Observe The Potential Ratios - Advantech DLoG DLT-V72 Series User Manual

13.1.3. Observe the potential ratios

On the DLT-V72, the logic ground and the shield ground are firmly connected to each
other. Logic ground is the ground (GND) used to supply the internal parts and
components such as the display or CPU. All cable shields and the housing are connected
to shield ground.
Read more about this in manual chapter 12.2.2 Electrically isolated DLT-V72 mounting.
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
1. Always attach ring tongue of the supply voltage cable to the provided
2. In most installation cases, connect the other end of the yellow-green power
3. Connect the power supply cable of the DLT-V72 as directly as possible to
4. Connecting the DLT-V72 to large electrical loads, such as converters for
5. If you want to connect devices fed by other power sources to the DLT-V72
DLT-V72 Series User Manual V2.70
ground bolt situated on the connector panel.
supply cable to the vehicle's chassis.
ATTENTION:
In the following cases, the correct connection of the green-yellow cable
must be clarified individually from case to case:
- If you have a chassis connected to DC+.
- If you have a floating chassis.
the battery and not to power supply lines with a great deal of interference
(e.g. the engine power supply) or otherwise affected by consumers.
the forklift motor may result in random restarts, malfunctions and/or
irreparable damage to the device.
(e.g. printers), be sure to power up the peripheral devices at the same time
or after the DLT-V72; otherwise, you may encounter start-up problems,
malfunctions or even irreparable damage to the device.
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Electrical Installation