Electrical installation 75Drives with additional I/O terminal block (option +L504): Ground the pair-cable shields andall grounding wires to the grounding clamp next to the terminal block as shown below.Leave the other ends of the control cable shields unconnected or ground them indirectlyvia a high-frequency capacitor with a few nanofarads, eg, 3.3 nF / 630 V. The shield canalso be grounded directly at both ends if they are in the same ground line with nosignificant voltage drop between the end points.Connect the conductors to the appropriate terminals (see page 81) of the control unit oroptional terminal block X504.Connecting the emergency stop push buttons (options +Q951)Connect the emergency stop push buttons to terminals according to the circuit diagramsdelivered with the drive.Connecting the external power supply cables for the cabinet heater and lighting andmotor heater (options +G300)See the circuit diagrams delivered with drive.Connect the external power supply wires for the cabinet heater to terminal block X300 atthe back of the mounting plate.12PE45NLX300PE1 Internal wiring of the cabinet heater: heateroff/fault = contact open.1
