Curtis 1238SE - Low Power 35-Pin Connections

2 — INSTALLATION AND WIRING
pg. 9
Return to TOC Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017
LOW POWER 35-PIN CONNECTIONS
All low power connections are made through a single 35-pin AMPSEAL connector. e mating plug
housing is AMP p/n 776164-1 and the gold-plated socket terminals are AMP p/n 770520 (Strip form)
and 770854-3 (loose piece). e connector will accept 0.5 – 1.25 mm (20 – 16 AWG) wire with a
1.7 – 2.7 mm diameter (thin-wall insulation). Seal any non-used connector positions that have the
silo-diaphragm pierced with seal plug 770678-1.
e 35 individual pins are characterized in Table 2.
Low Power Wiring Guidelines
Position feedback (Pins 7, 26, 31, 32)
All four wires (+5V, Feedback A, Feedback B, and I/O ground) should be bundled together as they
run between the motor and controller logic connector. ese can oen be run with the rest of the low
current wiring harness. e encoder cables should not be run near the motor cables. In applications
where this is necessary, shielded cable should be used with the ground shield connected to the I/O
ground (pin 7) at only the controller side. In extreme applications, common mode lters (e.g. ferrite
beads) could be used.
CANbus (Pins 21, 23, 34, 35)
It is recommended that the CAN wires be run as a twisted pair. However, many successful applications
at 125 kbit/s are run without twisting, simply using two lines bundled in with the rest of the low
current wiring. e CANbus wiring should be kept away from the high current cables and cross
them at right angles when necessary.
All other low power wiring
e remaining low power wiring should be run according to standard practices. When designing
the vehicle’s wiring and routing, keep the input lines such as throttle, brake, temperature, and the
above mentioned encoder or Sin/Cos sensor signals separate from controller’s output lines such as
the coil driver outputs. Avoid routing the low-power wiring parallel to the high power (and current)
battery and motor cables.
13
24
1
23
35
12
J1
harness wire-side view