Euchner CES-AP-CL2-CH (Multicode) Instrukcja Użytkownika Pobierz pdf (Strona 6)

Operating Instructions Safety Switch CES-AP-C.2-CH

Function

The device complies with the following safety requirements:

 Ì Safety category 4, PLe according to EN ISO 13849-1

 Ì Redundant design of the circuit in the unit with self-monitoring

 Ì This means that the safety system still functions even if an internal component 

fails

 Ì The switch state of the semiconductor outputs is continuously monitored inter-

nally

 Ì Short circuit detection at the safety outputs by pulse signals

The following switch-on condition applies to safety outputs OA and OB (see also 

System status table and the section Typical system times):

 Ì Safety guard closed

The system consists of the following components: coded actuator (transponder) 

and switch.

Every EUCHNER actuator supplied has an electronic coding (unique coding) that is 

read by the read head. Only if a correct coding is detected does the system accept 

the actuator. The code in an actuator cannot be reprogrammed.

Unlike systems with unique code detection, on the CES-AP-C.2-CH a speciﬁc code is 

not polled but instead it is only checked whether the actuator is of a type that can 

be detected by the system (multicode detection). There is no exact comparison of 

the actuator code with the code deﬁned in the safety switch (unique code detection).

The safety switch is fastened to the ﬁxed part of the safety guard. 

The actuator attached to the  movable part of the safety guard is moved towards 

the read head ﬁtted in the safety switch by closing the door. When the switch-on 

distance is reached, power is supplied to the actuator by the read head by induc-

tion and data can be transferred.

If a permissible code is detected, the safety outputs are released.

Due to the combination of  dynamic  polling  of the actuator and the  redundant, 

diverse design of the safety electronics with the two feedback safety outputs, the 

safety switch will enter the safe state with every detectable fault. 

When the safety guard is opened, the  safety outputs switch off the safety circuit 

and the monitoring output OUT is switched off. The state of the safety outputs is 

monitored internally by two microprocessors. 

If faults are detected, the safety circuit is switched off and the DIA LED illuminates. 

In case of devices with a DIA monitoring output, the output is switched on. 

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 failures will not result in the loss of the safety func-

tion. 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). 

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Euchner CES-AP-CL2-CH (Multicode) Instrukcja Użytkownika Strona 6