Safety Integrated - Industry - Siemens

Ex. No.
2.4
Safe standstill for non-interlocked protective doors, implemented with one safety combination
"Safe standstill" with SIMODRIVE for a non-interlocked protective door with safety combination, stop Category 1, Category 3 acc. to EN 954-1
Function description
A structure in compliance with EN 954-1 control Category 3 and
EN1037 can be implemented using one SIGUARD safety combination
for the protective doors. The drive is shut down (stopped)
according to stop function Category 1 according to EN 60204-1.
■ Safety combination for protective door monitoring functions
corresponds to Category 4 (instantaneous enable circuit)
or category 3 (delayed enabled circuit).
■ Circuit for protective door monitoring is monitored through
2 channels in a cross-circuit proof fashion.
418 Functional Example No. MC-FE-I-002-V11-EN
■ Switches S4 and S5 are positively opening position
switches corresponding to EN 1088.
■ The drive is shut down via the internal safety relay and the
internal line contactor of the rectifier unit.
■ The on circuit of safety combination A1 monitors whether
the internal line contactor of the rectifier unit and the internal
safety relay of the drive as well as contactor K1 have
dropped-out after the protective doors have opened. (This
is necessary in the sense of control Category 3 in compliance
with EN 954-1!).