2 — INSTALLATION AND WIRING
Curtis Model 1226 – September 2019
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pg. 10
WIRING DIAGRAM: STANDARD CONFIGURATION
Figure 6 is a representative wiring diagram for the Curtis 1226 models. e diagram is for a Class III
vehicle that has the operator controls directly wired to the controller.
Note: e wiring diagram is designed for typical Class III vehicles and may not fully meet your
application’s requirements. However, the 1226 controller provides the exible I/Os and programmable
parameters needed to fulll your requirements. To discuss how to implement your application,
contact your Curtis distributor or support engineer.
INTERLOCK
KEYSWITCH
CONTROL
FUSE
INTERLOCK
B–
B+
POWER FUSE
BATTERY
MODE
J3-18**
J1-1
J3-3
EXT_+14V
I/O GND
TX/CANH
RX/CANL
ET-1XXE
J3-1
J3-10
J3-11
J3-12
J3-15
KSI
EM STOP
MODE SW
FORWARD
REVERSE
EM REV
I/O GND
POT WIPER
J3-5
J3-2
BDI
BDI(0-5V)
EXT_+5V
HORN
KSI
GND
0-5V
FWD
REV
Speed
Sensor
SPEED SENSOR
EXT_+5V
I/O GND
STATUS LED
MOTOR TEMP
SPEED LIMIT
CHARGE INHIBIT
PUSH SW
J3-14
J3-4**
EMR NO
EMR NC
PUSH
J3-9
J3-6
J3-16
J3-17
J3-7
J3-8**
J1-1
J1-2
J1-5
J1-6
J1-3
J1-4
J2-4
J2-3
J2-2
J2-1
T
M1
M2
A
BRAKE+
EM BRAKE
GENERIC DRIVER 1 /
EM BRAKE DRIVER
(Low side)
COIL RETURN
GENERIC DRIVER 2
(High/low side)
GENERIC DRIVER 3
(Low side)
HORN DRIVER
*
*
* Option for high side drive
I/O GND
SPEED
LIMIT POT
(100kΩ )
I/O GND
J3-13
J3-13
J3-13
J3-10
SW3
** Option for Using momentaryOption wirings
R
R
POT HIGH
COIL RETURN
Main Contactor
only for -52XX
Coil
Load
INHIBIT
Voltage R
24V 1.5 kΩ, 0.5 W
36V 2.4 kΩ, 1 W
48V 3.2 kΩ, 2 W
Coil Load
Coil Load
Direct connection
for -22XX/31XX
switch with status LED
Programmer
Figure 6
Wiring Diagram, Curtis 1226 Controllers