Whelen Engineering Company CenCom Core-R CEM4HC Installation Manual Download Page 2

Page 2

1

4

2

3

1

4

2

3

(+)

Battery

(-)

Connect
negative terminal of
light to Ground

Connect

Positive terminal of light to

Output wire

15 AMPS EA

J4-1 - OUTPUT 1 - RED

J4-2 - OUTPUT 2 - WHT

J4-3 - OUTPUT 3 - BLU

J4-4 - OUTPUT 4 - GRN

Connect

to WeCanX

CANbus

Fuse each

wire @

40 AMPS

REAR VIEW

REAR VIEW

These communication

wires must be a twisted

pair / 7 twists per linear ft

RED

RED

J1

GREY - J1-2  CAN LOW

18A
WG

12A
WG

GRN - J3 - CAN HIGH

BLK/WHT - J1-1 - CAN SHIELD

BLK - J1-4 - GND

Wire Gauge Chart

WARNING! All customer supplied wires that
connect to the positive terminal of the battery
must be sized to supply at least 125% of the
maximum operating current and

at

FUSED

the battery to carry the load.

DO NOT USE CIRCUIT BREAKERS WITH THIS
PRODUCT!

WeCanX

POSITIVE

Outputs

J4

J2

J1

BATTERY INPUT

+VBAT / 40AMPS

MAX each

J4

J2

J1

The WeCanX™ High Current Remote Expansion Module

Operates at 10-30V and connects to the WeCanX™ bus to
communicate with CenCom Core™. 

Specifications:

Input Voltage

. . . . . . . . . . . . . . . . . . . . . . . .

10 - 30 VDC

Input Current

. . . . . . . . . . . . . . . . . . . . . . .

60 amps max

Sleep Current

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 mA

Output Current

. . . . . . . . . . . . . . . . 

15 amps per output

Communication Protocol

. . . . . . . . . . . . . . . 

WeCanX

Operating Temperature

. . . . . . . . . . . . . 

-

40C to +65C

IP Rating

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .

IP67

Features:

• Programmable High/Low Power

• Four 15 amp high current outputs / high side 

switched

• All outputs syncronizable with other WeCanX 

system outputs

• Outputs support standard & DVI flash 

patterns

• Short circuit and over-current protection

• Reverse polarity and over-voltage protection

Mounting:

Selecting a mounting location:
This  module  has  been  designed  to  be  mounted
under  the  hood,  in  the  trunk  or  in  the  passenger
compartment.  Regardless  of  the  location  selected,
the following notes must be observed:

• The module should be mounted on a flat 

surface. Be sure that this surface is not one that 
either generates or is exposed to excessive heat during normal 
operation of the vehicle.

• Do not select a location where the module will be 

exposed to potential damage from any 
unsecured or lose equipment in the 
vehicle.

• The mounting area should be easily 

accessible for wiring and service purposes. 
Be sure that the backside of the proposed 
mounting surface does not hide any wires, cables, fuel 
lines, etc., that could be damaged by drilling mounting holes.

• When you find a suitable location secure the module using the supplied 

mounting hardware.

Wiring & Operation:

• Wire the module as shown 

in the wiring diagram. 
Follow the wire gauge chart 
for proper wire size when 
extending the wires. 

NOTE: 

Add the supplied shrink 
wrap tubing to the 
connectors.

• Extend the WeCanX wires to 

the CenCom Core™ Main 
Box and connect them as 
shown. Operation is 
controlled by CenCom 
Core™.

• Extend two 10 AWG wires to 

the positive terminal of the 
battery, connect there and 
fuse as shown.

• Extend the four positive output wires to the positive terminals of the 

lights you wish to operate and extend the negative terminal of each light 
to battery ground. Operation is controlled by CenCom Core™.

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