HPEVS Curtis 1239 E, Electrical Schematics And Documentation, Page: 12 / 57

12
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. Connect to primary
harness at the Blue KSI wire.
2 N/C
3 N/C
4 Driver 3 Precharge Orange Precharge relay driver.
5 N/C
6 Driver 1 Main_Contactor Orange/Wht
Main Contactor Coil Driver.
7
I/O Ground Black /Blue
Input and output ground reference.
8 Analog 2 Motor_Temperature_Sensor Blue Used as the motor temperature analog input
9 N/C
10 Menu Menu_Button
Active high, connect to 12
volts. See schematic White/Red
Momentary switch; used to scroll through 840 spyglass
display
11
N/C
12 N/C
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.
14 N/C
15
N/C
16 N/C
17 N/C
18 N/C
19 N/C
20 N/C
21 CAN Term H CAN Termination Black CAN termination jumper.
22 N/C
23
CANH CAN High Orange
CAN bus high.
24 N/C
25 +12V Out Red/Blue Unregulated low power +12V output.
26 N/C
27 N/C
28
Serial TX White
Serial transmit line for display or flash update.
29 Serial RX Green Serial receive line for display or flash update.
30 N/C
31 Encoder Phase A MotorspeedA_Input White Quadrature encoder input phase A
32 Encoder Phase B MotorspeedB_Input Green Quadrature encoder input phase B
33
N/C
34 CAN Term L CAN Termination Black CAN bus termination jumper.
35 CANL CAN Low Grey CAN bus low.
Generic Software Switch Pin Out Specific for 1239 Controller. Secondary Controller in Dual Motor Applications