Safety Integrated - Industry - Siemens

Ex. No.
2.2
Safe standstill for non-interlocked protective doors, Emergency Stop implemented using safety combinations
"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 EN954-1 control Category 3 and
EN1037 can be implemented using two SIGUARD safety combinations
for Emergency Stop and protective doors. The drive is
shut down (stopped) according to stop function Category 1 according
to EN 60204-1.
■ Safety combinations for Emergency Stop and protective
door monitoring functions correspond to Category 4
(instantaneous enable circuit) or Category 3 (delayed
enable circuit).
■ Circuits for Emergency Stop and protective door monitoring
are monitored through 2 channels in a cross-circuit proof
fashion.
414 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.
■ On circuits of safety combinations A1 and A2 monitor
whether the internal line contactor of the rectifier unit has
dropped-out after Emergency Stop or whether time relay
K2a and contactor K3 have dropped-out after the protective
door circuit has been opened (this is necessary in the sense
of control Category 3 according to EN 954-1!).