Multi-axis controllers Wiring Devices in the range 2 ... 24 A (0.37 ... 11 kW) 5 5.5 5.5.3 IT system Stop! Overvoltage on components: On IT systems an earth fault in the installation can cause impermissible overvoltages. Possible consequences: Destruction of the device. Protective measures: If the devices are operated on IT systems, the internal connection of the filters to the protective earth in the installation backplane has to be disconnected. 1 2 SSP94IT001 Fig. 5.5-2 Plugging the IT insulating cap onto the earthing jumper Proceed as follows to disconnect the internal connection of the filters to the protective earth: 1. Remove the IT insulating cap from its parking position c .
– To do so, place a screw driver at the right or left side and lever off the insulating cap. – Alternatively, the insulating cap can be pulled off carefully using an appropriate pair of pliers. 2. Plug the IT insulating cap onto the earthing jumper d until it snaps into place. 5.5-5 EDS94SPP101 EN 3.1-04/2007