User Manual - American Control Electronics

User Manual - American Control Electronics
TM
LGC SERI ES
USER MANUAL
LGC 400- 1. 5
LGC 400- 1. 5-QDT
LGC 400- 10
LGC 400- 10-QDT
LGC 410- 1. 5
LGC 410- 10
LGC 430- 1. 5
LGC 430- 10
LGC 440- 1. 5
LGC 440- 10
www.americancontrolelectronics.com
Dear Valued Consumer:
Congratulations on your purchase of the LGC Series drive.
This User Manual was created for you to get the most out of
your new device and assist with the initial setup. Please visit
www.americancontrolelectronics.com to learn more about our
other drives.
Thank you for choosing American Control Electronics!
No part of this document may be reproduced or transmitted in any form without written permission
from American Control Electronics®. The information and technical data in this document are
subject to change without notice. American Control Electronics® makes no warranty of any kind with
respect to this material, including, but not limited to, the implied warranties of its merchantability
and fitness for a given purpose. American Control Electronics® assumes no responsibility for any
errors that may appear in this document and makes no commitment to update or to keep current
the information in this document.
LGC Series
Safety First!
SAFETY WARNINGS

!
WARNING!
Text in gray boxes denote important safety tips or warnings.
Please read these instructions carefully before performing any of
the procedures contained in this manual.
• DO NOT INSTALL, REMOVE, OR REWIRE THIS EQUIPMENT WITH
POWER APPLIED. Have a qualified electrical technician install, adjust
and service this equipment. Follow the National Electrical Code
and all other applicable electrical and safety codes, including the
provisions of the Occupational Safety and Health Act (OSHA), when
installing equipment.
• Reduce the chance of an electrical fire, shock, or explosion by using
proper grounding techniques, over-current protection, thermal
protection, and enclosure. Follow sound maintenance procedures.

