
Open
Open
Local
No
Local/Remote
Low
Open
Remote
Yes
Table 4–3. Remote Programming Options
When remote programming is enabled, front panel control is disabled for all
parameters. Therefore, all three parameters must be set remotely: The parameters to
be controlled would be connected to the programming sources, while the others would
be pulled up to full scale or the desired limit. This can be accomplished with resistance
programming of the parameters that would not be adjusted, or by programming them to
full scale with the AUXILIARY 5V OUTPUT (the 0–5 VDC range must be selected).
Use appropriate measures to ensure that the wiring connected to the REMOTE
ANALOG INTERFACE connector is protected from noise coupling. Noise appearing on
the programming signals could modulate the output of the unit. Depending upon the
noise environment of the application, the wires may have to be twisted and shielded.
Also, if the output negative (return) is floated with respect to chassis, the signals of the
REMOTE ANALOG INTERFACE connector (except for the opto–isolated EXTERNAL–
OFF signal) will float at the same potential. Ensure that the interface circuitry can
withstand the float potential.
CAUTION
The signals of the REMOTE ANALOG INTERFACE connector
have internal connections to the output negative (return) terminal.
Damage could result if they are connected to the power supply
output positive.
CAUTION
Ensure that the unit is unplugged from the AC input prior to making
any changes to connections of the remote interface or settings of
the SETUP switch.
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DLM 600W Series
4.4.1
Voltage–Source Programming of Output Voltage
Refer to Figure 4-3 for setting up voltage–source programming of the output voltage.
1.
Set Position-8 of the SETUP switch to OFF for 0–5 VDC programming range.
2.
Set Position-8 of the SETUP switch to ON for 0–10 VDC programming range.
3.
Connect the external programming voltage source to the REMOTE ANALOG
INTERFACE connector, with positive to Pin-9 and negative to Pin-12.
4.
Program the other parameters to the desired limit values: CURRENT
PROGRAMMING INPUT, Pin-10, and the OVP PROGRAMMING INPUT, Pin-3,
with respect to Pin-12. AUXILIARY 5VDC OUTPUT, Pin-15, could be used for
full–scale programming.
NOTE: Step 4 is mandatory. The power supply will not work properly without it.
5.
Connect Pin-1, ANALOG–CONTROL, of the REMOTE ANALOG INTERFACE
connector to Pin-6.
Figure 4-3. Voltage–Source Programming of Output Voltage
4-8
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DLM 600W Series
4.4.2
Voltage–Source Programming of Output Current
Refer to Figure 4-4 for setting up voltage–source programming of the output current.
1.
Set Position-7 of the SETUP switch to OFF for 0–5 VDC programming range.
2.
Set Position-7 of the SETUP switch to ON for 0–10 VDC programming range.
3.
Connect the external programming voltage source to the REMOTE ANALOG
INTERFACE connector, with positive to Pin-10 and negative to Pin-12.
4.
Program the other parameters to the desired limit values: VOLTAGE
PROGRAMMING INPUT, Pin-9, and the OVP PROGRAMMING INPUT, Pin-3,
with respect to Pin-12. AUXILIARY 5VDC OUTPUT, Pin-15, could be used for
full–scale programming.
NOTE: Step 4 is mandatory. The power supply will not work properly without it.
5.
Connect Pin-1, ANALOG–CONTROL, of the REMOTE ANALOG INTERFACE
connector to Pin-6.
Figure 4-4. Voltage–Source Programming of Output Current
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DLM 600W Series
4.4.3
Voltage–Source Programming of OVP
Refer to Figure 4-5 for setting up voltage–source programming of OVP.
1.
Set Position-6 of the SETUP switch to OFF for 0–5 VDC programming range.
2.
Set Position-6 of the SETUP switch to ON for 0–10 VDC programming range.
3.
Connect the external programming voltage source to the REMOTE ANALOG
INTERFACE connector, with positive to Pin-3 and negative to Pin-12.
6.
Program the other parameters to the desired limit values: VOLTAGE
PROGRAMMING INPUT, Pin-9, and the CURRENT PROGRAMMING INPUT,
Pin-10, with respect to Pin-12. AUXILIARY 5VDC OUTPUT, Pin-15, could be
used for full–scale programming.
NOTE: Step 4 is mandatory. The power supply will not work properly without it.
