Page 1
DURA
pulse
GS20 AC Drive Quick-Start Guide – 1st Ed, Rev C 03/03/2022
DURA
pulse
GS20 AC Drive Quick-Start Guide
GS20_QSP 1st Edition, Rev C 03/03/2022
GS20 AC Drives Installation Instructions
Sensorless Vector Control Variable Frequency Micro-drive
• Please read this instruction sheet thoroughly before installation and retain for later
reference.
• To ensure the safety of operators and equipment, only qualified personnel familiar
with AC drives should install, wire, program, and operate the GS20 drive. Always read this instruction sheet
thoroughly before using the GS20 drive, especially the WARNING, DANGER and CAUTION notes. If you have any
questions, please contact AutomationDirect.
PLEASE READ PRIOR TO INSTALLATION FOR SAFETY
DANGER
• The ground terminal of the GS20 drive must be grounded correctly. The grounding method
must comply with the laws of the country where the GS20 drive is to be installed.
• After power has been turned off, the capacitors in the GS20 drive may retain a charge for
several minutes. To prevent personal injury, visually verify that the “CHARGE” LED has
turned off. Then measure to confirm that the DC bus voltage level between terminals (+1)
and (-) is less than 25VDC before touching any terminals. (Capacitor discharge will take at
least 5 minutes for most GS20 models)
• The CMOS ICs on the internal circuit boards of the GS20 drive are sensitive to static
electricity. Please DO NOT touch the circuit boards with your bare hands before taking
anti-static measures. Never disassemble the internal components or circuits.
• If wiring changes must be made, turn off power to the GS20 drive before making those
changes. Allow the internal DC bus capacitors in the GS20 drive sufficient time to discharge
prior to making changes in power or control wiring. Failure to do so may result in short
circuit and fire. To ensure personal safety, allow DC bus voltage to discharge to a safe level
before making wiring changes to the GS20 drive.
• DO NOT install the GS20 drive in locations subject to high temperature, direct sunlight, or
flammable materials.
WARNING
• Never apply power to the output terminals U/T1, V/T2, W/T3 of the GS20 drive. If a fault
occurs during operation of the GS20 drive, refer to the fault code descriptions and corrective
actions to reset the fault before attempting to operate the GS20 drive.
• DO NOT use Hi-pot test for internal components. The semi-conductors in the GS20 drive are
easily damaged by high voltage.
CAUTION
• Long motor lead lengths may result in reflective wave due to impedance mismatch between
the motor cable and the motor. Reflective wave may damage the insulation of the motor.
To avoid the possibility of reflective wave damage, use an inverter-rated motor with an
insulation rating of 1600 volts. A load reactor installed between the GS20 drive and motor
will help to mitigate reflective wave.
• Nominal supply voltage to the GS20 drive should be less than or equal to 120/240/480 volts
AC depending on GS20 model.
• Nominal supply current capacity should be less than or equal to 100kA for all GS20 models.
• The GS20 drive must be installed in a clean, well-ventilated and dry location, free from
corrosive gases or liquids.
• The GS20 drive must be stored within an ambient temperature range from –40°C to +85°C,
and relative humidity range of 0% to 90% without condensation.
• Do not apply AC power to the GS20 drive with the front cover removed. Following a fault of
the GS20 drive, wait 5 seconds before pressing the RESET key.
• To improve power factor, install a line reactor ahead of the GS20 drive. Do not install power
correction capacitors in the main AC supply circuit to the GS20 drive to prevent drive faults
due to over-current.
Minimum Wiring
• AC input power to R/L1, S/L2, T/L3 (for single-phase input, use two of the terminals) (For applicability of 1-phase
input power, please refer to Chapter 1 of the DURApulse GS20 AC Drives User Manual at
.)
• Ground from the power supply
• Drive power to the motor (U, V, W on T1, T2, T3) (For use with 3-phase motors only!)
• Ground to the motor
• STO1 and STO2 (both must be wired through appropriate N.C. safety-rated contacts to DCM or the
factory-installed jumpers must be left in place)
With this minimal wiring, the drive can be operated via the keypad to test the motor and drive installation.
See the “Parameter Set Up” (
) section to configure the drive for keypad operation.
Recommended Safety Wiring
We strongly recommend that customers use the STO safety feature.
The Safe Torque Off (STO) function turns off the power supplied to the motor through the hardware, so
that the motor cannot produce torque. This method of removing power from the motor is considered an
emergency stop, also known as “coast to stop.”