!
WARNING!
It is possible for a drive to run at full speed as a result of a
component failure. American Control Electronics strongly
recommends the installation of a master switch in the main
power input to stop the drive in an emergency.
Circuit potentials are at 115 VAC or 230 VAC above earth ground.
Avoid direct contact with the printed circuit board or with circuit
elements to prevent the risk of serious injury or fatality. Use a
non-metallic screwdriver for adjusting the calibration trim pots.
Use approved personal protective equipment and insulated tools
if working on this drive with power applied.
i
LGC Series
Table of Contents
Section 1. Specifications...................................................... 1
Section 2. Dimensions.. ........................................................ 3
Section 3. Installation. . ...................................................... 10
Heat Sinking.................................................................................10
Mounting.....................................................................................11
Chassis.................................................................................11
Speed Adjust Potentiometer..............................................12
NEMA 1................................................................................13
NEMA 4X..............................................................................14
Wiring..........................................................................................15
Shielding Guidelines.............................................................16
Line Fusing...........................................................................17
Connections.................................................................................19
Quick-Disconnect Terminal Block...........................................19
Power Input. . ........................................................................21
Motor.. .................................................................................21
Field Output Connections. . ....................................................22
Speed Adjust Potentiometer. . ................................................23
Meter (-MHB models only)....................................................23
Analog Input Signal...............................................................24
Section 4. Operation. . ........................................................ 28
Before Applying Power..................................................................28
Select Switches.............................................................................29
Input Voltage Select (SW501)................................................29
Armature Voltage Select (SW502)..........................................29
Startup.........................................................................................30
LGC400-1.5, LGC400-1.5-QDT, LGC400-10, LGC400-10-QDT.....30
LGC410-1.5, LGC410-10, LGC440-1.5, LGC440-10....................30
LGC430-1.5 and LGC430-10 .. .................................................31
Starting and Stopping Methods.....................................................32
ii
LGC Series
Line Starting and Stopping....................................................32
Dynamic Braking...................................................................33
Inhibit Terminals. . .................................................................35
Decelerating to Minimum Speed. . ..........................................36
Section 5. Calibration........................................................ 37
Minimum Speed (MIN SPD)...........................................................38
Maximum Speed (MAX SPD)..........................................................38
Torque (TORQUE)..........................................................................39
IR Compensation (IR COMP)..........................................................40
Acceleration (ACCEL). . ...................................................................42
Deceleration (DECEL)....................................................................42
Section 6.Application Notes................................................ 43
Multiple Fixed Speeds...................................................................43
Adjustable Speeds Using Potentiometers In Series . . ........................44
Independent Adjustable Speeds.. ...................................................45
RUN/JOG Switch - Inhibit Connection. . ...........................................46
RUN/JOG Switch - Potentiometer Connection. . ...............................47
Leader-Follower Application..........................................................48
Single Speed Potentiometer Control Of Multiple Drives..................49
Reversing.. ....................................................................................50
Section 7. Diagnostic LEDs.. ................................................ 51
Section 8. Troubleshooting. . ............................................... 52
Before Troubleshooting.................................................................52
Section 9. Block Diagrams.................................................. 55
Section 10. Accessories & Replacement Parts...................... 58
Unconditional Warranty.. .................................................... 59
iii
LGC Series
List of Tables
Table
Table
Table
Table
iv
1
2
3
3
Recommended Line Fuse Sizes...........................................18
Short Circuit Current Ratings.............................................18
Field Output Connections..................................................22
Minimum Recommended Dynamic Brake Resistor Values....34
LGC Series
List of Figures
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
LGC400-1.5 and LGC400-10 Dimensions.............................. 3
LGC400-1.5-QDT and LGC400-10-QDT Dimensions............... 4
LGC410-1.5 and LGC410-10 Dimensions.............................. 5
LGC430-1.5 and LGC430-10 Dimensions.............................. 6
LGC440-1.5 and LGC440-10 Dimensions.............................. 7
HSK-0001 Dimensions . . ....................................................... 8
HSK-0002 Dimensions . . ....................................................... 9
Speed Adjust Potentiometer..............................................12
Quick-Disconnect Terminal Block.......................................20
Analog Input Signal Connections. . ......................................24
Chassis Drive Connections.................................................25
LGC400-1.5.-QDT and LGC400-10-QDT Connections............26
Cased Drive Connections...................................................27
Select Switches.................................................................29
Dynamic Brake Wiring.......................................................34
Inhibit Terminals...............................................................35
Run/Decelerate to Minimum Speed Switch. . .......................36
Recommended TORQUE and IR COMP Settings...................41
Multiple Fixed Speeds.......................................................43
Adjustable Speeds Using Potentiometers in Series..............44
