Omega | DMD4059 Series | Owner Manual | Omega DMD4059 Series Owner Manual

Omega DMD4059 Series Owner Manual
DMD4059
DMD4059-DC
Strain Gauge to DC Isolated Transmitter
M-5000/0219
Model
DMD4059
DMD4059-DC
Power
85-265 VAC, 50/60 Hz or 60-300 VDC
9-30 VDC or 10-32 VAC
Description
The DMD4059 accepts an input from one to four strain gauges,
bridge sensors, load cells, or pressure transducers. It filters,
amplifies, and converts the resulting millivolt signal into the
selected DC voltage or current output that is linearly related to
the input.
The full 3-way (input, output, power) isolation makes this module
useful for ground loop elimination and signal isolation.
The adjustable excitation power supply generates a stable
source of voltage to drive from one to four 350 Ω (or greater)
devices. Sense lead circuitry is included to cancel the effects of
leadwire resistance.
Input, output, excitation and zero offset (up to ±100% of span)
are field configurable. Non-interactive zero and span simplifies
calibration.
A 20 VDC loop excitation supply for the output can be selectively
wired to power passive mA devices.
A green input LED and a red output LED vary in intensity with
changes in the process input and output signals.
An output test button provides a fixed output (independent of the
input) when held depressed. The test output level is potentiometer adjustable from 0 to 100% of output span.
Strain Gauge Input Ranges
100 Ω to 10,000 Ω bridges at 10 VDC
Up to four 350 Ω bridges at 10 VDC
Minimum:
0 to 5 mV range
0.5 mV/V sensitivity
Maximum:
0 to 400 mV range 40 mV/V sensitivity
Millivolt output range is determined by the sensor sensitivity
(mV/V) and the excitation voltage:
mV/V sensitivity X excitation voltage = total mV range
Input Impedance
200 kΩ typical
Common Mode Rejection
100 dB minimum
Calibration Resistor Options
M01 option: Switch with calibration resistor inside module.
Specify resistor value.
M02 option: Switch for external (load cell) calibration resistor.
Excitation Voltage
Switch Selectable: 0-10 VDC in 1 V increments
Maximum Output: 10 VDC maximum at 120 mA
Drive Capability:
Up to four 350 Ω bridges at 10 VDC
Fine Adjustment: ±5% via multi-turn potentiometer
Stability:
±0.01% per °C
Sense Lead Compensation
Better than ±0.01% per 1 Ω change in leadwire resistance
Maximum leadwire resistance: 10 Ω with 350 Ω at 10 VDC
LoopTracker
Variable brightness LEDs for input/output loop level and status
DC Output Ranges
Voltage (10 mA max.):
0-1 VDC
to 0-10 VDC
Bipolar Voltage (±10 mA max.): ±5 VDC
or ±10 VDC
Current:
0-2 mADC to 0-20 mADC
Compliance, drive at 20 mA:
20 V, 1000 Ω drive
Current output can be selectively wired for sink or source
Output Calibration
Multi-turn zero and span potentiometers
±15% of span adjustment range typical
Zero offset switch: ±100% of span in 15% increments
User’s Guide
Shop online at
omega.com
Output Test
Sets output to test level when pressed
Adjustable 0-100% of span
Not available with M01 or M02 options
Output Ripple and Noise
Less than 10 mVRMS ripple and noise
Linearity
Better than ±0.1% of span
Ambient Temperature Range and Stability
–10°C to +60°C operating ambient
Better than ±0.02% of span per °C stability
Response Time
70 milliseconds typical (14.2 Hz)
DF option: 10 millisecond (100 Hz) response time typical (output noise will exceed specifications)
Contact factory for custom response times
Isolation
1200 VRMS min.
Full isolation: power to input, power to output, input to output
Housing and Connectors
IP 40, requires installation in panel or enclosure
For use in Pollution Degree 2 Environment
Mount vertically to a 35 mm DIN rail
Four 4-terminal removable connectors
14 AWG max wire size
Dimensions
0.89" W x 4.62" H x 4.81" D
22.5 mm W x 117 mm H x 122 mm D
Height includes connectors
Power
Standard: 85-265 VAC, 50/60 Hz or 60-300 VDC
D option: 9-30 VDC (either polarity) or 10-32 VAC
Power:
2 to 5 Watts depending on number of load cells
e-mail: info@omega.com
For latest product manuals:
www.omegamanual.info
Lifetime
MADE IN
TM
Pb
Lead
Free
WARNING: This product can expose you to chemicals including nickel, which are known to the State of California to cause
