7
INSTALLATION AND ELECTRIC CONNECTIONS
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The AU S-TWIN control unit must be installed in an environment with at
least IP54 protection.
F
The control unit The control unit must be supplied with PELV type 24Vdcmust be supplied with PELV type 24Vdc
±20% power supply (e.g. through an isolating transformer±20% power supply (e.g. through an isolating transformer
conforming to EN 60742).conforming to EN 60742).
Connection of photoelectric safety sensors.Connection of photoelectric safety sensors.
Two type 2 photoelectric safety barriers or up to 4 single beam sensors
can be connected to the AU S-TWIN control unit.
A barrier and one or two single beam sensors can also be connected.
In case of only one safety barrier being required, this must be connected
to terminals 17, 18, 19 and 20. Terminals 3 and 4 for the second barrier
are not connected.
If one or two single beam sensors are used, these can both be connected
to terminals 17 and 20 (cascade connection) or one to terminals 17 and
20 and the other to terminals 3 and 4.
Four single beam sensors are connected in pairs to terminals 17, 20 and
3, 4 respectively (cascade connection).
If a safety barrier and one or two single beam sensors are used, the
barrier must be connected to terminals 17, 18, 19 and 20, the sensors to
terminals 3 and 4.
Test command.Test command.
• The test command must be sent to the control unit by short-circuiting
terminals 15 and 16. An N/O external control button which, when
temporarily closed, generates the test cycle command, can be used for
this purpose.
• The contact closing time must not be less than 10ms. This is
especially important if the test command is to be sent
automatically, by means of a PLC, for instance.
• Once the test cycle has been actuated, the system will be reset within
100 ms. This means that, in the event of a successful test, the output
circuit cannot be made before this time.
• The contact used for the test must be capable of switching 24V
dc
and 20mA.
• In case of manual test command actuation, the control must be
located outside the danger zone in a place from which the
operating area is clearly visible.
• The control must not be accessible from inside the danger zone.
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