Independent Adjustable Speeds. . .......................................45
RUN/JOG Switch - Inhibit Connection.................................46
RUN/JOG Switch - Potentiometer Connection.....................47
Leader-Follower Application..............................................48
Single Speed Potentiometer Control of Multiple Drives. . .....49
Reversing Circuit Wiring....................................................50
Diagnostic LED Locations...................................................51
LGC Series Block Diagram..................................................55
v
LGC Series
Figure 29
Figure 30
vi
LGC410-1.5, LGC410-10, LGC440-1.5, and LGC440-10
Terminal Block Connections...............................................56
LGC430-1.5 and LGC430-10 Terminal Block Connections.. ....57
LGC Series
Section 1. Specifications
Maximum
Armature
Current (ADC)
HP Range
with 90 VDC
Motor
HP Range
with 180 VDC
Motor
LGC400-1.5
LGC400-1.5-QDT
LGC410-1.5
LGC430-1.5
LGC440-1.5
1.5
1/20 - 1/8
1/10 - 1/4
Chassis
Chassis
NEMA 1
NEMA 1
NEMA 4X
LGC400-10*
LGC400-10-QDT*
LGC410-10**
LGC430-10**
LGC440-10
10.0
1/8 - 1
1/4 - 2
Chassis
Chassis
NEMA 1
NEMA 1
NEMA 4X
Model
Enclosure
* Heat sink kit part number HSK-0001 must be used when the continuous
current output is over 5 amps.
** Heat sink kit part number HSK-0002 must be used when the continuous
current output is over 5 amps.
AC Line Voltage
115/230 VAC ± 10%
50/60 Hz, single phase
DC Armature Voltage
with 115 VAC Line Voltage
with 230 VAC Line Voltage
0 - 90 VDC
0 - 180 VDC
Field Voltage
with 115 VAC Line Voltage
with 230 VAC Line Voltage
50 VDC (F1 to L1); 100 VDC (F1 to F2)
100 VDC (F1 to L1); 200 VDC (F1 to F2)
Maximum Field Current
1 ADC
Acceleration Time Range
for 0 - 90 VDC Armature Voltage
for 0 - 180 VDC Armature Voltage
0.5 - 11 seconds
0.5 - 22 seconds
Deceleration Time Range
for 0 - 90 VDC Armature Voltage
for 0 - 180 VDC Armature Voltage
coast to a stop - 13 seconds
coast to a stop - 25 seconds
1
LGC Series
Analog Input Range
(signal must be isolated; S1 to S2)
with 115 VAC Line Voltage
with 230 VAC Line Voltage
0 - 1.4 VDC
0 - 2.8 VDC
Input Impedance (S1 to S2)
>100K ohms
Form Factor
1.37 at base speed
Load Regulation
1% base speed or better
Speed Range
60:1
Vibration
0.5G maximum (0 - 50 Hz)
0.1G maximum (> 50 Hz)
Safety Certifications
UL/cUL Listed Equipment, File # E132235
UL/cUL Overload Protection (except -Q models)
CSA Certified Component, File # LR41380
Ambient Temperature Range
Chassis Drive
Cased Drive
10°C - 55°C
10°C - 40°C
Suffix Definitions
2
-CFC:
Conformal Coating
-FLA:
Fuse Clips for L1 and A1 on chassis models
-FLL:
Fuse Clips for L1 and L2 on chassis models
-MHB:
-QDT:
Power LED and Quick Disconnect Terminal Block
-VRT:
Power LED and Vertical Trim Pots
Inhibit Style Connector for Meter
LGC Series
Section 2. Dimensions
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Figure 1. LGC400-1.5 and LGC400-10 Dimensions
3
LGC Series
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Figure 2. LGC400-1.5-QDT and LGC400-10-QDT Dimensions
4
LGC Series
6.00 [125]
40
I
50
60
30
70
20
80
CL
2.50
[64]
2.50
[64]
90
10
100
0
8.00
[203]
Ø 0.19
[5] (4)
1.79
[45]
POWER
NEMA 1
DC
MOTOR
CONTROL
5.00
[127]
MADE IN THE U.S.A.
WARNING: DISCONNECT FROM SUPPLY BEFORE OPENING THIS COVER.
SEPARATE MOTOR OVERCURRENT AND OVERLOAD PROTECTION IN ACCORDANCE WITH
THE CANADIAN ELECTRICAL CODE PART 1 IS PROVIDED BY OTHERS.
Ø 0.88
[22] (2)
3.46
[88]
2.75
[70]
1.25 [32]
1.72
[44]
2.50
[64]
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Figure 3. LGC410-1.5 and LGC410-10 Dimensions
5
LGC Series
6.00 [125]
RUN
POWER
1.79
[45]
Ø 0.19
[5] (4)
C
L
2.50
[64]
BRAKE
I
FORWARD
WARNING!
ALLOW MOTOR TO STOP
BEFORE REVERSING
0
8.00 [203]
REVERSE
5.00
[127]
MADE IN THE U.S.A.
WARNING: DISCONNECT FROM SUPPLY BEFORE OPENING THIS COVER.
SEPARATE MOTOR OVERCURRENT AND OVERLOAD PROTECTION IN ACCORDANCE WITH
THE CANADIAN ELECTRICAL CODE PART 1 IS PROVIDED BY OTHERS.
Ø 0.88
[22] (2)
3.46 [88]
2.75
[70]
1.25 [32]
1.72
[44]
2.50
[64]
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Figure 4. LGC430-1.5 and LGC430-10 Dimensions
6
2.50
[64]
LGC Series
6.90 [175]
6.30 [160]
POWER
0.87 [22]
SPEED
50
a
I
0
NEMA 4X
DC
MOTOR
CONTROL
8.20 [208]
7.76 [197]
6.00 [152]
MADE IN THE U.S.A.
WARNING: DISCONNECT FROM SUPPLY BEFORE OPENING THIS COVER.
SEPARATE MOTOR OVERCURRENT AND OVERLOAD PROTECTION IN ACCORDANCE WITH
THE CANADIAN ELECTRICAL CODE PART 1 IS PROVIDED BY OTHERS.
4.50 [114]
Ø 0.88
[22] (2)
3.70 [94]
2.25 [57]
0.13 [3]
2.50 [64]
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Figure 5. LGC440-1.5 and LGC440-10 Dimensions
7
LGC Series
6.90 [175]
6.30 [160]
5.90 [150]
0.7 [18]
4.40 [112]
3.00 [76]
1.75 [44]
3.90 [100]
0.125 [3]
1.00 [26]
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Figure 6. HSK-0001 Dimensions
8
LGC Series
6.90 [175]
6.29 [160]
5.90 [150]
0.90 [23]
7.80 [198]
6.00 [152]
0.19 [5]
0.125 [3]
1.00 [26]
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Figure 7. HSK-0002 Dimensions
9
LGC Series
Section 3. Installation

!
WARNING!
Do not install, rewire, or remove this control with input power
applied. Failure to heed this warning may result in fire, explosion,
or serious injury. Make sure you read and understand the Safety
Precautions on page i before attempting to install this product.
Heat Sinking
Chassis
Models LGC400-10 and LGC400-10-QDT require an additional heat sink
when the continuous armature current is above 5 amps. Use heat sink
kit part number HSK-0001. All other chassis drives have sufficient heat
sinking in their basic configuration. Use a thermally conductive heat sink
compound (such as Dow Corning® 340 Heat Sink Compound) between
the chassis and the heat sink surface for optimum heat transfer.
NEMA 1
Models LGC410-10 and LGC430-10 require an additional heat sink
when the continuous armature current is above 5 amps. Use heat sink
kit part number HSK-0002. All other NEMA 1 drives have sufficient heat
sinking in their basic configuration. Use a thermally conductive heat sink
compound (such as Dow Corning® 340 Heat Sink Compound) between
the chassis and the heat sink surface for optimum heat transfer.
NEMA 4X
All NEMA 4X models come with the heat sink already attached.
Therefore, all NEMA 4X drives have sufficient heat sinking in their basic
configuration.
10
LGC Series
Mounting
Chassis
• Drive components are sensitive to electrostatic discharge. Avoid
direct contact with the circuit board. Hold the drive by the chassis
or heat sink only.
• Protect the drive from dirt, moisture, and accidental contact.
• Provide sufficient room for access to the terminals and calibration
trim pots.
• Mount the drive away from heat sources. Operate the drive within
the specified ambient operating temperature range.
• Prevent loose connections by avoiding excessive vibration of the
drive.
• Mount the drive with its board in either a horizontal or vertical
plane. Eight 0.19” (5 mm) wide slots in the chassis accept #8 pan
head screws. Fasten either the large base or the narrow flange of
the chassis to the subplate.
• The chassis should be earth grounded. Use a star washer beneath
the head of at least one of the mounting screws to penetrate the
anodized surface and to reach bare metal.
11
LGC Series
Speed Adjust Potentiometer

