Siemens 3TK2845, Manual

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Functional Information
3TK2845 Multifunction Device Manual
2-24
GWA 4NEB 926 2087-22 DS 01
2.2.5 3TK2845-.GB.. "Magnetic Force Interlocked Tumbler"
The 3TK2845-.GB.. has two sensor inputs (S1 EMERGENCY-STOP with
monitored start-up, S2 protective door with tumbler and monitored start-up), one
cascading input (CAS/OS with automatic start-up) as well as one door enable
input. On the output side there are one relay enable circuit and two electronic
enabling circuits as well as a relay solenoid control output and an electronic
signaling output.
Not enabled
If the protective door is not enabled, it cannot be opened. Cessation of the signal
at the inputs S1 or CAS/OS deactivates the enabling circuits (13, 14; 24).
Enabled
The solenoid control output and the second electronic enabling circuit are
deactivated via a signal to the door enable input after the delay time has passed.
This enables the protective door.
Safety logic
Not
enabled
Enabled
Table 2-11: Magnetic force interlocked tumbler (simplified representation)