User Manual

Application examples
13.2 Examples of two-hand operation console applications
SIRIUS ACT 3SU1 pushbuttons and signaling devices
272 System Manual, 02/2015, A5E03457306020A/RS-AB/002
Operating principle
By imposing the condition of simultaneous pressing of
both pushbuttons, the operator is restricted t
o the two-
hand operation console and is thus unable to reach
into the danger zone. The Modular Safety Sy
s
tem 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 Modular
Safety System immediately switches the machine off
in a safety
-related manner.
The four
-channel design in the two-hand operation
console ensures that possible welding of one of the
contacts is detected immediately.
After the emergenc
y stop devices are actuated, the
Start button must be used to restart.
Safety-related components
Two-hand operation console
Modular Safety System
Contactor
3SU18
3RK3
2x 3RT20