!
WARNING!
Be sure that the potentiometer tabs do not make contact with the
potentiometer’s body. Grounding the input will cause damage to
the drive.
If using a remote potentiometer with a chassis drive, mount the speed
adjust potentiometer through a 0.38 in. (10 mm) hole with the hardware
provided (Figure 8). Install the circular insulating disk between the panel
and the 10K ohm speed adjust potentiometer.
Twist the speed adjust potentiometer wire to avoid picking up unwanted
electrical noise. If the speed adjust potentiometer wires are longer than
18 in. (46 cm), use shielded cable. Keep the speed adjust potentiometer
wires separate from power leads (L1, L2, A1, A2, F1, F2).
MOUNT THROUGH A 0.38 IN. (10 MM) HOLE
CW
WIPER
CCW
NUT
STAR
WASHER
SPEED ADJUST
POTENTIOMETER
INSULATING DISK
POT TAB ASSIGNMENTS
PANEL
Figure 8. Speed Adjust Potentiometer
12
LGC Series
Mounting (NEMA 1 Enclosures)
NEMA 1 cased drives come with two 0.88 inch (22 mm) conduit holes
at the bottom of the case. The units may be vertically wall mounted or
horizontally bench mounted using the three keyholes on the back of the
case.
1.
For access to the keyholes and the terminal strip, remove
the two screws from the front of the case by turning them
counterclockwise. Grasp the front cover and pull it straight out.
2.
Install the mounting screws in the three keyholes.
3.
Set the POWER switch to the OFF position before applying the
AC line voltage.
4.
Install conduit hardware through the conduit holes at the
bottom of the case. Connect external wiring to the terminal
block.
5.
Reinstall the front cover. Avoid pinching any wires between the
front cover and the case.
6. Reinstall the two screws on the front cover. Turn the screws
clockwise to tighten.
13
LGC Series
Mounting (NEMA 4X Enclosures)
NEMA 4X cased drives come with two 0.88 inch (22 mm) conduit
knockout holes at the bottom of the case. The units may be vertically wall
mounted using the four 0.19 inch (5 mm) slotted holes on the attached
heat sink. For motor loads less than 5 ADC, the drive may be bench
mounted horizontally or operated without mounting.
1.
Install the mounting screws.
2.
For access to the terminal strip, turn the slotted screw on the
front cover counterclockwise until it is free from the case. The
right side of the cover is hinged to the case. Pull the slotted
screw to open the case.
3. Carefully remove the conduit knockouts by tapping them into
the case and twisting them off with pliers.
4.
Set the POWER switch to the OFF position before applying the
AC line voltage.
5. Install conduit hardware through the 0.88 inch (22 mm)
knockout holes. Connect external wiring to the terminal block.
6. Grasp the slotted screw and tilt the front cover back into place.
Avoid pinching any wires between the front cover and the case.
7. Turn the slotted screw clockwise until tight to secure the front
cover.
14
LGC Series
Wiring

!
WARNING!
Do not install, rewire, or remove this control with input power
applied. Failure to heed this warning may result in fire, explosion,
or serious injury.
Circuit potentials are at 115 or 230 VAC above ground. To prevent
the risk of injury or fatality, avoid direct contact with the printed
circuit board or with circuit elements.
Do not disconnect any of the motor leads from the drive unless
power is removed or the drive is disabled. Opening any one
motor lead while the drive is running may destroy the drive.
This product does not have internal solid state motor overload
protection. It does not contain speed-sensitive overload
protection, thermal memory retention or provisions to receive
and act upon signal from remote devices for over temperature
protection. If motor over protection is needed in the end-use
product, it needs to be provided by additional equipment in
accordance with NEC standards.
• Use 18 - 24 AWG wire for logic wiring. Use 14 - 16 AWG wire for
AC line and motor wiring.
15
LGC Series
Shielding Guidelines

!
WARNING!
Under no circumstances should power and logic level leads be
bundled together. Induced voltage can cause unpredictable
behavior in any electronic device, including motor controls.
As a general rule, it is recommended to shield all conductors. If it is not
practical to shield power conductors, it is recommended to shield all
logic-level leads. If shielding of all logic-level leads is not practical, the
user should twist all logic leads with themselves to minimize induced
noise.
It may be necessary to earth ground the shielded cable. If noise is
produced by devices other than the drive, ground the shield at the drive
end. If noise is generated by a device on the drive, ground the shield at
the end away from the drive. Do not ground both ends of the shield.
If the drive continues to pick up noise after grounding the shield, it may
be necessary to add AC line filtering devices, or to mount the drive in a
less noisy environment.
Logic wires from other input devices, such as motion controllers and PLL
velocity controllers, must be separated from power lines in the same
manner as the logic I/O on this drive.
16
LGC Series
Line Fusing
Chassis drives should be fused for protection. Use fast acting fuses rated
for 250 VAC or higher and 150% of maximum armature current. Fuse
HOT L1 only when the line voltage is 115 VAC. Fuse both L1 and L2 when
the line voltage is 230 VAC. Table 1 on page 18 lists the recommended
line fuse sizes.
Cased models come with preinstalled fuses. Models LGC400-10, LGC43010, and LGC440-10 are preinstalled with 15 amp fuses. Models LGC4101.5, LGC430-1.5, and LGC440-1.5 are preinstalled with 3 amp fuses.
Preinstalled line fuses are rated for maximum horsepower. If the
horsepower rating of the motor being used is less than the maximum
horsepower rating of the drive, the line fuse may have to be replaced
with a lower rated one. Fuses should be rated for 250 VAC or higher and
approximately 150% of the maximum armature current. Refer to Table 1
on page 18 to install a lower rated fuse.
Refer to Table 2 on page 18 for Short Circuit Current Ratings (SCCR).
17
LGC Series
Table 1. Recommended Line Fuse Sizes
90 VDC
Motor
Horsepower
180 VDC
Motor
Horsepower
Maximum DC
Armature Current
(amps)
AC Line
Fuse Size
(amps)
1/20
1/15
1/8
1/6
1/10
1/8
1/4
1/3
0.5
0.8
1.5
1.7
1
1.5
3
3
1/4
1/2
2.5
5
1/3
1/2
3/4
1
3/4
1
1 1/2
2
3.5
5.0
7.5
10
8
10
15
15
See Section 10: Accessories and Replacement Parts for fuse kit part
numbers.
Table 2. Short Circuit Current Ratings
Short Circuit Current Rating
Drive Model
Maximum
Current, A
Maximum
Voltage, V
10,000
240 V
Types of Branch
Circuit Protection
LGC400-10
LGC410-10
LGC430-10
LGC440-10
18
Non-time
Delay
K5 Fuse
Inverse
Time
Circuit
Breaker
Maximum
Rating of
Overcurrent
Protection
30 A
LGC Series
Connections

