2 - 4 VC80 User Guide
Wiring Vehicle Power to the VC80
An extension power cable is used to wire the VC80 to the truck battery (order cable separately, see Accessories on
page 6-1). Wire this cable to a filtered, fused (15A max) accessory supply on the vehicle. Follow the installation
instructions supplied with the extension cable.
Additional wiring (minimum 14 gauge), connectors or disconnects used should be rated for at least 300 VDC, 15A.
When connecting the extension power cable:
•
If a power extension cable with ignition sense is used, ensure that the ignition sense wires (18AWG wires in
red and black leads) and the power wires (14AWG in red and black leads) are reliably secured away from
each other, or are separated with reliably secured certified insulation. Minimum 2.8 mm distance, or 0.4mm
distance through insulation is required for the separation.
•
The red lead of the 14AWG power cables attach to the vehicles battery positive terminal. The 14AWG black
lead connects to the vehicle’s battery negative terminal. This should be connected to a proper terminal block
and not to the vehicle body. An optional grounding strap wire (sourced separately) may be connected to the
ground lug of the VC80 terminal connector bay and to the vehicle chassis.
•
You may have the option to connect power before or after the key switch. Though the VC80 is equipped with
a UPS, a proper shut down is recommended using the windows shut down procedure. If it is wired after the
key switch, the operator must shut down the VC80 using the Windows shut down procedure before turning
off the vehicle. If it is wired before the key switch, then to avoid excessive drain on the vehicle battery, either
the operator should shut it down when the vehicle is to be left off for an extended period, or the ignition cable
shut down wire should be connected and the VC80 configured to shut down automatically.
•
An appropriate fuse type must be used with the power extension cable according to the installation
instructions. For main power cable, use 3AB, 15A, 250V, slow blow fuse. For ignition sense input, use 3AB,
0.3A, 250V, slow blow fuse.
WARNING Applying voltage above the input voltage rating or reversing polarity may result
in permanent damage to the VC80 and void the product warranty.
NOTE
The VC80 supports the ignition sense feature that detects when the ignition switch or key
switch is On or Off to allow automatic computer start up or shut down (with delay as needed).
When wiring the ignition sense wires (18AWG in red and black), the red 18AWG wire is
connected to a positive DC voltage source switched on by the ignition. The black 18AWG wire
is connected to ground reference of this switched ignition source.
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