Users Manual Chapter 5

90 Thor VM3A Vehicle-Mounted Computer
• GND is connected to the vehicle chassis ground, which can also be battery
negative
14. While observing the Fuse Requirements 50-150VDC Power Supply, Screws on
Side of Lid connect the power cable as close as possible to the actual battery
terminals of the vehicle. When available, always connect to unswitched
terminals in the vehicle fuse panel, after providing proper fusing.
15. Use proper electrical and mechanical fastening means for terminating the
cable. Properly sized “crimp” type electrical terminals are an accepted method
of termination. Select electrical connectors sized for use with 18AWG (1mm
2
)
conductors.
16. Provide mechanical support for the cable by securing it to the vehicle structure
at approximately one foot intervals, taking care not to over tighten and pinch
conductors or penetrate the outer cable jacket.
17. Connect the watertight connector end of the power cable to the dock power
connector by aligning the connector pins to the power connector; push down
on the watertight connector and twist it to fasten securely. Flip the power switch
on the back of the dock to On.
18. Secure the power cable to the computer using the Strain Relief Cable Clamps.
19. Place Thor VM3A in the Dock.
20. If using the Screen Blanking Installation feature, install the screen blanking box
or switch.
21. Power On the Computer.
Once installation is complete, remember to start the computer and configure the
Power Mode.
See the Auto-On control panel.
Note: Ignition control is not available for trucks over 60VDC.
Caution: For uninterrupted power, electrical supply connections should not be
made at any point after the ignition switch of the vehicle.