cancer or birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
DMD4059 Series Strain Gauge to DC Isolated Transmitter
012
EF
1. Set Switch A for desired Excitation Voltage.
2. Set Switches B/C/D for desired Input / Output ranges.
3. Set Switch E for Voltage or Current as required.
4. Set Excitation / Zero / Span / Test Cal. Controls
Position
10V
9V
8V
7V
6V
5V
4V
3V
2V
1V
0V
A
9
8
7
6
5
4
3
2
1
0
INPUT
OUTPUT
0-
Voltage
5m
0- V
10
mV
020
mV
025
mV
030
mV
040
mV
050
mV
010
0m
020 V
0m
0V
25
0m
V
Excitation Switch
For more Details
and Instructions
see Data Sheet
Rotary Switches BCD BCD BCD BCD BCD BCD BCD BCD BCD BCD
0-1V
0-5V
1-5V
+/-5V
0-10V
+/-10V
4-20mA
BC D
Using Offset Switch C
Offset switch C allows canceling or taring of non-zero deadweights or other sensor offsets such as:
OO Compensate for tare weights or scale deadweight to get
zero output when a load is on the platform.
OO Compensate for low-output sensors (e.g., less than 1 mV/V)
that may have large zero offsets. Switch C can realign the
zero control so it has enough range to produce the desired
zero output.
OO Raising the offset to allow calibration of bipolar sensors
such as ±10 mV.
OO Lowering the offset to compensate for elevated input
ranges such as 10-20 mV.
200
209
206
204
203
205
207
A00
A09
A06
A04
A03
A05
A07
300
309
306
304
303
305
307
600
609
606
604
603
605
607
E00
E09
E06
E04
E03
E05
E07
B00
B09
B06
B04
B03
B05
B07
000
009
006
004
003
005
007
800
809
806
804
803
805
807
100
109
106
104
103
105
107
400
409
406
404
403
405
407
1. Switch C does not interact with
any other switch and is the
only switch needed to correct
zero offsets. Its only purpose
is to adjust or cancel effects of
the low end of the input range
not corresponding nominally
to 0 mV. Setting this switch to
“0” results in no offset.
2. To RAISE the output zero, rotate
switch C from “1” thru “7”,
until the Zero control can be set
for your application.
3. To LOWER the output zero,
rotate switch C from “9” thru
“F”, until the Zero control can
be set for your application.
4. After all switches are set,
repeat the calibration procedure.
EXAMPLE:
012
EF
BC D
012
90 1
EF
E
7 8
8 9A
Signal
Sig. Out –
Sig. Out +
Sense Lead
Sig. Input +
Exc. –
Sig. Input –
Exc. +
Power +
Power –
D
34 5
67
3
4
6
9
10
11
12
13
16
Output
V
I
Output
C
34 5
8 9A
Connections
Term. #
B
34 5
BC D
A
Offset
0-30mV IN, 4-20mA OUT: CODE 0E7
Set switch “B” to 0; “C” to E; “D” to 7
Input
4 56
Excitation
67
Output
Switches
Input
DMD4059
8 9A
I/O Range Selection B, C, D, E
1. From the table below, find the rotary switch combination that
matches your I/O ranges and set rotary switches B, C, and D.
2. Set switch E to "V" for voltage output or "I" for current output.
3. For ranges that fall between the listed ranges use the next
highest setting and trim the output signal with the zero and
span potentiometers as described in the Calibration section.
Strain Gauge to DC Isolated Transmitter
67
Range Selection
Rotary switches and a slide switches on the side of the module are
used to select input and output ranges to match your application.
Switch A: Excitation voltage
Switch B: Input range
Switch C: Input offset (see table on next page)
Switch D: Output range
Switch E : Set to "V" for voltage output or
Set to "I" for current output
It is generally easier to select ranges before installing the module
on the DIN rail. The tables below list available settings, ranges,
and offsets. The module side label lists common ranges.
