Users Manual Chapter 5

102 Thor VM3A Vehicle-Mounted Computer
1. Connect the wire from Pin 8 of the cable to the switched side of the Screen
Blanking Box or to a user-supplied switch.
2. Connect the wire from Pin 7 of the cable to the unswitched side of the Screen
Blanking Box or to a user-supplied switch.
3. Connect the D9 serial connector to either COM1 or COM2 serial port on the
dock.
Screen Blanking Box
It is assumed that the motion sensing circuitry in the illustrations below is powered
by internal vehicle circuitry.
Please refer to the appropriate illustration below for Screen Blanking Box wiring
diagrams.
Screen Blanking
Box Terminal
Connection
+VI Input from vehicle motion sensing circuitry.
Please refer to label on Screen Blanking Box for allowable voltage input
range.
GND DC -
These two terminals are for connecting a serial cable:
• If using an optional Honeywell screen blanking cable, VM1080CABLE,
connect the gray wire to the switched side of the connection and connect
the black wire to the unswitched side.
• If using a user-supplied cable, the cable must be constructed so that Pin
7 (RTS) connects to switched side of the connection and Pin 8 (CTS)
connects to the unswitched side.
Unswitched Switched
Warning: Do not exceed the maximum input voltage, either 60 or 72VDC,
specified on the Screen Blanking Box label when using this
configuration.