HPEVS Curtis 1239 E, Electrical Schematics And Documentation, Page: 5 / 57

5
Pin # Name Function Terminations Wire color Detailed Description
1
KSI Keyswitch_Input Blue
Keyswitch input. Provides logic power for
the controller and power for the coil
drivers.
4 Driver 3 Precharge Grey Precharge relay driver. (1239 ONLY)
6 Driver 1 Main_Contactor Orange/White Main Contactor Coil Driver.
7 I/O Ground Black /Blue Input and output ground reference.
9
Switch 3 Accel_Switch_Input Active high,
connect to 12
volts. See
schematic
Green
Used as safety interlock; switch is open
when throttle switch is released. Type 2 & 3
throttle only.
13 Coil Return Coil Return Common to all
relay coils
Blue/White This is the coil return pin (at B+ potential)
for all the contactor and relay coils.
16 Throttle Pot Wiper Pot Wiper Yellow/White Wiper or throttle input.
22 Switch 7 Forward_Switch_Input Active high,
connect to KSI
to activate.
White Used by the Motor Control to select
forward direction
25 +12V Out Red/Blue Unregulated low power +12V output.
33 Switch 8 Reverse_Switch_Input Active high,
connect to KSI
to activate.
Yellow Used by the Motor Control to select reverse
direction
Quick Start Electrical Schematic Generic Software Pin Out Specific for 1239 "E" Controllers Single Motor or Primary in Dual
Motor Applications