Determine how much output in millivolts the load cell will produce at full load. Multiply the manufacturer's mV/V sensitivity
specification by the applied excitation voltage.
For example, a load cell rated for 3 mV/V sensitivity using 10
VDC excitation will produce an output of 0 to 30 mV for load
variations from 0 to 100%.
3 mV/V sensitivity X 10 VDC excitation = 30 mV range
Excitation Voltage Setup
Excitation Switch A
Refer to the sensor manufacA
10 V
turer's recommendations to
9
9V
determine what excitation voltage to use.
8
8V
Set Excitation rotary switch A to
7
7V
desired excitation voltage.
6
6V
After installation the excitation
5
5V
fine adjust potentiometer may
4
4V
be used to precisely trim this
3
3
V
voltage, if desired.
2
2V
1
1V
0
0V
2 3
2
Offset
Switch C
% of Span
7
105%
6
90%
5
75%
4
60%
3
45%
2
30%
1
15%
0
0%
9
–15%
A
–30%
B
–45%
C
–60%
D
–75%
E
–90%
F
–105%
0-1 V
0-2 V
0-4 V
1-5 V
0-5 V
0-8 V
2-10 V
0-10 V
±5 V
±10 V
0-2 mA 0-4 mA 0-8 mA 2-10 mA 0-10 mA 0-16 mA 4-20 mA 0-20 mA
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
BCDE
0-5 mV
200V
208V
201V
206V
209V
202V
207V
203V
204V
205V
200I
208I
201I
206I
209I
202I
207I
203I
0-10 mV
A00V
A08V
A01V
A06V
A09V
A02V
A07V
A03V
A04V
A05V
A00I
A08I
A01I
A06I
A09I
A02I
A07I
A03I
0-20 mV
300V
308V
301V
306V
309V
302V
307V
303V
304V
305V
300I
308I
301I
306I
309I
302I
307I
303I
0-25 mV
600V
608V
601V
606V
609V
602V
607V
603V
604V
605V
600I
608I
601I
606I
609I
602I
607I
603I
0-30 mV
E00V
E08V
E01V
E06V
E09V
E02V
E07V
E03V
E04V
E05V
E00I
E08I
E01I
E06I
E09I
E02I
E07I
E03I
0-40 mV
B00V
B08V
B01V
B06V
B09V
B02V
B07V
B03V
B04V
B05V
B00I
B08I
B01I
B06I
B09I
B02I
B07I
B03I
0-50 mV
000V
008V
001V
006V
009V
002V
007V
003V
004V
005V
000I
008I
001I
006I
009I
002I
007I
003I
0-100 mV
800V
808V
801V
806V
809V
802V
807V
803V
804V
805V
800I
808I
801I
806I
809I
802I
807I
803I
0-120 mV
F00V
F08V
F01V
F06V
F09V
F02V
F07V
F03V
F04V
F05V
F00I
F08I
F01I
F06I
F09I
F02I
F07I
F03I
0-200 mV
100V
108V
101V
106V
109V
102V
107V
103V
104V
105V
100I
108I
101I
106I
109I
102I
107I
103I
0-250 mV
400V
408V
401V
406V
409V
402V
407V
403V
404V
405V
400I
408I
401I
406I
409I
402I
407I
403I
0-300 mV
C00V
C08V
C01V
C06V
C09V
C02V
C07V
C03V
C04V
C05V
C00I
C08I
C01I
C06I
C09I
C02I
C07I
C03I
0-400 mV
900V
908V
901V
906V
909V
902V
907V
903V
904V
905V
900I
908I
901I
906I
909I
902I
907I
903I
Electrical Connections
Check white model/serial number label for module operating
voltage to make sure it matches available power.
WARNING! All wiring must be performed by a qualified electrician or instrumentation engineer. See diagram at right for
terminal designations and wiring examples.
Avoid shock hazards! Turn signal input, output, and power off
before connecting or disconnecting wiring. Connect I/O wiring
before power wiring.
Module Power Terminals
When using DC power, either polarity is acceptable, but for
consistency with similar products, positive (+) can be wired to
terminal 13 and negative (–) can be wired to terminal 16.
Signal Input Terminals
Connect up to 4 strain gauges or load cells. See manufacturer’s
specifications for wiring designations and wire color-coding.