!
WARNING!
Do not connect this equipment with power applied. Failure to
heed this warning may result in fire, explosion, or serious injury.
American Control Electronics strongly recommends the
installation of a master power switch in the voltage input line,
as shown in Figures 11 and 12 (page 25 and 26). The switch
contacts should be rated at a minimum of 200% of motor
nameplate current and 250 volts. This power switch is provided
with NEMA 1 and NEMA 4X models.
Quick-Disconnect Terminal Block (-QDT Drives Only)
The quick-disconnect terminal block, found only on -QDT drives, is
composed of a 9-pin header block and 9-screw terminal plug (Figure 9 on
page 20). Refer to Figure 12 on page 26 for connection diagram. To use
the quick-disconnect terminal block:
1.
Carefully pull terminal plug from header block.
2. With a small flat-head screwdriver, turn terminal plug screw
counterclockwise to open wire clamp.
3. Insert stripped wire into the large opening in front of the plug.
4. Turn the terminal plug screw clockwise to clamp the wire.
5. Repeat steps 2–4 for each terminal until all connections are
made. Make no connections to F1 and F2 if using a permanent
magnet motor.
6. Insert plug into header until securely fastened.
19
LGC Series
Header Block
(mounted on the drive)
Terminal Plug
Figure 9. Quick-Disconnect Terminal Block
20
LGC Series
Power Input
For chassis models, connect the AC line power leads to terminals L1
and L2. American Control Electronics recommends the use of a singlethrow, double-pole master power switch. The switch should be rated at
a minimum of 250 volts and 200% of motor current. Refer to Figures 11
and 12 on pages 25 and 26.
For enclosed models, connect the AC line power leads to screw terminals
1 (L1) and 2 (L2 115) if using a 115 VAC line or to terminals 1 (L1) and 3 (L2
230) if using a 230 VAC line. Refer to Figure 13 on page 27.
Motor
Drives supply motor armature voltage from A1 and A2 terminals. It is
assumed throughout this manual that, when A1 is positive with respect
to A2, the motor will rotate clockwise (CW) while looking at the output
shaft protruding from the front of the motor. If the motor does not
spin in the desired direction, remove power and reverse the A1 and A2
connections.
For chassis models, connect a DC motor to terminals A1 and A2 as shown
in Figure 11 on page 25. For enclosed models, connect a DC motor to
terminals 5 (A1) and 4 (A2) as shown in Figure 13 on page 27. Ensure that
the motor voltage rating is consistent with the drive’s output voltage.
21
LGC Series
Field Output Connections

!
WARNING!
The field output is for shunt wound motors only. Do not make
any connections to F1 and F2 when using a permanent magnet
motor.
See Table 3 for field output connections. Use 14 - 16 AWG wire to
connect the field output to a field / shunt wound motor.
Table 3. Field Output Connections
22
Line Voltage
(VAC)
Approximate Field
Voltage (VDC)
Connect Motor Field To..
Chassis (Enclosure)
115
115
230
230
50
100
100
200
F1 and L1 (Terminals 7 & 1)
F1 and F2 (Terminals 7 & 6)
F1 and L1 (Terminals 7 & 1)
F1 and F2 (Terminals 7 & 6)
LGC Series
Speed Adjust Potentiometer
For chassis models, use a 10K ohm, 1/4 W potentiometer for speed
control. Connect the counter-clockwise end of the potentiometer to S1,
the wiper to S2, and the clockwise end to S3. If the potentiometer works
inversely of the desired functionality (e.g. to increase motor speed you
must turn the potentiometer counterclockwise), power off the drive and
swap the S1 and S3 connections. Refer to Figure 11 on page 25.
For enclosed models, the speed adjust potentiometer is factory installed
and prewired.
Meter (-MHB models only)
To supply power to external devices, the METER header block can supply
an non-isolated unregulated +9 VDC (5mA) signal when the motor and
the power supply of the drive are fully loaded. More current is available
with less motor loading. METER can supply an unregulated +15V (10 mA)
signal in typical applications.
23
LGC Series
Analog Input Signal
Instead of using a speed adjust potentiometer, the drive may be wired to
follow an analog input voltage signal that is isolated from earth ground
(Figure 10). Connect the signal common (–) to S1. Connect the signal
reference (+) to S2. Make no connection to S3. A potentiometer can
be used to scale the analog input voltage. An interface device, such as
American Control Electronics model ISO202-1, may be used to scale and
isolate an analog input voltage.
With 115 VAC line voltage, an analog input voltage range of 0–1.4 VDC is
required to produce an armature voltage range of 0–90 VDC. With 230
VAC line voltage, an analog input voltage range of 0–2.8 VDC is required
to produce an armature voltage range of 0–180 VDC.
SIGNAL INPUT (+)
SIGNAL COMMON (-)
S2
S1
Figure 10. Analog Input Signal Connections
24
LGC Series
FIELD COILS
(SEE FIELD OUTPUT
SECTION FOR
CONNECTIONS)
NOTE: DO NOT make
any connections to
F1 and F2 if using a
permanent magnet motor.
MOTOR
FUSE
*FUSE
POWER
SWITCH
CW
AC LINE
VOLTAGE
115/230 VAC
10K OHM
SPEED ADJUST
POTENTIOMETER
* NOTE: Do not add fuse to L2
unless input voltage is 230 VAC.
Figure 11. Chassis Drive Connections
25
LGC Series
CONNECT TO HEADER BLOCK
A1
A2
L1
L2
FUSE
F1
F2
S1
S2
S3
*FUSE
MOTOR
ARMATURE
CW
POWER
SWITCH
10K OHM
SPEED ADJUST
POTENTIOMETER
* NOTE: Do not add fuse to L2
unless input voltage is 230 VAC.
NOTE: DO NOT make
any connections to
F1 and F2 if using a
permanent magnet motor.
FIELD OUTPUT
(SHUNT WOUND
MOTORS ONLY)
WITH 115 VAC INPUT
CONNECT TO L1 FOR 50 VOLT FIELD.
CONNECT TO F2 FOR 100 VOLT FIELD.
WITH 230 VAC INPUT
CONNECT TO L1 FOR 100 VOLT FIELD.
CONNECT TO F2 FOR 200 VOLT FIELD.
Figure 12. LGC400-1.5-QDT and LGC400-10-QDT Connections
26
LGC Series
1
2
3
4
5
6
7
+
115
VAC
MOTOR
ARMATURE
230
VAC
MOTOR FIELD
(SHUNT WOUND
MOTORS ONLY)
-
EARTH GROUND
(GREEN SCREW)
NOTE: DO NOT make
any connections to
terminals 6 and 7 if using a
permanent magnet motor.
WITH 115 VAC INPUT:
CONNECT TO TERMINAL 1 FOR 50 VOLT FIELD.
CONNECT TO TERMINAL 6 FOR 100 VOLT FIELD.
WITH 230 VAC INPUT:
CONNECT TO TERMINAL 1 FOR 100 VOLT FIELD.
CONNECT TO TERMINAL 6 FOR 200 VOLT FIELD.
Figure 13. Cased Drive Connections
27
LGC Series
Section 4. Operation

