User manual

Chapter 6: Peripheral Devices & 8515 Installations
Wiring Vehicle Power to the 8515
128 Psion Teklogix 8515 Vehicle-Mount Computer User Manual
(maximum 6A) accessory supply on the vehicle. When connecting a power pre-regulator to
a vehicle, please follow the instructions in the installation sheet (P/N 16435) supplied with
the extension cable.
The 8515 draws no more than 6A (less if the accessory supply is greater than 12V). Any ad-
ditional wiring (minimum 18 gauge), connectors or disconnects used should be rated for at
least 90 VDC, 10A.
The red lead of the power cable attaches to the positive vehicle supply. The black lead con-
nects to the negative supply—this should be connected to a proper terminal block and not to
the vehicle body. The 8515 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 prefera-
ble to wire the 8515 after the key switch—that is, the 8515 cannot be switched on without
turning the vehicle key on.
If an unfused power source must be used, a fuse assembly (P/N 19440-300) must be added
to the extension power cable (the fuse and instructions are supplied with the cable). Use only
a 6A 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.
6.6.3.1 Installing the Power Pre-regulator
1. Attach the pre-regulator cable with male connector to the Psion Teklogix extension
power cable P/N 13985-302, which has been installed on the vehicle.
2. Next, connect the pre-regulator cable with female connector either directly to the
8515 power cable, or to the extension power cable P/N 13985-303 (for screen
blanking option) (see Figure 6.12 — ‘With Power Pre-regulator’).
Important: The Psion Teklogix extension power cable P/N 13985-302 positive lead is
red and the negative lead is black.
It is recommended that all connections be secured with electrical tape or
heat shrink to prevent contaminants from degrading the connection.