Psion Teklogix Vehicle-Mount Computer 8590 - Manual (Page 71)

8580/8590 Vehicle-Mount Computer User Manual 45
Chapter 4: 8580/8590 Installation
Installing Connecting Cables
Power is connected to the underside of the unit using a Phoenix Contact plug. There
is no power switch.
Important: In DC applications the 8580/8590 must only be connected to a
SELV (Safety Extra Low Voltage) circuit.
4
)
Ensure that there is a suitable disconnecting device such as a
power switch or circuit breaker in the power supply circuit.
Ensure that the disconnecting device isolates all supply voltage
lines. See Appendix B: Pin configuration.
The DC+/- connecting cables must be protected by a fuse (30AT
maximum).
The ignition connecting cables must be protected by a fuse of the
following type: 5x20mm T 125mA L/250V, for example, a Wick-
mann 195-125mA/250V.
4) The SELV circuit is a secondary circuit that is designed and protected so that its voltages
will not exceed a safe value both when operating correctly or if a single error occurs.
THERE ARE TWO POWER INPUT VERSIONS FOR THE 8580/8590;
SPECIAL PRECAUTIONS MUST BE CONSIDERED WHEN CONNECTING
POWER TO THE TERMINAL!
If 12V is connected to a 24/48 V 8580/8590, the vehicle-mount will not start up, but
the unit will not be damaged.
If 18V or more is connected to a 12V 8580/8590, the vehicle-mount WILL BE
DAMAGED; THE UNIT WILL NO LONGER FUNCTION.
4.3.2 Installing Connecting Cables
If possible, use the connecting cables supplied to connect the 8580/8590 to the
power supply. Make sure that the connecting cables are laid without kinks and are
protected.
4.4 Vehicle Applications (Such As Forklifts)
Pay special attention to the various electrical potentials when installing the unit on a
vehicle (such as a forklift). In the 8580/8590, the logic ground and the shield ground
are firmly linked.
The “logic ground” is the earth line (GND) for all of the internal electrical
components, such as the hard drive and the CPU.