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Operating principle
By imposing the condition of simultaneous pressing of
both pushbuttons, the operator is restricted to the two-
hand operation console and is thus unable to reach
into the danger zone. The safety relay only switches
the enabling circuits when both signals are active
within 500 ms and the feedback circuit is closed.
If one of the two pushbuttons is released, the safety
relay immediately switches the machine off in a safety-
related manner.
After the emergency stop is actuated, the Start button
must be used to restart.
Safety-related components
Two-hand operation console
3SU18
SIRIUS ACT 3SU1 pushbuttons and signaling devices
System Manual, 08/2018, A5E03457306020A/RS-AK/010
16.2 Examples of two-hand operation console applications
Safety relay
Input expansion
3SK1
Application examples
Contactor
3SK1
2x 3RT20
571
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