Users Manual Chapter 5

Thor VM3A Vehicle-Mounted Computer 101
Note: Wire colors only apply to optional Honeywell Screen Blanking Box Cable,
VM1080CABLE. Wire colors may vary in a user-supplied cable.
The optional Honeywell Screen Blanking Box Cable, VM1080CABLE, is installed as
follows:
1. Connect the gray wire of the cable to the switched side of the Screen Blanking
Box.
2. Connect the black wire of the cable to the unswitched side of the Screen
Blanking Box.
3. Connect the D9 serial connector to either COM1 or COM2 serial port on the
dock.
User-Supplied Cable for Screen Blanking
A user-supplied cable can be used as well. Pins 7 and 8 must be connected as
detailed below. No other pins are to be connected.
The user-supplied cable is installed as follows:
DB9
Female
Function with Screen Blanking Box Wire color
1 -6, 9 Not Used
7 (RTS) Connected to Screen Blanking Box, unswitched
side
Black (see note)
8 (CTS) Connected to Screen Blanking Box, switched
side
Gray (see note)
DB9
Female
Function with Screen Blanking Box Function with Switch
1 -6, 9 Not Used Not Used
7 (RTS) Connected to Screen Blanking Box, unswitched
side
Connected to Switch
8 (CTS) Connected to Screen Blanking Box, switched side Connected to Switch
PIN7
PIN 8
PIN 5
PIN1