Users Manual Chapter 5

Thor VM3A Vehicle-Mounted Computer 103
Note: The black and gray wire colors in the illustration only apply to the optional Honeywell
Screen Blanking Box Cable, VM1080CABLE. The wire colors may be different in a
user-supplied cable.
Screen Blanking with Switch
In applications where it is impractical to use the screen blanking box due to vehicle
voltage or lack of a motion sensing signal, screen blanking can be controlled via a
user supplied switch or relay that provides an electrical conductive connection on
vehicle motion.
Pins 7 and 8 must be connected as shown in the illustration above. No other pins
are to be connected.
MOTION
CIRCUITRY
To
-Vo on vehicle,
i.e. Negative
battery terminal
3A fuse
+Vi
GND
To pin 7 of COM1 or
COM2
To pin 8 of COM1 or
COM2
To pins 7 and 8
of COM1 or
COM2
port on dock