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3Tk2845-.Fb41/2/4 "Spring Force Interlocked Tumbler - Siemens 3TK2845 Manual

Safety relays, multifunction device
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5.6

3TK2845-.FB41/2/4 "Spring Force Interlocked Tumbler"

Brief description:
Monitoring an EMERGENCY-STOP control switch and protective door monitoring
with tumbler (spring force, locked when de-energized) according to Category 4,
EN 954-1.
Properties:
Stop category 0 according to EN 60204-1;
Two electronic enabling circuits;
Two floating enabling circuits;
One electronic signaling output;
U
24 V DC
s
Function:
Locked:
When the EMERGENCY-STOP control switch is activated, outputs 14, 24 (M1)
switch off. The outputs are switched back on again when the EMERGENCY-
STOP control switch releases, the protective door locks, the feedback circuit at
Y64 is closed and the START button Y34 is activated.
Enabled:
When the protective door enable Y28 is activated, outputs 14, 24 (M1) switch off
and outputs 38, 48 (solenoid control) are switched on with a time delay and the
protective door is released. When the protective door enable is activated once
again, outputs 38, 48 are switched off and the protective door is locked. Outputs
14, 24 (M1) can be switched back on again when the EMERGENCY-STOP con-
trol switch releases, the protective door locks, the feedback circuit at Y64 is
closed and the START button Y34 is activated. If the protective door is not ope-
ned when released, the device starts automatically after the door locks.
When the EMERGENCY-STOP control switch is activated and the protective
door enable is activated after the delay time set on the device has elapsed,
outputs 38, 48 are switched on immediately.
Notice
Sensor cables should be routed in a protected manner; only safety sensors with
positively-opening contacts may be used as sensors.
5-12
3TK2845 Multifunction Device Manual
GWA 4NEB 926 2087-22 DS 01

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