Chapter 3: Power Supply; Power Supply; Safety Considerations; Wiring The Power Supply - Unitronics Vision 120 OPLC User Manual

Chapter 3: Power Supply

Power Supply

The controller requires an external 12 or 24VDC power supply. The permissible input
voltage range is listed in the technical specifications sheet supplied with the controller. You
must use an external circuit protection device as shown in Figure 7, page 14.

Safety Considerations

Wiring the Power Supply

•
Do not touch live wires.
•
A non-isolated power supply can be used provided that a
0V signal is connected to the chassis.
•
Standard safety considerations require that metal cabinet
panels be earthed to avoid electrocution.
•
Do not connect either the 'Neutral or 'Line' signal of the
110/220VAC to the device's 0V pin.
•
In the event of voltage fluctuations or non-conformity to
voltage power supply specifications, connect the device to
a regulated power supply.
•
The wiring of this device is specifically designed to be safe
and easy. A technician or engineer trained in the local and
national electrical standards should perform all tasks
associated with the electrical wiring of the device.
•
Double-check all wiring before turning on the power
supply.
•
Do not use tin, solder or any other substance on the
stripped wire that might cause the wire strand to break.
•
Install at maximum distance from high-voltage cables and
power equipment.
•
To avoid damaging the wire, do not exceed a maximum
torque of 0.5 N·m (5 kgf·m).
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