Safety Systems CEM Read Heads

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Read heads CEM

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– With transponder coding

– Integrated solenoid (without monitoring of the guard locking)

– Up to category 4 / PL e according to EN ISO 13849-1 for monitoring the position of the safety guard

– Adjustable adhesive force optional

Design and functionality

A CES read head and a solenoid are integrated into the CEM read head. The CEM read head is connected to the CES evaluation unit with a round M8 plug connector. The CEM actuator of identical design also has a metal plate in addition to the transponder; this plate acts as an armature for the solenoid coil.

When the safety door is closed, the CEM actuator enters the operating distance of the CEM read head. The transponder signals are transferred, and then the evaluation unit closes the safety contacts and sets the OUT output “high”. By applying voltage to the solenoid for the CEM read head, strong magnetic forces can be generated between the coil (in the read head) and the armature (in the actuator).

Depending on the design, locking forces of approx. 500 N or 1000 N respectively are applied between the CEM actuator and the CEM read head. Practical experience has shown that these magnetic forces effectively prevent any opening, even if the user applies considerable effort.