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Range of application
These Ex safety switches with a separate actuator are suitable for sliding, hinged and particularly removable safety guards, which need to be closed to ensure the necessary operational safety. They are also suitable for mounting on profile sections and retrofitting on existing equipment.
In combination with a safety relay module series SRM, all safety switches shown in this chapter achieve PL "e" per EN ISO 13849-1 or up to SIL 3 per EN 62061, subject to suitable circuit arrangements.
The Ex switches are suitable for application in zone 1 and 2, as well as zone 21 and 22 according to ATEX 2014/34/EU.
Design and operating principle
On the Ex safety switches with a separate actuator, the switching element is not physically connected to the actuator, but functionally united or separated by switching. When the guard device is opened, the actuator is separated from the base unit. In this process, NC contacts are positively opened and NO contacts closed. A wide range of coded actuators is available for safety switches series Ex AZ 16, also suitable for small radii. Furthermore, lockout tags and different fixing mechanisms like latching magnets and ball catches can be ordered.
The degree of protection of all the safety switches is IP 65/67. The safety switches can be fitted in any desired mounting position.
All Ex safety switches shown in this chapter bear the CE mark according to the Machinery Directive 2006/42/EC and according to ATEX 2014/34/EU. The Ex safety switches per equipment category 3D bear the CE mark without the number of the notified body and have received a EU declaration of manufacturer conformity.