Motorola VC5090 Product Reference Manual page 40

2 - 12 VC5090 Vehicle Computer Product Reference Guide
Shorten cable to desired length.
3.
Place a fuse and fuse holder in-line of the red, black and yellow wires approximately four inches from the cable
4.
end, as shown in
Slide shrink tubing over wires.
5.
Strip wires (0.4 in./10 mm) and insert into the fuse holder. Crimp fuse holder ends to ensure a proper electrical
6.
connection (use Thomas & Betts WT-11-M crimp tool or equivalent).
Heat shrink tubing.
7.
Connect the red wire to the vehicle's positive power source. Connect the black wire to the vehicle's negative
8.
power source.
NOTE The vehicle computer contains an Ignition Sense feature that detects when the ignition switch is turned off
and shuts the vehicle computer down after a preprogrammed timeout. This feature allows the operator to use
the vehicle computer for a predetermined time period after the ignition switch is turned off, then shuts the
vehicle computer down automatically to prevent over-discharge of the forklift battery. The timeout period is
adjustable by the user (see
draw of a suspended vehicle computer is approximately 500mA. When the vehicle computer shuts down
using the Ignition Sense feature, current draw is reduced to approximately 5 mA. This feature provides the
automatic shutoff functionality of an external relay, without requiring an actual relay and has the added benefit
of allowing the user to work for a preset time period before shutting down.
Connect the yellow wire to the vehicle's ignition switch. If you do not plan on using the Ignition Sense feature,
9.
connect the yellow wire to the vehicle's positive power source.
Ensure the wiring connections created are sufficiently insulated from each other.
10.
Re-connect the vehicle battery.
11.
Insert the power cable connector into the vehicle computer's Power port. Align the keyway on the power
12.
connector with the notch on the vehicle computer's power port.
24 to 48 Volt Forklifts
NOTE Use power cable, p/n 25-71919-02R.
See the vehicle Owner's Manual for specific wiring information.
This power cable needs to be connected between the forklift power source and the VC5090 in order to reduce
potentially problematic electrical noise generated by the forklift's electric motor drive. This power cable should only
be used on nominal 24 to 48 volt electric forklifts. Do not use this power cable if the electric forklift is providing
power through a DC to DC converter with an output less than 24 volts. When using the power cable, the ignition
sense feature of the VC5090 is disabled.
!
WARNING Never perform an installation on a live electric forklift.
• All power wiring must use the supplied power cable.
• Fuses: two 3AG, 20A, 250V, SLO BLO fuses
Place the VC5090 main power switch on top of the device to the off position.
1.
Disconnect the forklift battery.
2.
Figure 2-6 on page 2-6.
Ignition Sensing on page 3-22 for setting the timeout value). The normal current