4.
Connect Pin-1, ANALOG–CONTROL, of the REMOTE ANALOG INTERFACE
connector to Pin-6.
Figure 4-5. Voltage–Source Programming of OVP
4-10
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DLM 600W Series
4.4.4
Resistance Programming of Output Voltage
Refer to Figure 4-6 for setting up resistance programming of the output voltage.
1.
Set Position-8 of the SETUP switch to OFF for 0–5 VDC programming range
2.
Connect the external programming resistance, 0–5 k , to the REMOTE
ANALOG INTERFACE connector, from Pin-20 to Pin-21.
3.
Connect a jumper from Pin-21 to Pin-9.
7.
Program the other parameters to the desired limit values: CURRENT
PROGRAMMING INPUT, Pin-10, and the OVP PROGRAMMING INPUT, Pin-3,
with respect to Pin-12. AUXILIARY 5VDC OUTPUT, Pin-15, could be used for
full–scale programming.
NOTE: Step 4 is mandatory. The power supply will not work properly without it.
4.
Connect Pin-1, ANALOG–CONTROL, of the REMOTE ANALOG INTERFACE
connector to Pin-6.
Figure 4-6. Resistance Programming of Output Voltage
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DLM 600W Series
4.4.5
Resistance Programming of Output Current
Refer to Figure 4-7 for resistance programming of the output current.
1.
Set Position-7 of the SETUP switch to OFF for 0–5 VDC programming range.
2.
Connect the external programming resistance, 0–5 k , to the REMOTE
ANALOG INTERFACE connector, from Pin-23 to Pin-22.
3.
Connect a jumper from Pin-22 to Pin-10.
8.
Program the other parameters to the desired limit values: VOLTAGE
PROGRAMMING INPUT, Pin-9, and the OVP PROGRAMMING INPUT, Pin-3,
with respect to Pin-12. AUXILIARY 5VDC OUTPUT, Pin-15, could be used for
full–scale programming.
NOTE: Step 4 is mandatory. The power supply will not work properly without it.
4.
Connect Pin-1, ANALOG–CONTROL, of the REMOTE ANALOG INTERFACE
connector to Pin-6.
Figure 4-7. Resistance Programming of Output Current
4-12
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DLM 600W Series
4.4.6
Resistance Programming of OVP
Refer to Figure 4-8 for setting up resistance programming of OVP.
1.
Set Position-6 of the SETUP switch to OFF for 0–5 VDC programming range.
2.
Connect the external resistance, 0–5 k , to the REMOTE ANALOG INTERFACE
connector, from Pin-17 to Pin-16.
3.
Connect a jumper from Pin-16 to Pin-3.
4.
Program the other parameters to the desired limit values: VOLTAGE
PROGRAMMING INPUT, Pin-9, and the CURRENT PROGRAMMING INPUT,
Pin-10, with respect to Pin-12. AUXILIARY 5VDC OUTPUT, Pin-15, could be
used for full–scale programming.
5.
Connect Pin-1, ANALOG–CONTROL, of the REMOTE ANALOG INTERFACE
connector to Pin-6.
Figure 4-8. Resistance Programming of OVP
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DLM 600W Series
4.5
EXTERNAL–OFF Control
The EXTERNAL–OFF control input provides the same functionality as the OUTPUT
switch on the front panel. When asserted, it will turn off the output converter, discharge
the output capacitors with the downprogrammer, and reset the OVP and FAULT
monitors. It is opto–isolated from the other signals of the REMOTE ANALOG
INTERFACE.
4.5.1
EXTERNAL–OFF with Voltage Source
EXTERNAL–OFF is asserted when a voltage within the range of 2–30 VDC is applied
from Pin-14, positive, to Pin-2, return, of the REMOTE ANALOG INTERFACE
connector. Refer to Figure 4-9. The voltage source and switch could be replaced with
a logic gate for digital ON/OFF control.
CAUTION
The maximum float potential of either line of the EXTERNAL–OFF
control signal with respect to any other signal of the REMOTE
ANALOG INTERFACE is 60V(PK).
