Safety Integrated - Industry - Siemens

Ex. No.
1.2
Safe standstill for non-interlocked protective doors, Emergency Stop implemented using safety combinations
"Safe standstill" with MASTERDRIVES for a non-interlocked protective door with safety combinations, 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 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 corresponds 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.
■ Switches S4 and S5 are positively opening position
switches corresponding to EN 1088.
398 Functional Example No. MC-FE-I-001-V11-EN
■ The drive is shut down using the internal safety relay.
■ On circuits of safety combinations A1 and A2 monitor
whether line contactor K1 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!).