Electrical connection
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DLT-V83 Operating Instructions V2.00
14.2.1.
Important: Electrical connection of the DLT-V83 to vehicles
DANGER
Danger to life due to electric shock.
Ground the DLT-V83 in accordance with the vehicle manufacturer's instructions.
Observe the vehicle manufacturer’s instructions for connecting additional loads, for
example, in conjunction with an emergency shut-off switch.
Be sure that the connection of the power supply cables is as direct as possible to the
battery and not to power supply cables with a great deal of interference (e.g. the motor
power supply) or otherwise affected by consumers.
Electrical shock due to insufficient EMERGENCY shut-off of the vehicle.
If the EMERGENCY-OFF switch of the vehicle does not switch off the DLT-V83, there is a risk
of electrical shock.
Install the DLT-V83 and the EMERGENCY-OFF switch so that the DLT-V83 also switches
off when the EMERGENCY-OFF switch is operated.
Observe
: If a DLT-V83 with integrated UPS is installed in a vehicle, the EMERGENCY-OFF
switch of the vehicle has no effect on the DLT-V83. This also applies to the peripherals
supplied by the device.
14.2.2.
Electrical installation of DC devices
Pay special attention to the various electrical potentials when installing the unit on vehicles.
On the DLT-V83, the logic ground and the shield ground are firmly connected to each other.
The “logic ground” is the earth line (GND) for all of the internal electrical components, such as the
display and the CPU.
All cable shields and the housing are connected with the shield ground.
Some forklifts have a chassis that is connected to DC
+
. Therefore, the DLT-V83 chassis is also
connected to DC
+
. If peripheral devices supply DC
−
to the shield connection of the DLT-V83 by a
connection plug, for example over a serial connection, this will cause a short-circuit and malfunctions or
power failures will be unavoidable.
In DC-powered devices, always attach ring tongues on the supply voltage cable to the provided ground
bolt situated on the connector panel (see
Fig. 14.2: Position of the ground bolt
Ground bolt