Figure 4-9. EXTERNAL–OFF with Voltage Source
4-14
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DLM 600W Series
4.5.2
EXTERNAL–OFF with AUXILIARY 5 VDC OUTPUT
The internal AUXILIARY 5 VDC OUTPUT of the REMOTE ANALOG INTERFACE can
be used as the voltage source to drive the EXTERNAL OFF input. Because the 5 VDC
source is referenced to the other signals of the analog interface, opto–isolation would
be lost. The external contacts must then provide the isolation between the external
control circuits and the power supply. Refer to Figure 4-10 for connection information.
Figure 4-10. EXTERNAL–OFF with AUXILIARY 5 VDC OUTPUT
4.6
Remote Monitoring
Analog signals are available for monitoring the output voltage and current. These
signals vary proportionally to the output parameters, and have user selectable ranges of
0–5 VDC or 0–10 VDC for an output change from zero to full scale. Refer to
Table 4–4 for information on configuring the monitors.
Monitor
Signal
REMOTE ANALOG
INTERFACE Connections
SETUP Switch
Signal
Range
Signal
Return
Position
Setting
Voltage
Pin-19
Pin-8
5, VMON
OFF
0–5 VDC
Voltage
Pin-19
Pin-8
5, VMON
ON
0–10 VDC
Current
Pin-7
Pin-8
4, IMON
OFF
0–5 VDC
Current
Pin-7
Pin-8
4, IMON
ON
0–10 VDC
Table 4–4. Remote Monitoring
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DLM 600W Series
4.7
Remote Digital Status Signals
Digital signals are available for remote monitoring the operational status of the unit.
Refer to Table 4–5 for information on the characteristics of the signals.
Status Signal
REMOTE ANALOG
INTERFACE Connections
Logic Levels (with no
signal output current)
Output
Resistance
Signal
Return
Asserted Not Asserted
VOLTAGE–MODE
Pin-5
Pin-6
5V
0V
750
REMOTE–CONTROL
Pin-4
Pin-6
5V
0V
750
OVP
Pin-25
Pin-6
5V
0V
750
FAULT
Pin-18
Pin-6
5V
0V
750
Table 4–5. Remote Digital Status Signals
4-16
M362161-01 Rev J
SECTION 5
MAINTENANCE
5.1
Introduction
This section provides information about troubleshooting, maintenance, and calibration.
5.2
Troubleshooting
If the power supply appears to be operating improperly, determine whether the power
supply, load, or external control/programming circuits are the cause. Configure the unit
for basic front panel controlled operation, and perform the checks of Section 3.3, Initial
Functional Tests to determine if the problem is with the supply.
WARNING
POTENTIALLY LETHAL VOLTAGES EXIST IN THE POWER
CIRCUITS AND THE OUTPUT OF HIGH VOLTAGE MODELS.
Filter capacitors could store potentially dangerous amounts of energy
for some time after power is removed. Repairs should be done only by
experienced technical personnel. To prevent injury, follow the safety
precautions listed in the Safety Notice at the front of this manual.
Units requiring repair during their warranty period should be returned to the
manufacturer for service. Unauthorized repairs performed by anyone other than the
manufacturer during the warranty period may void the warranty. Any questions
regarding repair should be directed to the Service Department at 1-800-733-5427.
Include the model number and the serial number in any correspondence concerning the
power supply. To return a defective unit, follow the Warranty instructions (page v of this
manual).
Table 5–1 presents some checks that can be performed to diagnose problems, and
provides references to sections of this manual where further information is available.
SYMPTOM
M362161-01 Rev J
CHECK
ACTION
5-1
DLM 600W Series
SYMPTOM
CHECK
ACTION
No output; all displays and
indicators are blank
Is the utility power present?
Connect power
Is the AC input power cord
defective?
Check continuity; replace
if necessary
Unit starts but there is no
output; OVP and FAULT
indicators are off
Is the AC input voltage within
the allowed range?
Connect to appropriate
voltage source
Output is present
momentarily but quickly
shuts off; OVP and FAULT
indicators are off
Does the voltage of the AC
source sag when load is
applied?
Ensure that the AC
source has low output
impedance and can
supply adequate current
No output; displays and
indicators are functional
Is the OVP indicator on?
See Section 3.5, OVP
Operation
Is the EXT–OFF indicator on?
See Section 4.5,
EXTERNAL–OFF Control
Is the REM indicator on?
See Section 4.4, Remote
Programming
Is the FAULT indicator on?
