Chapter 2 — Installing the Forklift Power Supply
PB50 and PW50 Forklift Power Supply Installation Guide 13
Directly mounting the power supply is the most straightforward
installation method. This installation is also preferred when there
is little risk for other forklift accessory devices making electrical
contact with the forklift chassis.
Electrically isolating the power supply from the chassis maintains
conformance to CE requirements. Isolating the power supply
from the vehicle chassis may provide additional protection from
other risks encountered on forklifts.
A fault condition, like a wire shorting to the forklift chassis, may
present a power path that could negatively impact the power
supply, the printer, and any device connected to the shorted wire.
Although this is an uncommon secondary failure mode, you can
avoid this situation by creating an electrical isolation mount.
Creating a Custom Electrical Isolation Mount
There is no kit for isolated mounting solutions since they are
unique to each forklift installation. Your custom solution should
consist of:
• a metal plate 840 to 1030 square centimeters (130 to 160
square inches) minimum to provide the heat sink for the DC/
DC supply.
• a way to mechanically attach the metal plate to the chassis of
the vehicle while preventing direct metal-to-metal contact
with insulating hardware.
• 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/1 watt 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.
Note: Lift vehicles in countries requiring CE Mark
certification and that have a connection between the
battery negative and the forklift chassis require
additional installation steps. To confirm this
requirement, consult the respective lift manufacturer.
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