!
WARNING!
Change voltage switch settings only when the drive is
disconnected from AC line voltage. Make sure both switches are
set to their correct position. If the switches are improperly set
to a lower voltage position, the motor will not run at full voltage
and may cause damage to the transformer. If the switches are
improperly set to a higher voltage position, the motor will
overspeed, which may cause motor damage, or result in bodily
injury or loss of life.
Dangerous voltages exist on the drive when it is powered. BE
ALERT. High voltages can cause serious or fatal injury. For your
safety, use personal protective equipment (PPE) when operating
this drive.
If the motor or drive does not perform as described, disconnect
the AC line voltage immediately. Refer to the Troubleshooting
section, page 52, for further assistance.
Before Applying Power
1. Verify that no foreign conductive material is present on the
printed circuit board.
2. Ensure that all switches and jumpers are properly set.
28
LGC Series
Select Switches
Input Voltage Select (SW501)
Set the input voltage select switch SW501 to either 115 or 230 to match
the AC line voltage. See Figure 14.
Armature Voltage Select (SW502)
Set the armature voltage select switch SW502 to either 90 or 180 to
match the maximum armature voltage. See Figure 14.
Input Voltage
Select (SW501)
Armature Voltage
Select (SW502)
Figure 14. Select Switches
29
LGC Series
Startup
LGC400-1.5, LGC400-1.5-QDT, LGC400-10, and LGC400-10-QDT
1.
Turn the speed adjust potentiometer full counterclockwise
(CCW) or set the input voltage signal to minimum.
2. Apply AC line voltage.
3. Slowly advance the speed adjust potentiometer clockwise
(CW) or increase the input voltage signal. The motor slowly
accelerates as the potentiometer is turned CW or as the input
voltage signal is increased. Continue until the desired speed is
reached.
4.
Remove AC line voltage from the drive to coast the motor to a
stop.
LGC410-1.5, LGC410-10, LGC440-1.5, and LGC440-10
1.
Turn the speed adjust potentiometer to “0” (full CCW) or set
the input voltage signal to minimum.
2. Set the POWER switch to the ON position.
3. Slowly advance the speed adjust potentiometer clockwise
(CW) or increase the input voltage signal. The motor slowly
accelerates as the potentiometer is turned CW or as the input
voltage signal is increased. Continue until the desired speed is
reached.
4. Set the POWER switch to the OFF position to coast the motor to
a stop.
30
LGC Series
LGC430-1.5 and LGC430-10

!
WARNING!
Do not change the FORWARD / REVERSE switch while the motor
is running. The motor must come to a complete stop before
reversing. Changing motor direction before allowing the motor to
completely stop will cause excessively high current to flow in the
armature circuit, and will damage the drive and/or motor.
1. Set the RUN/BRAKE switch to the BRAKE position.
2. Turn the speed adjust potentiometer to “0” (full CCW) or set
the input voltage signal to minimum.
3. Set the POWER switch to the ON position.
4. Set the FORWARD/REVERSE switch to the desired direction of
rotation.
5. Set the RUN/BRAKE switch to the RUN position.
6. Slowly advance the speed adjust potentiometer clockwise
(CW) or increase the input voltage signal. The motor slowly
accelerates as the potentiometer is turned CW or as the input
voltage signal is increased. Continue until the desired speed is
reached.
7. To reverse direction:
a.
Set the RUN/BRAKE switch to the BRAKE position.
b. Wait for the motor to come to a complete stop.
c. Set the FORWARD/REVERSE switch to the desired direction
of rotation.
d. Set the RUN/BRAKE switch to the RUN position.
8. To brake the motor, set the RUN/BRAKE switch to the BRAKE
position. To coast the motor to a stop, set the POWER switch to
the OFF position.
31
LGC Series
Starting and Stopping Methods

!
WARNING!
Dynamic braking, coasting to a stop, or decelerating to minimum
speed is recommended for frequent starts and stops. Do not use
any of these methods for emergency stopping. They may not stop
a drive that is malfunctioning. Removing AC line power (both
lines) is the only acceptable method for emergency stopping.
For this reason, American Control Electroincs strongly
recommends installing an emergency stop switch on both AC line
inputs (see Figure 11 on page 25).
Frequent starting and stopping can produce high torque. This
may cause damage to motors, especially gearmotors that are not
properly sized for the application.
Automatic Restart Upon Power Restoration
All drives automatically run to set speed when power is applied and the
inhibit is not active.
Line Starting and Stopping
Line starting and stopping (applying and removing AC line voltage) is
recommended for infrequent starting and stopping of a drive only. When
AC line voltage is applied to the drive, the motor accelerates to the speed
set by the speed adjust potentiometer or analog signal. When AC line
voltage is removed, the motor coasts to a stop.
32
LGC Series
Dynamic Braking

!
WARNING!
Wait for the motor to completely stop before switching back to
RUN. This will prevent high armature currents from damaging
the motor or drive.
Dynamic braking may be used to rapidly stop a motor (Figure 15 on page
34). For the RUN/BRAKE switch, use a two pole, two position switch
rated for at least the armature voltage rating and 150% of the armature
current rating. For the dynamic brake resistor, use a 40 watt minimum,
high power, wirewound resistor.
Sizing the dynamic brake resistor depends on load inertia, motor voltage,
and braking time. Use a lower-value, higher-wattage dynamic brake
resistor to stop a motor more rapidly. Refer to Table 4 on page 34 for
recommended dynamic brake resistor sizes.
Note: Models LGC430-1.5 and LGC430-10 incorporate dynamic braking
in their designs.
33
LGC Series
Table 4. Minimum Recommended Dynamic Brake Resistor Values
Motor Armature Voltage
Dynamic Brake Resistor Value
90 VDC
180 VDC
15 ohms
30 ohms
For motors rated 1/17 horsepower and lower, a brake resistor is not
necessary since the armature resistance is high enough to stop the
motor without demagnetization. Replace the dynamic brake with
12-gauge wire.
A1
A2
RUN
MOTOR
DYNAMIC BRAKE
RESISTOR
BRAKE
INHIBIT
Figure 15. Dynamic Brake Wiring
34
LGC Series
Inhibit Terminals
Short the INHIBIT terminals to coast the motor to minimum speed (see
Figure 16 for INHIBIT terminal location). Open the INHIBIT terminals to
accelerate the motor to set speed.
Twist inhibit wires and separate them from power-carrying wires or
sources of electrical noise. Use shielded cable if the inhibit wires are
longer than 18 inches (46 cm). If shielded cable is used, ground only one
end of the shield to earth ground. Do not ground both ends of the shield.
American Control Electronics offers two accessory plug harnesses for
connecting to the INHIBIT terminals: part number KTW-0001 [plug with
18 in. (46 cm) leads]; and part number KTW-0002 [plug with 36 in. (91
cm) leads].
Inhibit
Terminals
Figure 16. Inhibit Terminals
35
LGC Series
Decelerating to Minimum Speed
The switch shown in Figure 17 may be used to decelerate a motor to
a minimum speed. Closing the switch between S1 and S2 decelerates
the motor from set speed to a minimum speed determined by the
MIN SPD trim pot setting. If the MIN SPD trim pot is set full CCW, the
motor decelerates to zero speed when the switch between S1 and S2 is
closed. The DECEL trim pot setting determines the rate at which the drive
decelerates. By opening the switch, the motor accelerates to set speed at
a rate determined by the ACCEL trim pot setting.
CW
S3
10K OHM
SPEED ADJUST
POTENTIOMETER
S2
S1
RUN
DECEL TO
MIN SPEED
Figure 17. Run/Decelerate to Minimum Speed Switch
36
LGC Series
Section 5. Calibration

