Connecting the control panel
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Risk of electric shock Dangerous touch voltages can lead to electric shock. To avoid electric shock, observe the following:
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To make the device ready for operation, you have to connect it. The first step is to ground the device. Then you can connect the cables and the power supply.
An external power supply providing 24 V DC from an isolated source is required. This must be protected by a fuse in accordance with UL 248 with a maximum nominal value of 4 A. A nominal voltage of at least 22 V must be applied to the power supply plug of the device at all times.
The cabling of the device in the control cabinet must be done in accordance with the standard EN 60204-1:2006 PELV = Protective Extra Low Voltage:
- The PE conductor (protective earth) and the "0 V" conductor of the voltage source must be on the same potential (connected in the control cabinet).
- Standard EN 60204-1:2006, section 6.4.1:b stipulates that one side of the circuit, or a point of the energy source for this circuit must be connected to the protective conductor system.
Peripheral devices connected to the device with their own power supply must have the same potential for the PE and "0 V" conductors (no potential difference).