IFM AC903S, Оригинальная инструкция по эксплуатации, Страница: 7 / 23

7
UK
There is a rotatable camshaft in the head of the switch that is blocked/released
via the locking bolt� When the actuator is inserted/removed or when the guard
locking is activated/released the locking bolt is moved� The switching contacts are
activated�
When the camshaft is blocked (guard locking active) the actuator cannot be
drawn out of the switch head� For reasons of design, the guard locking can only
be activated if the protective equipment is closed (protected against incorrect
locking)�
Position monitoring of the safety guard and monitoring of interlocking are
performed via two separate contact elements (door monitoring contact SK and
solenoid monitoring contact ÜK)�
When the safety guard is closed and the guard locking is active, each AS-i safety
switch transmits a switch-specific unique safety code sequence comprising 8x4
bits via the AS-Interface bus� This code sequence is evaluated by an AS-Interface
safety monitor� The positively driven contact SK for door monitoring is represented
by the AS-Interface input bits D0 and D1� The solenoid monitoring contact ÜK is
represented by the AS-Interface input bits D2 and D3�
► Configure the safety switch in the AS-Interface safety monitor accordingly (refer
to the operating instructions of the AS-Interface safety monitor and the data bit
table)�
5.1 Actuator version
Actuator S for the AS-i safety switches AC903S/AC904S without insertion funnel�
5.2 Version AC903S (guard locking by spring force)
The locking bolt is held in locked position by spring force and is
electromagnetically released� The spring-interlocked guard locking operates
normally closed� In the event of interruption of the solenoid power supply the
safety guard cannot be opened immediately�
For process protection the interlocking solenoid can be switched by software via
the AS-Interface output bit D0