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2105267-10-08/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AH-C03-AE-LS
EN
6. Function
The safety switch
CES-AH-C03-AE-LS
complies with the following safety requirements:
Ì
Category 3 according to DIN EN ISO 13849-1
Ì
Redundant design of the circuit in the unit with self-monitoring
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This means that the safety system still functions even if an internal component fails
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The switching state of the semiconductor outputs is continuously monitored internally
The non-contact safety switch
CES
consists of three components: coded actuator, evaluation unit and read head.
The evaluation unit is integrated into a housing with the read head.
Each transponder actuator from EUCHNER features coding that far surpasses the requirements in EN ISO 14119 for a
type 4 switch with high coding level. The code in an actuator cannot be reprogrammed.
The actuator must be assigned to the safety switch by a teach-in operation so that it is detected by the system. This unam-
biguous assignment ensures a particularly high level of protection against tampering.
The safety switch with integrated evaluation unit and read head is fastened to the fixed part of the guard.
The actuator attached to the movable part of the guard is moved towards the read head fitted in the safety switch by closing
the door. When the operating distance is reached, power is supplied to the actuator by the inductive read head and data
can be transferred.
The bit pattern read is compared with the code saved in the safety switch. If the data match, the safety outputs are enabled.
Due to the combination of dynamic polling of the actuator and the redundant, diverse design of the safety electronics with the
two feedback switching elements for each safety output, the safety switch will enter the safe state with every detectable fault.
The safety outputs shut down the safety circuits if the guard is opened. The state of the safety outputs is monitored internally
by two microprocessors.
For the safety outputs to switch on, there must be a voltage of U
B
on the START input. This voltage can be supplied either
using a jumper (automatic start) or using a start button.
The safety switch has a redundant circuit design with self-monitoring. This means that the safety system is still effective
even if a component fails.
The system is designed so that a failure will not result in the loss of the safety function. The occurrence of failures is detected
by cyclic self-monitoring at the latest on the next demand to close the safety contacts (e.g. on starting).
