CES-A-BBA EUCHNER, CES-A-BBA Datasheet - Page 24

• Manufacturer Part Number: CES-A-BBA
• Description: ACTUATOR
• Manufacturer: EUCHNER

Specifications of CES-A-BBA

• External Depth: 40.5mm
• External Length / Height: 131mm
• Operating Temperature Max: 55°C
• Operating Temperature Min: -0°C

Non-Contact Safety Switches CES/CEM
Non-contact safety switches CES-A-C5...
Functional description
The Coded Electronic Safety switch CES comprises two
components:
The evaluation unit described in this chapter is integrated with the
read head in a standard housing according to IEC/EN 60947-5-2.
Thanks to the high degree of protection IP67, this switch can be
used directly on the safety guard in a very harsh environment.
Semiconductor technology allows for a compact design of the
evaluation unit and wear-free switching with a theoretically unlimited
number of operating cycles.
The information from the coded actuator is read by the evaluation
unit and processed at the same point. The transfer of static signals
(information on whether door open or closed) to the higher level
switchgear permits the use of connecting cables up to 300 m
long with the system.
Serial wiring, i.e. the cascading of several evaluation units, is
possible. In this way, you can implement decentralized wiring
concepts with the safety switch CES.
Specifically, the major advantage of the system is that the
positioning of the evaluation unit directly at the safety guard saves
space in the control cabinet.
The system operator can read the current state of the safety
switch on the two LED indicators (one with double function). If the
actuator is in the operating distance, the OUT LED illuminates
yellow. Even a possible fault in the evaluation unit is displayed by
a red LED. In service, the safety switch connected with an M12
plug connector can be replaced in seconds. The required approach
direction can also be set quickly on the compact housing. After
two fastening screws have been undone, the active face of the
read head can be set in 5 different positions.
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Standard housing according to IEC/EN 60947-5-
2, IP 67
Read head and evaluation unit integrated in the
standard housing
Semiconductor output
Connection of the safety circuit using M12 plug
connector
Coded actuator
Evaluation unit / read head
Subject to technical modifications; no responsibility is accepted for the accuracy of this information.
The non-contact safety switch CES-A-C5E... has a relatively large
operating distance of 20 mm. Compared with mechanical safety
switches, the assembly of the unit is much easier and the need
for precision in the door rails is also reduced considerably.
Therefore the assembly and maintenance costs are much lower.
The safety switch with integrated evaluation unit and read head 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 doors. When the switch-on 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
evaluation unit; if the data matches, the safety outputs
(semiconductor outputs) and the door monitoring output
(semiconductor output) are also set HIGH.
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 evaluation unit 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 door monitoring output (OUT) is switched
LOW. The state of the safety outputs is monitored internally by
two microprocessors.
On an internal fault in the evaluation unit, the safety circuit is
switched off and the OUT/ERROR LED illuminates red.
The evaluation unit has a redundant switching design with self-
monitoring. This means that the safety system is still effective
even if a component fails.