Determine if an overtemperature condition exists;
allow unit to cool and then
toggle the OUTPUT
switch off and back on
If an overtemperature is
not present, an internal
fault exists
Output turns off as soon as
POWER switch is turned on;
OVP indicator turns on
Is remote sense selected,
but sense leads are not
connected?
See Section 2.10, Load
Voltage Sensing
Output voltage will not adjust
Is the unit in current–mode?
See Section 3.4, Mode of
Operation Setup
Output current will not adjust
Is the unit in voltage–mode?
See Section 3.4, Mode of
Operation Setup
Front panel controls are
nonfunctional
Is unit in remote control with
LOCAL–LOCKOUT enabled?
See Section 3.6.4,
LOCAL/REMOTE Switch
Front panel controls are
nonfunctional; voltage
display is off
Is slave mode selected?
See Section 2.12, Parallel
Operation
Large AC component
present in output
Is the power converter
unstable?
See Section 2.9.3, Noise
and Impedance Effects
Table 5–1. Troubleshooting Guide
5-2
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DLM 600W Series
5.3
Fuse Ratings
There are no user replaceable fuses in the power supply. Internal fuses are sized for
fault isolation, and, if they were open, would indicate that service is required. The
internal fuses are to be checked and replaced by qualified technical personnel. Refer
to Table 5–2 for a listing of the fuses.
REFERENCE DESIGNATOR
FUSE RATING
F1, F2
20A, 250 VAC, Time–Delay
F3
6.3A, 250 VAC; Type-F; 1,500AIC
F4
3A, 250 VAC, Fast–Acting
SIZE
0.25”
5 mm
1.25”
20 mm
PWB Mounting
Table 5–2. Internal Fuses
5.4
Cleaning
Because the unit uses forced convection cooling, the air flow through the unit can pull in
dust. In environments having high concentrations of dust, periodic cleaning may be
required. The exterior of the unit should be cleaned with a mild solution of detergent
and water. The solution should be applied onto a soft cloth, and not directly to the
surface of the unit. To prevent damage to materials, do not use aromatic hydrocarbons
or chlorinated solvents for cleaning.
5.5
Calibration
Calibration is easily performed, requiring only a voltmeter, DC shunt, and programming
voltage source. Ensure that the accuracy of the test equipment is sufficiently better
than the specifications for the parameters to be calibrated. Typically, a 6 ½ digit
voltmeter is adequate for voltage measurements, and a shunt having a 0.1% tolerance
for current measurements. The shunt must be sized appropriately to minimize its
temperature rise, and the resultant variation of the measurement due to the shunt
temperature coefficient. Also, allow the unit to warm up for 30 minutes at no load prior
to performing the calibration.
WARNING
The calibration procedures are performed with the power supply top
cover removed and the power on. Potentially lethal voltages exist in the
power circuits and the output of high voltage models. Use insulated
tools when making adjustments to circuit potentiometers, and do not
touch any components or circuits.
M362161-01 Rev J
5-3
DLM 600W Series
There is some interaction of the adjustments for offset and range of the output voltage
and current. Perform the offset adjustments before the range adjustments. It may take
several iterations to accurately make both adjustments.
There is some variation of the output current at high current levels because of the
temperature coefficient of the internal current shunts. Perform the current calibration
with the power supply initially at room temperature.
Refer to Figure 5-1 for the location of test points and potentiometers on the Main PWA,
and to Figure 5-2 for location of potentiometers on the Display PWA.
Figure 5-1. Main PWA Location of Test Points and Potentiometers
Figure 5-2. Display PWA Location of Potentiometers
5-4
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DLM 600W Series
5.5.1
Internal Reference Adjustment
Use the following procedure to adjust the internal –5.0 VDC reference:
1.
Connect a voltmeter from J14-4, positive lead, to J14-6, negative lead.
2.
Adjust potentiometer R379 for a reading on the voltmeter of –5.000 VDC.
5.5.2
Output Voltage Offset Adjustment
Calibration of the output voltage is done using remote control through the REMOTE
ANALOG INTERFACE. Use the following procedure to adjust the output voltage offset:
1.
Connect a voltmeter across the output terminals of the power supply.
2.
Connect a jumper from Pin-1 to Pin-6 of the REMOTE ANALOG INTERFACE
connector to enable remote control.