To use this feature, disconnect the appropriate factory-installed jumpers and wire a safety relay or safety PLC
as shown. The E-Stop pushbutton should be wired through a Safety Relay or PLC to meet Category 3 safety
requirements. See User Manual Appendix E for wiring the GS20 with STO.
Wiring Diagrams
RFI Jumper Removal
If the power distribution system supplying the GS20 AC drive is a floating (IT) or an
asymmetric ground system (including most 120V inputs), the RFI jumper must be
removed.
Removing the RFI jumper uncouples the internal RFI capacitor (filter capacitor)
between the GS20 drive frame and circuitry to avoid damaging those circuits and
(according to IEC 61800-3) to reduce ground leakage current.
GS20 Frame A through F
Note: Remove Clip
Main Wiring (Power Circuit)
For main (power) wiring terminal specifications, Please refer to “Specifications for Wiring Terminals –
Main-Circuit Terminals” (
GS20 all Frames
*(Note that 1-phase drives do not have a T/L3 terminal. 120V drives do not have DC- and DC+ terminals.)
R/L1
S/L2
T/L3*
R/L1
S/L2
T/L3*
U/T1
V/T2
W/T3
3~
R1C
R1
R1C and R1 are the relay output terminals.
Input: one-phase / three-phase* power
DC reactor (optional)
Brake resistor (optional)
Jumper
Motor
Circuit Breaker or Fuse
MC
ON
MC
OFF
It is recommended that
you install a protective
circuit at R1C – R1 to
protect the drive from
damage.
When a fault occurs, the MC contactor
switches to OFF to shut off the drive input
power and protect the power system.
MC
GS20 Control Terminal Wiring
(See page 2 for Start/Stop wiring options)
DO
DCM
Multi-function output
frequency terminals
30 VDC / 30 mA 33 kHz
DO2
DOC
DO1
Multi-function output
terminal 48 VDC / 50 mA
Multi-function output
terminal 48 VDC / 50 mA
Multi-function output
common terminal (photocoupler)
USB Port
Communication card/
DC 24V external power supply card
Option Slot
250 VAC / 3 A (N.O.)
250 VAC / 3 A (N.C.)
R1O
R1C
R1
Inductive Load (COS 0.4)
250 VAC / 1.2 A
Multi-function relay output terminals
Modbus RS-485
8 1
SG+
SGND
Control terminals
Shielded leads & Cable
Main circuit terminals
NOT E
DI1/FWD
DI2/REV
DI3
DI4
DI5
DI6
DI7
DCM
+24 V
+24 V
Default functions
set via Parameters
P02.00 - P02.07
FWD/STOP
REV/STOP
Multi-step speed 1
Multi-step speed 2
Multi-step speed 3
Multi-step speed 4
N/A
Digital Signal Common
*DI7 can input 33 kHz pulses.
*Do NOT apply the mains voltage directly to
external terminals.
Default:
NPN (SINK) Mode (internal power)
Please refer to the wiring of NPN mode and PNP mode.
STO1
+24 V
STO2
E STOP
+24 VDC
Safety PLC
or Relay
N OT E
SCM
* 1
It is a short circuiting jumper installed between
+24 V, S1 and S2 short when GS20 leaves the factory.
Remove this short circuiting jumper before using the
safety function while wiring.
*
1:
*
2: The +24 V is for STO only, and cannot be used for any
other purpose.
2
*
AI1
ACM
+ 10 V
3
2
1
0
–
10 VDC
AI2
0
–
10 VDC
+10 VDC / 20 mA
-10 VDC
–
10 VDC
0
–
20 mA / 4
–
20 mA
Analog Signal common
Analog Multi-function output
terminal 0 – 10 VDC /
0 – 20 mA / 4 – 20 mA
Analog Signal common
+
5KΩ
PN
P
NPN
PN
P
N
P
N
0-
10
V
AFM
4
–
20 mA
0-
10
V
AO1
0
–
20 mA
0
–
10 V
0-
20
m
A
4-
20
m
A
ACI
0
–
20 mA
4
–
20 mA
0-
20
m
A
4-
20
m
A
AI2
0
–
20 mA
4
–
20 mA
0
–
10 V
AO1
See User Manual Appendix D for
sink/source wiring examples
See User Manual Appendix E for
more information
Functions set via Parameter P02.13
Functions set via Parameters P02.16 and P02.17
Functions set via Parameter P03.20
Functions set via Parameters
P03.00 and P03.01
FWD (DI1)
REV (DI2)
DI7
FWD (DI1)
REV (DI2)
DI7
FWD (DI1)
REV (DI2)
DI7
FWD (DI1)
REV (DI2)
DI7
