Siemens SINAMICS S120 Installation And Start-Up Manual page 176

SINAMICS Safety Integrated (Booksize)
Application examples
Switching on the drives
The drives can be started when the protective door is shut and emergency off but-
ton S3 is released. The Line Module must be switched on via PLC output DO5 by
means of an edge from "0" to "1".
S Once you have pressed button S1 ("ON"), safety combination A1 switches to
"ready for operation". When PLC output DO 4 is reset, the coil of tumbler Y1 is
no longer energized and the protective door is locked. Safety combination A2 is
also ready for operation.
S When PLC outputs DO 2 and DO 3 are set simultaneously, the "Safe standstill"
safety function is deselected via two channels via terminal X122.3 on the
Control Unit and terminals X21.3 (EP +24 V) and X21.4 (EP M) on the Motor
Modules. The fast stop function is also deselected at terminal X122.2 (DI 1: 2.
OFF3).
S Due to a rising edge at PLC output DO1, the drives can be switched back to
operation mode via terminal X122.1 (DI 0: OFF1).
Miscellaneous:
Due to the shutdown of the outputs as a result of the test (downtime < 1 ms), cate-
gory 4 safety combinations with electronically safe outputs (e.g. 3TK28 41/42) can-
not be connected directly to the drive terminals.
5-176
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition