Psion Teklogix Vehicle-Mount Computer 8590 - Manual (Page 73)

8580/8590 Vehicle-Mount Computer User Manual 47
Chapter 4: 8580/8590 Installation
Wiring Vehicle Power To The 8580/8590
4.4.1 Wiring Vehicle Power To The 8580/8590
Warning: Applying a voltage above the input voltage rating or reversing
polarity may result in permanent damage to the 8580/8590 and will
void the product warranty.
A 1.8 meter (6 ft.) extension power cable (PN 13985–301) is supplied with your.
This cable should be wired to a filtered, fused (maximum 10A) accessory supply on
the vehicle. Any additional wiring (minimum 18 gauge), connectors or disconnects
used should be rated for at least 90 VDC, 10A.
When connecting PN 13985-301, ensure that the screen blanking wires (clearly
labelled) and the power wires (red/black leads) are reliably secured away from each
other, or are separated with reliably secured certified insulation. Minimum 2.8mm
distance, or 0.4mm distance through insulation is required for the separation.
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 8580/90 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 8580/8590 after the key switch – that is, the 8580/8590 cannot
be switched on without turning the vehicle 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 8580/90 before the switch.
Keep in mind that the 8580/8590 will continue to operate with or without vehicle
power as long as its backup 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. The fuse
assembly must be located as close as practical to the DC supply, and shall connect to
the positive side of the DC supply.