!
WARNING!
Dangerous voltages exist on the drive when it is powered. When
possible, disconnect the voltage input from the drive before
adjusting the trim pots. If the trim pots must be adjusted with
power applied, use insulated tools and the appropriate personal
protection equipment. BE ALERT. High voltages can cause serious
or fatal injury.
LGC series drives have user-adjustable trim pots. Each drive is factory
calibrated to its maximum current rating. Readjust the calibration trim
pot settings to accommodate lower current rated motors.
All adjustments increase with CW rotation, and decrease with CCW
rotation. Use a non-metallic screwdriver for calibration. Each trim pot is
identified on the printed circuit board.
37
LGC Series
Minimum Speed (MIN SPD)
The MIN SPD setting determines the minimum motor speed when the
speed adjust potentiometer or input voltage signal is set for minimum
speed. It is factory set for zero speed.
To calibrate the MIN SPD:
1.
Set the MIN SPD trim pot full CCW.
2. Set the speed adjust potentiometer or input voltage signal for
minimum speed.
3.
Adjust MIN SPD until the desired minimum speed is reached or
is just at the threshold of rotation.
Maximum Speed (MAX SPD)
The MAX SPD setting determines the maximum motor speed when the
speed adjust potentiometer or input voltage signal is set for maximum
speed.
To calibrate MAX SPD:
1.
Set the MAX SPD trim pot full CCW.
2.
Set the speed adjust potentiometer or input voltage signal for
maximum speed.
3. Adjust MAX SPD until the desired maximum speed is reached.
Note: Check the MIN SPD and MAX SPD adjustments after recalibrating
to verify that the motor runs at the desired minimum and maximum
speed.
38
LGC Series
Torque (TORQUE)

!
WARNING!
TORQUE should be set to 150% of motor nameplate current
rating. Continuous operation beyond this rating may damage the
motor. If you intend to operate beyond the rating, contact your
American Control Electronics representative for assistance.
The TORQUE setting determines the maximum torque for accelerating
and driving the motor. To calibrate TORQUE, refer to the recommended
TORQUE settings in Figure 18 on page 41 or use the following procedure:
1. With the power disconnected from the drive, connect a DC
ammeter in series with the armature.
2. Set the TORQUE trim pot to minimum (full CCW).
3. Set the speed adjust potentiometer full CW or input voltage
signal to maximum speed.
4. Carefully lock the motor armature. Be sure that the motor is
firmly mounted.
5. Apply line power. The motor should be stopped.
6. Slowly adjust the TORQUE trim pot CW until the armature
current is 150% of motor rated armature current.
7. Turn the speed adjust potentiometer CCW or decrease the
input voltage signal.
8. Remove line power.
9. Remove the stall from the motor.
10. Remove the ammeter in series with the motor armature if it is
no longer needed.
39
LGC Series
IR Compensation (IR COMP)
The IR COMP setting determines the degree to which motor speed is held
constant as the motor load changes.
Use the following procedure to recalibrate the IR COMP setting:
1.
Set the IR COMP trim pot to minimum (full CCW).
2. Increase the speed adjust potentiometer or input voltage signal
until the motor runs at midspeed without load (for example,
900 RPM for an 1800 RPM motor). A handheld tachometer may
be used to measure motor speed.
3. Load the motor armature to its full load armature current rating.
The motor should slow down.
4. While keeping the load on the motor, rotate the IR COMP trim
pot until the motor runs at the speed measured in step 2. If
the motor oscillates (overcompensation), the IR COMP trim pot
may be set too high (CW). Turn the IR COMP trim pot CCW to
stabilize the motor.
5. Unload the motor.
See Figure 18 on page 41 for recommended IR COMP settings.
40
LGC Series
MODELS LGC4x0-1.5, LGC400-1.5-QDT
TORQUE
TORQUE
IR COMP
IR COMP
1/8 HP
90 VDC
1.25 AMPS
1/20 HP
90 VDC
0.50 AMPS
TORQUE
TORQUE
IR COMP
IR COMP
1/4 HP
180 VDC
1.25 AMPS
1/10 HP
180 VDC
0.50 AMPS
MODELS LGC4x0-10, LGC400-10-QDT
TORQUE
TORQUE
TORQUE
TORQUE
TORQUE
IR COMP
IR COMP
IR COMP
IR COMP
IR COMP
1 HP
90 VDC
10.0 AMPS
3/4 HP
90 VDC
7.50 AMPS
1/2 HP
90 VDC
5.00 AMPS
1/3 HP
90 VDC
3.33 AMPS
1/4 HP
90 VDC
2.50 AMPS
TORQUE
TORQUE
TORQUE
TORQUE
TORQUE
IR COMP
IR COMP
IR COMP
IR COMP
IR COMP
2 HP
180 VDC
10.0 AMPS
1 1/2 HP
180 VDC
7.50 AMPS
1 HP
180 VDC
5.00 AMPS
3/4 HP
180 VDC
3.75 AMPS
1/2 HP
180 VDC
2.50 AMPS
Figure 18. Recommended TORQUE and IR COMP Settings
(actual settings may vary with each application)
41
LGC Series
Acceleration (ACCEL)
The ACCEL setting determines the time the motor takes to ramp to a
higher speed. See Specifications on page 1 for approximate acceleration
times. ACCEL is factory set for the shortest acceleration time (full CCW).
To set the acceleration time:
1.
Set the speed adjust potentiometer or input voltage signal for
minimum speed. The motor should run at minimum speed.
2.
Set the speed adjust potentiometer or input voltage signal for
maximum speed. Measure the time it takes the motor to go
from minimum to maximum speed.
3. If the time measured in step 2 is not the desired acceleration
time, turn the ACCEL trim pot CW for a longer acceleration time
or CCW for a shorter acceleration time. Repeat steps 1 through
2 until the acceleration time is correct.
Deceleration (DECEL)
The DECEL setting determines the time the motor takes to ramp to a
lower speed. See Specifications on page 1 for approximate deceleration
times. DECEL is factory set for the shortest deceleration time (full CCW).
To set the deceleration time:
1.
Set the speed adjust potentiometer or input voltage signal for
maximum speed. The motor should run at maximum speed.
2. Set the speed adjust potentiometer or input voltage signal for
minimum speed. Measure the time it takes the motor to go
from maximum to minimum speed.
3. If the time measured in step 2 is not the desired deceleration
time, turn the DECEL trim pot CW for a longer deceleration time
or CCW for a shorter deceleration time. Repeat steps 1 through
2 until the deceleration time is correct.
42
LGC Series
Section 6.Application Notes
Multiple Fixed Speeds
Replace the speed adjust potentiometer with a series of resistors with a
total series resistance of 10K ohms (Figure 19). Add a single pole, multiposition switch with the correct number of positions for the desired
number of fixed speeds.
R1
S3
R2
S2
R3
S1
TOTAL SERIES
RESISTANCE
10K OHMS
R4
Figure 19. Multiple Fixed Speeds
43
LGC Series
Adjustable Speeds Using Potentiometers In Series
Replace the speed adjust potentiometer with a series of resistors with a
total series resistance of 10K ohms (Figure 20). Add a single pole, multiposition switch with the correct number of positions for the desired
number of fixed speeds.
CW
S3
HIGH
SPEED
5K
OHM
LOW
SPEED
CW
S2
S1
5K
OHM
Figure 20. Adjustable Speeds Using Potentiometers In Series
44
LGC Series
Independent Adjustable Speeds
Replace the speed adjust potentiometer with a single pole, multiposition switch, and two or more potentiometers in parallel, with a total
parallel resistance of 10K ohms. Figure 21 shows the connection of two
independent speed adjust potentiometers that can be mounted at two
separate operating stations.
S3
SPEED 2
CW
CW
SPEED 1
20K
OHM
20K
OHM
S2
S1
Figure 21. Independent Adjustable Speeds
45
LGC Series
RUN/JOG Switch - Inhibit Connection
Using a RUN/JOG switch is recommended in applications where quick
stopping is not needed and frequent jogging is required. Use a single pole,
two position switch for the RUN/JOG switch, and a single pole, normally
closed, momentary operated pushbutton for the JOG pushbutton.
Connect the RUN/JOG switch and JOG pushbutton to the inhibit plug
as shown in Figure 22. The motor coasts to a stop when the RUN/JOG
switch is set to JOG. Press the JOG pushbutton to jog the motor. Return
the RUN/JOG switch to RUN for normal operation.
RUN
INHIBIT
JOG
PUSHBUTTON
JOG
Figure 22. RUN/JOG Switch - Inhibit Connection
46
LGC Series
RUN/JOG Switch - Potentiometer Connection
Connect the RUN/JOG switch and the JOG pushbutton as shown in Figure
23. When the RUN/JOG switch is set to JOG, the motor decelerates to
minimum speed (minimum speed is determined by the MIN SPD trim pot
setting). Press the JOG pushbutton to jog the motor. Return the RUN/JOG
switch to RUN for normal operation.
S3
CW
S2
10K OHM
SPEED ADJUST
POTENTIOMETER
S1
RUN
JOG
JOG
PUSHBUTTON
Figure 23. RUN/JOG Switch - Potentiometer Connection
47
LGC Series
Leader-Follower Application
In this application, use a ISO202-1 to monitor the speed of the leader
motor (Figure 24). The ISO202-1 isolates the leader motor from the
follower drive, and outputs a voltage proportional to the leader motor
armature voltage. The follower drive uses this voltage reference to set
the speed of the follower motor. An optional ratio potentiometer may be
used to scale the ISO2021 output voltage.
MOTOR
A2
(+) 2
9 (+)
A1
Leader
Drive
ISO202-1
8
7 (-)
TB501
S2
(-) 1
TB502
S1
10K Ohm
(optional)
Figure 24. Leader-Follower Application
48
Follower
Drive
LGC Series
Single Speed Potentiometer Control Of Multiple Drives
Multiple drives can be controlled with a single speed adjust potentiometer
using a ISO101-8 at the input of each drive to provide isolation (Figure
25). Optional ratio potentiometers can be used to scale the ISO101-8
output voltage, allowing independent control of each drive.
10K Ohms
ratio pot A
(optional)
10K Ohms
S3
+
S2
1
S2
S1
-
S1
+
Drive
A
A1
ratio pot B
(optional)
10K Ohms
A1
2
S2
-
S1
Motor
A
A2
Drive
B
Motor
B
A2
ISO101-8
+
ratio pot H
(optional)
10K Ohms
A1
8
S2
-
S1
Drive
H
Motor
H
A2
Figure 25. Single Speed Potentiometer Control of Multiple Drives
49
LGC Series
Reversing
A dynamic brake may be used when reversing the motor direction
(Figure 26). Use a three pole, three position switch rated for at least the
maximum DC armature voltage and maximum braking current. Wait for
the motor to stop completely before switching it to either the forward
or reverse direction. See the Dynamic braking section on page 34 for
recommended dynamic brake resistor sizes.
A1
A2
DYNAMIC
BRAKE
RESISTOR
MOTOR
FWD
BRAKE
REV
INHIBIT
Figure 26. Reversing Circuit Wiring
50
LGC Series
Section 7. Diagnostic LEDs
LGC series drives are equipped with one or two diagnostic LEDs:
•
Current Limit (CL or CUR LIMIT): Red LED lights whenever the drive
reaches current limit.
•
Power (POWER): Green LED lights whenever AC line voltage is
applied to the drive. (-Q models only)
LGC models
Current Limit
LED
Power LED
LGC-QDT models
Figure 27. Diagnostic LED Locations
51
LGC Series
Section 8. Troubleshooting