Polarity must be observed when connecting inputs.
CAUTION: Never short the excitation leads together. This will
cause internal damage to the module.
Some bridges may have one or two sense leads. See manufacturer’s specifications. Sense leads allow the DMD4059 to
compensate for leadwire resistance effects. Observe polarity
when connecting sense leads.
If no sense lead is used, jumper sense (+) terminal 6 and excitation (+) 12.
Calibration should be done after all connections are made.
Signal Output Terminals
Polarity must be observed when connecting the signal output.
The DMD4059 output can be wired to provide either a sinking
or sourcing mA output. If your device accepts a current input,
determine if it provides power to the current loop or if it must be
powered by the DMD4059 module.
Use a multi-meter to check for voltage at your device’s input
terminals. Typical voltage may be 9-24 VDC. See the wiring
diagram for the appropriate connections.
DMD4059 Series Strain Gauge to DC Isolated Transmitter
Output Wiring
4-20 mA
Device
Ri
Current sinking output
Loop +
switch E set to “I”
Power
External device provides
–
power to output loop Source
1
+
–
–
+
2
Device Connected to Output Terminal Terminal Switch E
3
4
Passive
4-20 mA
Device
Ri
Current sourcing output
switch E set to “I”
+20 V at terminal 4
–
1
2
+20V
3
4
Voltage
Device
Voltage output
switch E set to “V”
–
1
No Sense Leads
2
+
3
4
Jumper 6 to 12 ONLY if
sense leads are NOT used
5
6
7
8
OMEGA Engineering, Inc.
Exc +
Excitation
VEX +
Output
LED
Test Cal.
V0 +
Sig
+
Span
VEX –
Input
LED
Zero
Strain Gauge to DC
Isolated Transmitter
6
Sense +
Sig –
5
With Sense Leads
Sensor shield wire
(if equipped) should be
grounded at one end only
Sense +
Excitation
Test Cal.
Sig
+
VEX –
Zero
Sig +
Power AC or DC +
Earth Ground
Power AC or DC –
Input
LED
DMD4059
9
Module Power
LED
Strain Gauge to DC
Isolated Transmitter
10 11 12
Sense –
Exc –
Sense –
Output
Test
Span
13
14
16
8
Sig –
VEX +
Exc –
7
OMEGA Engineering, Inc.
Exc +
V0 +
Exc +
Sig +
10 11 12
Exc –
9
Strain
Gauge
V
Passive mA (current) input.
Module provides loop power
3 (–)
4 (+20 V)
I
mA (current) input device that
provides loop power.
2 (–)
3 (+)
I
Output 1 2 3 4
Cal. and Sense
5 6 7 8
To avoid damage
to the module,
do not make any
connections to
unused terminals
Wire terminal
torque
0.5 to 0.6 Nm or
4.4 to 5.3 in-lbs
9 10 11 12
Power 13 14 15 16
Excitation Voltage Trim
Variable Brightness Output Indicator
Output Test Level Adjust
Push to Test Output
Output Span Calibration
Variable Brightness Input Indicator
Output Zero Calibration
DMD4059
Exc –
Sig
– V0 –
4 (+)
Test
Exc +
Strain
Gauge
3 (–)
Input
Sensor shield wire
(if equipped) should be
grounded at one end only
Sig
– V0 –
Voltage input
13 14 15 16
Calibration
The Zero, Span, and Excitation potentiometers are used to
calibrate the output.
Note: Perform the following calibration procedure any time
switch settings are changed.
This calibration procedure does not account for offsets or tare
weights. If your system has an offset, tare weight or deadweight,
refer to the "Using Offset Switch C" procedure.
To achieve optimum results, the system should be calibrated
using an accurate bridge simulator, pressure calibrator, or calibration weights depending on the application.
1. Apply power to the module and allow a minimum 20 minute
warm up time.
2. Using an accurate voltmeter across terminals 10 and 12,
adjust the excitation voltage potentiometer for the exact voltage desired.
3. Provide an input to the module equal to zero or the minimum
input required for the application (for example, 4 mA for a
4-20 mA output or –10 V with a ±10V output).
4. Using an accurate measurement device for the module
output, adjust the Zero potentiometer for the exact minimum output signal desired. The Zero control should only be
adjusted when the input signal is at its minimum.
