Connections And Wiring Guidelines - Curtis 1352 Manual

2 — INSTALLATION & WIRING:
+
C A U T I O N
6
Low Current Connections
CONNECTIONS
All connections are made through the 14-pin AMPSEAL connector. The mating
plug housing is AMP p/n 776273-1, and the gold-plated socket terminals are
AMP p/n 770520-3 (Strip form) and 770854-3 (loose piece). The connector will
accept 20 to 16 AWG wire with a 1.7 to 2.7mm diameter thin-wall insulation.
Note that the eXm pins are not sealed until the mating connector is
fully engaged and locked. The cable harness connector has a silicone rubber
seal that is an integral part of the module's sealing.
The 14 individual pins are characterized in Table 1.
Wiring recommendations
Power and ground (Pins 1–3)
The B+ and B– cables should be run close to each other between the module
and the battery. For best noise immunity the cables should not run across the
center section of the module.To prevent overheating these pins, the wire gauge
must be sufficient to carry the continuous and maximum loads that will be
seen at each pin.
PWM drivers (Pins 9–14)
The PWM drivers produce high frequency (16kHz) pulse waves that can radiate
RFI noise. The wire from the module to the load should be kept short and
routed with the return wire back to the module.
CAN bus (Pins 4 and 5)
It is recommended that the CAN wires be run as a twisted pair. However,
many successful applications at 125 kBaud are run without twisting, simply
using two lines bundled in with the rest of the low current wiring. CAN wiring
should be kept away from the high current cables and cross it at right angles
when necessary. If the eXm is at the end of the CAN bus, the bus needs to be
terminated by externally wiring a 120Ω ½W resistor across CAN High and
CAN Low.
All other low current wiring (Pins 6–8)
The remaining low current wiring should be run according to standard
practices. Running low current wiring next to the high current wiring should
always be avoided.
1 5
6 9
10 14
Curtis 1352 eXm Manual,
Rev. D