!
WARNING!
Dangerous voltages exist on the drive when it is powered. When
possible, disconnect the drive while troubleshooting. High
voltages can cause serious or fatal injury.
Before Troubleshooting
Perform the following steps before starting any procedure in this
section:
1.
Disconnect AC line voltage from the drive.
2. Check the drive closely for damaged components.
3. Check that no conductive or other foreign material has become
lodged on the printed circuit board.
4. Verify that every connection is correct and in good condition.
5. Verify that there are no short circuits or grounded
connections.
6. Check that the selection switch settings are correctly set.
7. Check that the drive’s rated armature is consistent with the
motor ratings.
For additional assistance, contact your local American Control
Electronics distributor or the factory direct:
(844) AMCNTRL or FAX: (800) 394-6334
52
LGC Series
PROBLEM
Line fuse
blows.
Line fuse does
not blow, but
the motor does
not run.
POSSIBLE CAUSE
SUGGESTED SOLUTIONS
1. Line fuse is the wrong size.
1. Check that the line fuse is
correct for the motor size.
2. Motor cable or armature is
shorted to ground.
2. Check motor cable and
armature for shorts.
3. Nuisance tripping caused by
a combination of ambient
conditions and high-current
spikes (i.e. reversing).
3. Add a blower to cool the drive
components, decrease TORQUE
settings, resize motor and drive
for actual load demand, or
check for incorrectly aligned
mechanical components
or “jams”. See page 38 for
information on adjusting the
TORQUE trim pot.
1. Speed adjust potentiometer
or input voltage signal is set
to zero speed.
1. Increase the speed adjust
potentiometer setting or input
voltage signal.
2. INHIBIT mode is active.
2. Remove the short from the
INHIBIT terminals or add a
short to INHIBIT terminals
if INHIBIT mode is set to
INVERTED.
3. S2 is shorted to S1.
3. Remove the short.
4. Drive is in current limit.
4. Verify that the motor is not
jammed. Increase TORQUE
setting if set too low.
5. Drive is not receiving AC line
voltage.
5. Apply AC line voltage.
6. Motor is not connected.
6. Remove power. Connect the
motor to A1 and A2. Reapply
power.
53
LGC Series
PROBLEM
SUGGESTED SOLUTIONS
1. MIN SPD is set too high.
1. Calibrate MIN SPD.
Motor runs in
the opposite
direction
1. Motor connections to A1
and A2 are reversed.
1. Remove power. Reverse
connections to A1 and A2.
Reapply power.
Motor runs too
fast.
1. MAX SPD is set too high.
1. Calibrate MAX SPD.
Motor will
not reach the
desired speed.
1. MAX SPD setting is too low.
1. Increase MAX SPD setting.
2. IR COMP setting is too low.
2. Increase IR COMP setting.
3. TORQUE setting is too low.
3. Increase TORQUE setting.
4. Motor is overloaded.
4. Check motor load. Resize the
motor and drive if necessary.
1. IR COMP is set too high.
1. Adjust the IR COMP setting
slightly CCW until the motor
speed stabilizes.
2. Motor bouncing in and out
of current limit.
2. Make sure motor is not
undersized for load; adjust
TORQUE trim pot CW.
Motor pulsates
or surges under
load.
54
POSSIBLE CAUSE
Motor does not
stop when the
speed adjust
potentiometer
is full CCW.
LGC Series
Figure 28. LGC Series Block Diagram
Section 9. Block Diagrams
55
LGC Series
A1
A2
S3
CW
P1
S2
10 KOHM
SPEED ADJUST
POTENTIOMETER
S1
L1
L2
F1
F2
SW3
NLT
WITH 115 VAC INPUT:
CONNECT TO TERMINAL 1 FOR 50 VOLT FIELD.
CONNECT TO TERMINAL 6 FOR 100 VOLT FIELD.
WITH 230 VAC INPUT:
CONNECT TO TERMINAL 1 FOR 100 VOLT FIELD.
CONNECT TO TERMINAL 6 FOR 200 VOLT FIELD.
MOTOR FIELD
(SHUNT WOUND
MOTORS ONLY)
7
6
+
+
5
FU2
MOTOR
ARMATURE
90 VDC (180 VDC)
4
3
2
1
230 VAC
115 VAC
LINE VOLTAGE
INPUTS
FU1
EARTH GROUND
(GREEN SCREWS)
FIgure 29. LGC410-1.5, LGC410-10, LGC440-1.5, and LGC440-10
Terminal Block Connections
56
LGC Series
TO
INHIBIT
PINS
A1
A2
CW
S3
P1
S2
10 KOHM
SPEED ADJUST
POTENTIOMETER
S1
L1
L2
SW3
NLT
F1
F2
RUN
SW3
SW2
FWD
BRAKE
REV
R32
WITH 115 VAC INPUT:
CONNECT TO TERMINAL 1 FOR 50 VOLT FIELD.
CONNECT TO TERMINAL 6 FOR 100 VOLT FIELD.
MOTOR FIELD
(SHUNT WOUND
MOTORS ONLY)
7
6
+
5
FU2
WITH 230 VAC INPUT:
CONNECT TO TERMINAL 1 FOR 100 VOLT FIELD.
CONNECT TO TERMINAL 6 FOR 200 VOLT FIELD.
+
4
MOTOR
ARMATURE
90 VDC (180 VDC)
3
2
1
115 VAC
230 VAC
LINE VOLTAGE
INPUTS
FU1
EARTH GROUND
(GREEN SCREW)
FIgure 30. LGC430-1.5 and LGC430-10 Terminal Block Connections
57
LGC Series
Section 10. Accessories & Replacement Parts
Displays
Closed Loop.............................................................................. CLD100-1
Open Loop.............................................................................. OLD100-1
Heat Sinks
Chassis..................................................................................... HSK-0001
NEMA 1.................................................................................... HSK-0002
Kits
Potentiometer & Connector
10K Pot, Insulating Washer................................................. KTP-0001
10K Pot, Insulating Washer, 9 Insulated Tabs..................... KTP-0002
9 Pin Terminal Block (included with -QDT drives)............... KTP-0003
Fuse
2 1.5 Amp 250V 3AG Fast-blow Glass Fuses........................ KTF-0001
2 3 Amp 250V 3AG Fast-blow Glass Fuses........................... KTF-0002
2 5 Amp 250V 3AG Fast-blow Glass Fuses........................... KTF-0003
2 8 Amp 250V 3AG Fast-blow Glass Fuses........................... KTF-0004
2 10 Amp 250V 3AB Normal-blow Ceramic Fuses............... KTF-0005
2 15 Amp 250V 3AB Normal-blow Ceramic Fuses............... KTF-0006
Wiring
Inhibit Plug (18 in. leads)....................................................KTW-0001
Inhibit Plug (36 in. leads)....................................................KTW-0002
Logic Cards
Current Sensing
5 Amps................................................................................CMC100-5
20 amps............................................................................CMC100-20
Isolation Cards
Unidirectional, 8 outputs......................................................ISO101-8
Bidirectional, 1 output..........................................................ISO202-1
58
LGC Series
Unconditional Warranty
A. Warranty
American Control Electronics warrants that its products will be free from defects in workmanship
and material for twelve (12) months or 3000 hours, whichever comes first, from date of
manufacture thereof. Within this warranty period, American Control Electronics will repair or
replace, at its sole discretion, such products that are returned to American Control Electronics,
14300 De La Tour Drive, South Beloit, Illinois 61080 USA.
This warranty applies only to standard catalog products, and does not apply to specials. Any
returns of special controls will be evaluated on a case-by-case basis. American Control Electronics
is not responsible for removal, installation, or any other incidental expenses incurred in shipping
the product to and from the repair point.
B. Disclaimer
The provisions of Paragraph A are American Control Electronics’s sole obligation and exclude all
other warranties of merchantability for use, expressed or implied. American Control Electronics
further disclaims any responsibility whatsoever to the customer or to any other person for
injury to the person or damage or loss of property of value caused by any product that has been
subject to misuse, negligence, or accident, or misapplied or modified by unauthorized persons
or improperly installed.
C. Limitations of Liability
In the event of any claim for breach of any of Americn Control Electronics’s obligations, whether
expressed or implied, and particularly of any other claim or breach of warranty contained in
Paragraph A, or of any other warranties, expressed or implied, or claim of liability that might,
despite Paragraph B, be decided against American Control Electronics by lawful authority,
American Control Electronics shall under no circumstances be liable for any consequential
damages, losses, or expenses arising in connection with the use of, or inability to use, American
Control Electronics’s product for any purpose whatsoever.
An adjustment made under warranty does not void the warranty, nor does it imply an extension
of the original 12-month warranty period. Products serviced and/or parts replaced on a
no-charge basis during the warranty period carry the unexpired portion of the original warranty
only.
If for any reason any of the foregoing provisions shall be ineffective, American Control Electronics’s
liability for damages arising out of its manufacture or sale of equipment, or use thereof, whether
such liability is based on warranty, contract, negligence, strict liability in tort, or otherwise, shall
not in any event exceed the full purchase price of such equipment.
Any action against American Control Electronics based upon any liability or obligation arising
hereunder or under any law applicable to the sale of equipment or the use thereof, must be
commenced within one year after the cause of such action arises.
59
LG C 4 0 0 - 1 . 5
LGC 400-1.5-QDT
LGC400-10
LGC400 -1 0 -QDT
LGC 410- 1.5
LGC410-10
LGC430-1.5
LGC 430-10
LGC440-1.5
LGC440-10
TM
w w w.a m ericancont rolelect ronics.com
1430 0 DE LA TOUR DRIV E
SO U TH BELOIT, IL 61080
(844) A MCNTRL
MA N-0001 Rev 2
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