Wiring Vehicle Power To The Cradle - Psion Teklogix 7535 User Manual

Chapter 7: Peripheral Devices & Accessories

Wiring Vehicle Power To The Cradle

This grounding strap ensures that if there is a fault in the vehicle wiring or in the
picker cradle power module, the picker cradle cannot be at a hazardous voltage with
respect to the vehicle chassis.
Connection between the picker cradle ground lug and the vehicle chassis should be
done with a 16 gauge ground strap (ground wire). Connect the ground strap to the
picker cradle utilizing the ground lug hardware supplied with the picker cradle and a
#10 heavy duty wire crimp ring terminal. Torque the ground lug hardware to 23.0
+/- 2.0 in-lbs. Connect the other end of the ground strap to a solid, reliable point on
the main portion of the vehicle chassis, ensuring a solid electrical connection.
As with other vehicle cables, the routing of the ground strap should be carefully
considered to ensure it does not pose a hazard to the operator or the safe operation of
the vehicle. If necessary, secure the ground strap with cable ties or some other
mechanical means to prevent loops or loose lengths of wire that could catch on
stationary items when the vehicle is in motion.
7.11.6.1 Wiring Vehicle Power To The Cradle
A 1.8 meter (6 foot) extension power cable (PN 13985) is supplied with your power
cradle. This cable should be wired to a filtered, fused (maximum 10A) accessory
supply on the vehicle. The power cradle draws no more than 8A (less if the
accessory supply is greater than 12V). Any additional wiring, connectors or
disconnects used should be rated for at least 10A.
The red lead of the power cable attaches to the positive vehicle supply. The black
lead connects to the negative supply – this should be connected to a proper terminal
block and not to the vehicle body. The power cradle is fully isolated and can be used
with both negative and positive chassis vehicles.
You may have the option of connecting power before or after the 'key' switch. It is
preferable to wire the power cradle after the key switch – that is, it cannot be turned
on without the key on. However, if the operator switches the key off repeatedly for
long periods during a shift, it may make more sense to wire the cradle before the
switch.
Keep in mind that the 7535/7530 will continue to operate with or without vehicle
power as long as its battery has sufficient charge.
If an unfused power source must be used, a fuse assembly (PN 19440) must be
added to the extension power cable (the fuse and instructions are supplied with the
cable). Use only a 10A slow blow UL approved fuse in the fuse assembly.
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Psion Teklogix 7535/7530 Hand-Held Computer User Manual