5. Set the input at maximum, and then adjust the Span pot for
the exact maximum output desired. The Span control should
only be adjusted when the input signal is at its maximum.
6. Repeat the zero and span calibration for maximum accuracy.
3
Output Test Function
When the test button is depressed it will drive the output with a
known good signal that can be used as a diagnostic aid during
initial start-up or troubleshooting. When released, the output will
return to normal.
The Test Cal. potentiometer can be used to set the test output
to the desired level. It is adjustable from 0 to 100% of the
output span.
Press and hold the Test button and adjust the Test Cal. potentiometer for the desired output level.
Installation Precautions
WARNING! Avoid shock hazards! Turn signal input, output, and
power off before connecting or disconnecting wiring, or removing or installing module.
Mounting to a DIN Rail
The housing clips to a standard 35 mm DIN rail. The housing is
IP40 rated and requires a protective panel or enclosure.
Do not block air flow. Allow 1” (25 mm) above and below housing vents for air circulation.
1. Tilt front of module downward and position against DIN rail.
2. Clip lower mount to bottom edge of DIN rail.
3. Push front of module upward until upper mount snaps into
place.
Removal
1. Push up on the bottom back of the module.
2. Tilt front of module downward to release upper mount from
top edge of DIN rail.
3. The module can now be removed from the DIN rail.
Operation
Strain gauges and load cells are normally passive devices that
are commonly referred to as “bridges” due to their four-resistor
Wheatstone bridge configuration. These sensors require a
precise excitation source to produce an output that is directly
proportional to the load, pressure that is applied to the sensor.
The exact output of the sensor (measured in millivolts) is determined by the sensitivity of the sensor (mV/V) and the excitation
voltage applied.
An additional input, the sense lead, monitors the voltage drop in
the sensor leads and automatically compensates the excitation
voltage at the module in order to maintain a constant excitation
voltage at the sensor.
The DMD4059 provides the excitation voltage to the sensors and
receives the resulting millivolt signal in return. This input signal
is filtered and amplified, then offset, if required, and passed
to the output stage. Depending on the output configuration
selected, a DC voltage or current output is generated.
The green input LED provides a visual indication that a signal
is being sensed by the input circuitry of the module. It also
indicates the input signal strength by changing in intensity as
the process changes from minimum to maximum.
If the LED fails to illuminate, or fails to change in intensity as
the process changes, check the module power or signal input
wiring. Note that it may be difficult to see the LEDs under bright
lighting conditions.
The red output LED provides a visual indication that the output
signal is functioning. It becomes brighter as the input and the
corresponding output change from minimum to maximum.
For current outputs, the red LED will only light if the output loop
current path is complete. For either current or voltage outputs,
failure to illuminate or a failure to change in intensity as the
process changes may indicate a problem with the module power
or signal output wiring.
Diagnostic Voltage Measurements
Using a meter with at least 10 megaohm input impedance, measure the voltage coming from the strain gauge at the locations shown.
Sensitivity is measured in mV/V.
Positive
Negative
Meter Reading
Meter Reading
Meter Lead
Meter Lead
No pressure/load
Full pressure/load
+ Exc.
– Exc.
Excitation Voltage
Excitation Voltage
+ Sig.
– Exc.
+ ½ Excitation Voltage
½ Excitation Voltage + (½ x Excitation Voltage x Sensitivity)
– Sig.
– Exc.
+ ½ Excitation Voltage
½ Excitation Voltage – (½ x Excitation Voltage x Sensitivity)
+ Sig.
– Sig.
Zero Volts
Excitation Voltage x Sensitivity
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for
any damages that result from the use of its products in accordance with information provided
by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED
RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR NON-WARRANTY REPAIRS, consult
FOR WARRANTY RETURNS, please have the
OMEGA for current repair charges. Have
following information available BEFORE contacting
the following information available BEFORE
OMEGA:
contacting OMEGA:
1.Purchase Order number under which the product
1. Purchase Order number to cover the COST
was PURCHASED,
of the repair,
2.Model and serial number of the product under
2. Model and serial number of the product, and
warranty, and
3. Repair instructions and/or specific problems
3. Repair instructions and/or specific problems
relative to the product.
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2017 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
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