Electrically Isolated Dlt-V72 Mounting - Advantech DLoG DLT-V72 Series User Manual

12.2.2. Electrically isolated DLT-V72 mounting

Due to a variety of technical properties of forklifts and forklift trucks, it can be necessary
to electrically isolate DLT-V72 from the chassis of the vehicle to prevent malfunctions.
The necessity of this must be studied on a case-by-case basis, however, it is
recommended for vehicles with potential-free chassis. For example, using rubber buffers
ensures that the terminal has no electrically conducting connection to the vehicle
chassis.
Measures:
1. If peripheral equipment (such as scanners, printers, scales or similar), which
has its own power supply unit is used, you must ensure that the power supply
units of these peripherals are galvanically separated from the supply of the
vehicle.
2. Moreover, the peripheral equipment and its cabling must be attached
electrically isolated.
3. If external antennas are being used, you must ensure that the antennas are
isolated at the mounting point on the vehicle chassis.
DANGER
DLT-V72 Series User Manual V2.70
Risk of accident on vehicles due to unexpected vehicle
emergency stop because of electro-conductive connection of
the DLT-V72 to the vehicle chassis.
1. Some vehicles have a chassis that is connected to DC+.
Therefore, the DLT-V72 chassis is also connected to DC+.
If the ground potential of a peripheral device is "DC -", short
circuits can occur. This will inevitably lead to malfunctions or
even a total system failure.
2. Most electrically driven forklift vehicles have a floating chassis,
connected to neither DC+ nor DC-. In the case of an error,
either the plus or the minus potential could be connected to the
chassis via low resistance paths. For this reason all connected
peripherals must be attached isolated
3. Make sure that the DLT-V72 power supply cable is attached as
close to the battery as possible.
4. Do not connect the power supply cable to supply lines that are
severely disturbed (e.g. motor supply) or that are otherwise
burdened by consumers.
Connecting the DLT-V72 to large electrical loads, such as
converters for the forklift motor may result in random restarts,
malfunctions and/or irreparable damage to the device.
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Mechanical Installation