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Siemens SIRIUS ACT 3SU1 - Page 571

Siemens SIRIUS ACT 3SU1
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Application examples
16.2 Examples of two-hand operation console applications
SIRIUS ACT 3SU1 pushbuttons and signaling devices
System Manual, 08/2018, A5E03457306020A/RS-AK/010
571
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
wit
hin 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 but
ton
must be used to restart.
Safety-related components
Two-hand operation console
Safety relay
Input expansion
Contactor
3SU18 3SK1 3SK1 2x 3RT20

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