CES-A-BBA EUCHNER, CES-A-BBA Datasheet - Page 30

• 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-S5...
Functional description
The non-contact safety switch CES-A-S5H-01 combines two diffe-
rent functions in one device:
The safety function is the same as the functionality of the EUCHNER
safety switch CES-A-C5H-01 in the compact housing with
semiconductor output employing proven transponder technology:
The identification function or position sensor in the device is
largely identical to the EUCHNER identification system CIS3 and its
proven read head CIT3PL:
Every position actuator has a number that is saved in the integrated
transponder.
For ease of use during installation and maintenance of the system,
laser marking is used to apply the related transponder number in
plain text to the housing of the position actuators. In addition, for
clear differentiation between the actuators, different housing colors
are used for safety actuators (red) and position actuators (green).
The related transponder number 2, 3, 4…9, A, B …F for the position
actuator (in total 14 different dogs) is signaled to the higher level
control system using the 4 semiconductor outputs D0, D1, D2, D3
in binary code. These data outputs have no safety function.
The position actuators cannot switch the safety outputs LA and LB.
The safety outputs on the switch are only activated by the current
safety actuator.
The safety actuator is always signaled on the data outputs as number
1 (0001)
(The no. 1 on the 4 data outputs corresponds to the OUT output on
the EUCHNER safety switches CES-A-C5…).
Using the binary code 0000 it is signaled that neither the safety
actuators nor a position actuator is within the operating distance of
the read head (see pulse diagram on page 35).
30
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
Safety function
Identification function/position sensor
Two safety semiconductor outputs LA and LB signal the presence
of a safety actuator and the closed position of the safety guard.
Every safety actuator is unique, the actuator can be used with
all non-contact EUCHNER safety switches CES.
Using 14 different position actuators, 14 different positions of
a moving guard can be detected.
Subject to technical modifications; no responsibility is accepted for the accuracy of this information.
Using 4 yellow LEDs (D0, D1, D2, D3) on the safety switch, the data
outputs currently set are indicated visually based on the actuators
within the operating distance.
The non-contact switch CES-A-S5H-01 has a large operating distance
of 20 mm for the safety actuators and the position actuators.
Compared to mechanical safety switches, significantly less effort is
required here for the adjustment of the door guide.
The maximum relative speed of the position actuator towards the
read head is extremely high and is max. 2.0 m/sec. To enable the
higher level control system to reliably detect the signals read, the
position actuators are "stretched" electronically, i.e. the signals remain
set on the data outputs D0, D1, D2, D3 for an additional delay of
approx. 0.2 seconds.
With conventional transponder systems, undefined states occur if
the transponder is at the edge of the operating distance. These
states manifest themselves in the form of irregular state changes
and the flickering of the optical indicators.
The EUCHNER safety switches CES are equipped with a special
internal circuit. This circuit provides exact operating points for the
approach and removal (with shutdown hysteresis) of the actuators
(transponder) with the following advantages:
If the actuator is positioned exactly at the limit of the switch-on
distance, vibrations at the safety guard will not cause the machine
to stop unintentionally.
A possible application example for the safety switch CES-A-S5H-01
is the monitoring of automatic roller doors.
Instead of fastening, adjusting and wiring several mechanical position
switches as well as two electromechanical safety switches, it is
only necessary to fasten the safety switch CES-A-S5H-01 (safety
category 4) to the stationary part of the safety guard and connect it
using a 12-pin plug connector.
The position actuators (dogs) are mounted at the necessary positions
of the moving part of the safety guard. The safety actuator is fitted
with the safety guard in the closed position. As a result the roller
door can be closed at high speed (max. 2.0 m/s). On the detection
of the last position actuator, the number of the actuator is forwarded
over the data outputs to the control system and the roller door
speed reduced. When the safety guard (roller door) is in the closed
position, the safety actuator is detected, the safety outputs on the
CES-A-S5H-01 switched and the system can be started.
The fastening and wiring effort for the mechanical position switches
is reduced to zero.
In addition, all further advantages of non-contact transponder
technology such as freedom from wear, large operating distance
with highly tolerant door guiding.
Reliable operation is ensured at all permissible movement
speeds
Sporadic failure to detect the transponder or the reading of
incorrect data is effectively prevented.