CES-A Auswertung

Door monitoring outputs
Start button
Feedback loop
Unicode or multicode evaluation units

more information

CES evaluation units combine transponder evaluation and a safety relay in one device

The CES evaluation units have two enable paths and monitoring outputs for each read head connected. Depending on the series, the devices have additional monitoring outputs as well as connections for a monitored Start button and feedback loop.

Start button

Evaluation units with a connection for a Start button permit a monitored, manual start. The relay is started by actuating a button. The button is monitored for jamming or possible tampering (monitoring of the falling edge). Prior to starting the evaluation unit, the safe state of the safety components connected must be re-established.

Feedback loop

Components connected downstream of the safety relay can be monitored for correct function. For this purpose normally closed contacts on these components are integrated into the feedback loop on the evaluation unit.

Unicode evaluation units

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.

Multicode evaluation units

Unlike systems with unique code detection, with multicode evaluation units 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 is not necessary.

Evaluation unit CES-A-ABA.../CES-A-UBA... (for 1 read head)

1 read head can be connected
2 safety contacts (relay contacts)
1 internal normally open contact per safety contact
Unicode and multicode evaluation unit
Category 3 / PL e according to EN ISO 13849-1

Unicode evaluation unit

Each actuator is unique. The evaluation unit detects only the actuator that has been taught-in. Max. 8 actuators can be taught-in.

Only the last actuator taught-in is detected.

Multicode evaluation unit

Every suitable actuator is detected by the evaluation unit.

Category according to EN ISO 13849-1

Due to two redundant relay outputs (safety outputs) with internally monitored contacts, suitable for:

Category 3 / PL e according to EN ISO 13849-1

To achieve the stated category, both safety contacts must always be evaluated.

Operating distance

The standard version of the evaluation unit (CES-A-…-01B) has a large operating distance that, e. g., permits larger tolerances in the alignment of read head and actuator. Wherever a smaller operating distance is required, the version with reduced operating distance (CES-A-…-01) can be used.

TST	Input for self-test
OUT	Monitoring output (semiconductor)
ERR	Diagnostics output
GND	Connected internally to 0V (not for high currents)

Order numbers:

Unicode

071 850 CES-A-ABA-01
083 513 CES-A-ABA-01B

Multicode

096 960 CES-A-UBA-01
096 961 CES-A-UBA-01B

Evaluation unit CES-A-ABA.../CES-A-UBA...

Dimension drawing

Block diagram

Evaluation unit CES-A-ABA... ATEX (for 1 read head)

1 read head can be connected
2 safety contacts (relay contacts)
1 internal normally open contact per safety contact
Unicode evaluation unit
Category 3 / PL e according to EN ISO 13849-1