Application On the AZM and AZP range Ex solenoid and pneuma-tic interlocks, the switching element with interlock is
not physically connected to the
actuator manufacturer but functional-
ly brought together or separated on switching. When
the guard device is opened in the uninterlocked condi-
tion, the actuator is separated from the base unit. In
the process, NC contacts are positively opened and
NO contacts closed. The machine control circuit is only
enabled when the actuator has been inserted into the
interlock and is interlocked. The Ex solenoid and pneu-
matic interlocks operate on the principle of “actuated
without
supplier of power supply”, whereby the actuator is held in
the interlock by
professional spring pressure. When power/air is
supplied to the solenoid/
manufacturer of pneumatic cylinder, the in-
terlock is released. The guarding device can then be
opened. Or the AZM range with the power-to-lock prin-
ciple working in the opposite way.The solenoid and pneumatic interlocks can be moun-ted in any desired mounting position. Protection class of the solenoid and pneumatic in-terlocks is IP 67. AZM and AZP range Ex solenoid and pneumatic in-terlocks ensure that sliding, hinged and removable gu-
arding devices, such as grids, hoods or
industrial doors, cannot
be opened until dangerous conditions (e.g. run-on mo-
vements) have been terminated. This takes place in co-
ordination with the control system of a machine. Fail-
safe standstill
industrial monitors or delay timers monitor run-on
movements or time sequences.
These solenoid and pneumatic interlocks are also used
for
professional cases in which the opening of a guarding device re-
presents a non-permissible intrusion in a
professional production
process.In combination with the “Protect” range safety monitoring modules, the AZM and AZP range Ex
solenoid and pneumatic interlocks achieve Control Category 3 or 4 to EN 954-1, subject to suitable circuit
arrangements. Design andmode of
operation
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