Siemens SINUMERIK 840D sl Manual page 182

Signal Interconnection
6.5 Application 5
Line contactor control
Note
The SINAMICS ("Safe Standstill" and "Safe Brake Control") safety functions satisfy the
requirement for safety integrity level 2 (SIL2) in accordance with IEC 61508. This
corresponds to the control category 3 in accordance with DIN EN 954-1 and DIN VDE 0801.
The "Safe Standstill" function prevents an unwanted starting from standstill of the motor
connected to the drive device.
The need for a line contactor for the safe separation of the energy supply to the motor is no
longer assured.
The line contactor must be controlled from an external PLC or hardware controller. An
internal line contactor control using a Drive Object by the NCU is not possible.
The following activation/deactivation conditions must be observed for the control (also see
the "Line Contactor Control" chapter):
PLC input signal
● "Line contactor feedback"
PLC output signal
● "Line contactor control"
6-14
The Smart Line Module without DRIVE-CLiQ interface is not switched on/off using a Drive
Object of the NCU. The control is performed exclusively using terminals on the Smart
Line Module, for example, from a PLC or hardware controller.
Note
The ""Infeed Ready" signal must also be locked by the safety controller.
Query the switching state of the line contactor
Control the line contactor using the input/output condition
Caution
If the named conditions are not observed, the line contactor and the infeed can be
damaged.
Notice
The described control must be locked by the safety controller in accordance with the
required safety category.
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0