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60-144 VDC Vehicles (50-150 VDC Power Supply, Screws on Top of Lid)
This option requires DC/DC power supply Honeywell Part no. VX89303PWRSPLY, shown below.
If the DC/DC power supply does not have screws in the top of the lid, see 60-144 VDC Vehicles (50-150 VDC Power
Supply, Screws on Side of Lid) (page 4-23).
Power Cable Identification
The DC power cable is included with the dock:
Note: Correct electrical polarity is required for safe and proper installation. See Wiring Diagram (page 4-28) for
additional wire color-coding specifics.
The Thor VM3 DC input wires (Red, Red/White DC+ and Black, Black/White DC-) and the Blue ignition input wire are
galvanically isolated. The Green ground input is used for electrostatic discharge (ESD) protection.
Shown With Lid Attached
• Lid is secured with screws on the top of lid.
Shown With Lid Removed
• Input and output connector blocks under lid.
• Two positive (+), negative (-) and ground ( )
connections per terminal block
CAUTION - For installation by trained service personnel only.
CAUTION - The VX89303PWRSPLY power supply is sealed per IPXX. Usage in areas where moisture can affect
the power supply connections should be avoided. The power supply should be mounted in a dry location within
the vehicle or placed in a suitable protective enclosure.
Use caution when routing the power cable. See Power Cable Cautions (page 4-17).
Fuse Requirements
WARNING - For proper and safe installation, the input power cable must be connected to a fused circuit on the
vehicle. If the supply connection is made directly to the battery, the fuse should be installed in the positive lead
within 5 inches of the battery’s positive (+) terminal. Use VM3055FUSE (or equivalent) to install the fuse as
shown below:
•For all voltages, use the 3A fuse from the kit or a slow blow fuse that has a DC voltage rating greater than
the vehicle input voltage.
Note: For North America, a UL Listed fuse is to be used.
Wire Color Connection
Red DC + (10-60 VDC)
Red/White DC + (10-60 VDC)
Black DC -
Black/White DC -
Twist the red and red/white wires together and twist the
black and black/white wires together before connecting to
vehicle power.
Green Ground
Blue Ignition Input (not used)