Appendix D: Using GS4 AC Drives with AutomationDirect PLCs
Page D–9
DuRApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
drive frequenCy ouTpuT (high-speed pulse ouTpuT)
The GS4 has one high-speed pulse train output: FO. This pulse train output is based on the actual
main frequency output of the drive. A scaling factor is available to adjust the frequency.
P3.38 Frequency Output Scaling Factor:
•
Actual FO pulses per second output = GS4 output frequency (Hz) x P3.38
Drive FO output is limited to 30V@ 30mA max. Max frequency is 100kHz (50% duty cycle).
The PLC high-speed input will have a certain amount of resistance built-in (P2-HSI module has 2kΩ
resistance). The drive terminal FO needs to see a minimum of 1kΩ resistance.
P2 Expansion Module
P2-HSI
IN3+
IN3-
IN4+
IN4-
2K Ohm
2K Ohm
-1Z
+1Z
-2Z
+2Z
2K Ohm
2K Ohm
5VDC to
24VDC
FO
DCM
Digital Output Com.
+
–
FO output pulses
at drive output
frequency x P3.38
(scaling factor)
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