Chapter 2 — Installation Process
16 Vehicle Power Supply Installation Guide
Isolating the power supply from the vehicle chassis may provide
additional protection from other risks encountered on forklifts or
vehicles.
A fault condition like a wire shorting to the lift chassis may
present a power path that could negatively impact the power
supply and the Intermec computer, as well as any device
connected to the shorted wire. While this is an uncommon
secondary failure mode, you can avoid this by creating an
electrical isolation mount.
Creating a Custom Electrical Isolation Mount
There is no kit for isolated mounting solutions, as they are
custom to each vehicle installation. Your custom solution should
consist of:
• a metal plate 130-160 square inches (840 to 1030 square
centimeters) to provide the heat sink for the DC/DC supply.
• a means to mechanically attach this metal plate to the chassis
of the vehicle while preventing direct metal to metal contact.
• insulating hardware (plastic shoulder washers or rubber
isolators) or an insulating surface (plastic, wood, or rubber)
between the power supply and lift chassis.
Mounting the power supply on a metal plate also requires a small
resistor (~100 ohms/1W minimum) to be electrically connected
between the plate and the chassis of the vehicle to prevent static
charge buildup. The isolation hardware and resistor are also not
included in the installation kit. See Chapter 1 “Power Supply
Options” for more information.
Smaller metallic surfaces may be adequate when good air flow is
available or if the vehicle mount computer is to be used in a
refrigerated area. Mountings exposed to direct sun may require
more heat sink area.
Using a Standard Power Supply Mount
This installation kit includes the standard hardware for mounting
the power supply.
Use mounting Method A when you can easily access the back
side of the mounting location to install a lock nut and washer.
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