Non-Contact Safety Switches CES - EUCHNER GmbH + Co. KG - #5

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General Subject to technical modifications; no responsibility is accepted for the accuracy of this information. Approvals To demonstrate conformity, the Machinery directive also includes the possibility of type examination. Although all relevant standards are taken into account during development, we subject all our switches to additional type examinations by a notified body. Many of the devices listed in this catalog have been tested by an employers' liability insurance association (BG) and are given in the lists from the BG. Furthermore, numerous devices are listed by Underwriters Laboratories (UL). These devices can be used in countries in which this listing is required. The approval symbols on the individual pages of the catalog indicate which body tested the switchgear. With the aid of the approval symbols listed below you can quickly see which approvals are available for the related devices: Devices with this symbol are approved by an employers' liability insurance association (Berufsgenossenschaft, BG) Devices with this symbol are approved by Underwriters Laboratories (UL, Canada and USA) Unicode evaluation With the unicode version, the actuators must be taught-in on the evaluation unit. During teach-in the actuator code is assigned to the evaluation unit. This code is saved in the evaluation unit. Whenever an actuator is read, the evaluation unit compares the code just read with the code saved. Only if the two bit patterns are identical, the actuator is recognized and the enable paths are closed. The number of possible teach-in operations is dependent of the evaluation unit used. Only the last actuator taught-in is detected. The unicode principle provides a high level of protection against tampering. Fixcode evaluation On version Fixcode devices, the teach-in operation is performed by EUCHNER before delivery. For this purpose, a specific actuator is allocated to the device. The device can only be operated with this particular actuator. No additional actuators can be taught. Multicode evaluation Unlike systems with unique code detection, with multicode evaluation a specific actuator code is not requested, instead it is only checked whether the actuator is of a type from EUCHNER that can be detected by the system (multicode detection). There is no exact comparison of the actuator code with the code saved in the evaluation unit. As a result a teach-in operation for actuators is not necessary. Safety switch On the safety switches, read head and evaluation unit are integrated into one housing. Their principle of operation does not differ from other CES systems. The safety switches are also available in unicode, multicode and fixcode versions. The advantage compared to evaluation with a separate evaluation unit is in the combination of the complete switch function in one compact housing. This feature makes possible decentral evaluation direct on-site. System families at a glance (see also page 8 and page 9) System family Locking Guard locking Guard lock monitoring Monitored start button Feedback loop Switch chain ATEX versions Short circuit monitoring (own clock signal) External clock signals allowed Safety system CES-AZ-… Safety switch CES-A-.5-... Safety switch CES-AH-... Safety switch CES-AR-… Max. 20 devices CET-AR-… Safety switch CES-AP-… Key to symbols Option available