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IronHorse GSD8 DC Drives User Manual – 1st Ed. Rev. A – 10/15/2019
GSD8 Series Terminals
Terminal
Number
Description
Terminal
Marking
P1-1
For single phase AC lines connect the Neutral side of the AC line to this terminal. For systems with
two hot AC lines, connect either of the Hot AC lines to this terminal.
AC/N
P1-2
For single phase AC lines connect the Hot side of the AC line to this terminal. For systems with two
hot AC lines, connect either of the Hot AC lines to this terminal.
AC/L
P1-3
The -Armature terminal. For normal rotation of the motor, the -Armature lead of the motor should
be connected to this terminal. The +Armature lead of the motor will be connected here when a
reverse directional rotation of the armature is desired.
-A
P1-4
The +Armature terminal. For normal rotation of the motor, the +Armature lead of the motor
should be connected to this terminal. The -Armature lead of the motor will be connected here
when a reverse directional rotation of the armature is desired.
+A
P1-5
Common point for the control logic. The speed sensor common lead as well as any other source
needing to reference the control common will be connected to this terminal.
COM
P1-6
Self-con5VDC power supply capable of up to 50mA. The speed sensor supply lead can be
connected to this terminal for its power source.
+5V
P1-7
Signal input terminal for the motor’s digital pickup or encoder. This signal is internally “pulled-up”
to +5VDC via a 2.2K ohm resistor.
S1
P1-8
This input can be programmed to perform a number of advanced functions. In Follower Mode, this
input is the signal input terminal for the master’s digital pickup or encoder. In Master modes (Rate
and Time), this input can be configured to function as an emergency stop, inhibit or jog (preset
speed) command. This signal is internally “pulled-up” to +5VDC via a 2.2K ohm resistor.
S2
P1-9
The normally-open contact of the user assignable relay output.
NO
P1-10
The common contact of the user assignable relay.
C
P1-11
The normally-closed contact of the user assignable relay output.
NC
P1-12
This input can be programmed to perform a number of advanced functions. It can be configured
to function as an emergency stop, inhibit or jog (preset speed) command. This signal is internally
“pulled-up” to +5VDC via a 2.2K ohm resistor.
IN1