DC/DC Power Supply Installation Instructions
For use with the models listed below. These models can be identified by a lid with screws on the side of the lid.
9000311PWRSPLY – Power Supply, 9-60VDC, 60W
The DC/DC power supplies above may be used to replace the following earlier model power supplies (depending on voltage range).
These power supplies can be identified by a lid with screws on the top of the lid. Contact Honeywell Technical Support or go to
for DC/DC power supply installation instructions for the models listed below. When replacing one of these ear-
lier power supplies, refer to Figure 5 for information.
VX89301PWRSPLY – Power Supply, DC/DC, 9 to 36V
VX89A302PSDC48V – Power Supply, DC/DC, 18 to 60V
VX89303PWPSPLY – Power Supply, DC/DC, 60 to 110V
For proper and safe installation, the input power cable must be connected to a fused circuit on the vehicle. This fused circuit
requires a user supplied 5 or 10 Amp maximum time delay (slow blow, see table above for fuse rating) high interrupting
rating fuse. 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 positive (+) terminal.
Caution: 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
For installation by trained service personnel only.
Warning: Risk of ignition or explosion. Explosive gas mixture may be vented from battery. Work only in well ventilated area. Avoid
creating arcs and sparks at battery terminals.
Preparing for Installation
The DC/DC power supply is used to power certain Vehicle-Mount Computers (VMCs) or to provide vehicle power to certain Hand-Held
Computers (HHCs) when placed in a DC powered vehicle dock or cradle.
Specifications for electrical supply
Always observe input voltage range specified for the DC/DC power supply and the optional screen blanking box (for
vehicle mounted terminals only).
Output Voltage 13.2 VDC ± 10%
Tecton, MX9: Use a 5 A slow blow fuse.
Thor VX8, Thor VX9, Marathon: Use a 10 A slow blow fuse
Thor VM1, Thor VM2, Thor VM3: Use VM3055FUSE (or equivalent) to install the fuse as shown below:
• For 12VDC input, use the 10A fuse from the kit or a slow blow fuse that has a DC voltage rating greater than 12VDC.
• For 24VDC input, use the 6A fuse from the kit or a slow blow fuse that has a DC voltage rating greater than 24VDC.
• For 36VDC input, use the 4A fuse from the kit or a slow blow fuse that has a DC voltage rating greater than 36VDC.
• For 48VDC input, use the 3A fuse from the kit or a slow blow fuse that has a DC voltage rating greater than 48VDC.
Screen Blanking Box: Use a 3 A fuse
Please refer to the appropriate wiring schematic on the following pages for wiring colors and connections:
Figures 1a and 1b – Thor VM1, Thor VM2 and Thor VM3 Vehicle Mounted Computers
Figures 2a and 2b – Thor VX8 and Thor VX9 Vehicle Mounted Computers
Figure 3 – Marathon Vehicle Dock
Figure 4 – Tecton and MX9 Vehicle Mounted Cradles
Figure 5 – Replacing an Earlier Model Power Supply
Figure 6 – Connecting Other Devices
Figure 7 – Mounting Template
50118845-001 Rev B 10/15
9000313PWRSPLY – Power Supply, 50-150VDC, 60W
9000301PWRSPLY – Power Supply, 18-60VDC with cable
9000302PWRSPLY – Power Supply, 60-110VDC with cable
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