3.
Connect jumpers from Pin-15 to Pin-10 and Pin-3 of the REMOTE ANALOG
INTERFACE connector to program the output current and OVP to full scale.
4.
Connect a voltage source, set to 0.050 VDC, from Pin-9 to Pin-12 of the
REMOTE ANALOG INTERFACE connector.
5.
Adjust potentiometer R377 on the Main PWA for a reading on the external
voltmeter of 1% of full scale output voltage.
6.
Iterate the output voltage offset and range adjustment until both are accurate.
5.5.3
Output Voltage Range Adjustment
Calibration of the output voltage is done using remote control through the REMOTE
ANALOG INTERFACE. Use the following procedure to adjust the output voltage range:
1.
Connect a voltmeter across the output terminals of the power supply.
2.
Connect a jumper from Pin-1 to Pin-6 of the REMOTE ANALOG INTERFACE
connector to enable remote control.
3.
Connect jumpers from Pin-15 to Pin-10 and Pin-3 of the REMOTE ANALOG
INTERFACE connector to program the output current and OVP to full scale.
4.
Connect a voltage source, set to 5.00 VDC, from Pin-9 to Pin-12 of the REMOTE
ANALOG INTERFACE connector.
5.
Adjust potentiometer R378 on the Main PWA for a reading on the external
voltmeter of 100% of full scale output voltage.
6.
Iterate the output voltage offset and range adjustment until both are accurate.
M362161-01 Rev J
5-5
DLM 600W Series
5.5.4
Output Current Offset Adjustment
Calibration of the output current is done using remote control through the REMOTE
ANALOG INTERFACE. Use the following procedure to adjust the output current offset:
1.
Connect a DC shunt across the output terminals of the unit.
2.
Connect a jumper from Pin-1 to Pin-6 of the REMOTE ANALOG INTERFACE
connector to enable remote control.
3.
Connect jumpers from Pin-15 to Pin-9 and Pin-3 of the REMOTE ANALOG
INTERFACE connector to program the output voltage and OVP to full scale.
4.
Connect a voltage source, set to 0.050 VDC, from Pin-10 to Pin-12 of the
REMOTE ANALOG INTERFACE connector.
5.
Adjust potentiometer R375 on the Main PWA for a current through the external
shunt of 1% of full scale output current.
6.
Iterate the output current and offset adjustments until both are accurate.
5.5.5
Output Current Range Adjustment
Calibration of the output current is done using remote control through the REMOTE
ANALOG INTERFACE. Use the following procedure to adjust the output current range:
1.
Connect a DC shunt across the output terminals of the unit.
2.
Connect a jumper from Pin-1 to Pin-6 of the REMOTE ANALOG INTERFACE
connector to enable remote control.
3.
Connect jumpers from Pin-15 to Pin-9 and Pin-3 of the REMOTE ANALOG
INTERFACE connector to program the output voltage and OVP to full scale.
4.
Connect a voltage source, set to 5.00 VDC, from Pin-10 to Pin-12 of the
REMOTE ANALOG INTERFACE connector.
5.
Adjust potentiometer R376 on the Main PWA for a current through the external
shunt of 100% of full scale output current.
6.
Iterate the output current and offset adjustments until both are accurate.
5-6
M362161-01 Rev J
DLM 600W Series
5.5.6
Voltage Display Adjustment
Use the following procedure to calibrate the voltage display:
1.
Connect a voltmeter across the output terminals of the power supply.
2.
Adjust the front panel CURRENT and OVP controls to fully clockwise.
3.
Turn the OUTPUT switch on.
4.
Adjust the front panel VOLTAGE control for an output voltage equal to 100% of
full scale.
5.
Adjust potentiometer R13 on the Display PWA for a VOLTAGE display of 100%
of full scale.
5.5.7
Current Display Adjustment
Use the following procedure to calibrate the current display:
1.
Connect a DC shunt across the output terminals of the power supply.
2.
Adjust the front panel VOLTAGE and OVP controls to fully clockwise.
3.
Turn the OUTPUT switch on.
4.
Adjust the front panel CURRENT control for an output current equal to 100% of
full scale.
5.
Adjust potentiometer R15 on the Display PWA for a CURRENT display of 100%
of full scale.
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DLM 600W Series
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