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 prepare the control panel 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 unit providing 24 V DC (-15 %/+20 %) from an isolated source is required for the power supply. This source must be protected by a UL 248 rated fuse with a maximum rating of 4 A.
Connect the control panel in the control cabinet according to standard EN 60204-1:2006 Protective Extra Low Voltage (PELV):
- 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.
Devices connected to the control panel with their own power supply must have the same potential for the PE "0 V" conductors as the control panel (no potential difference).