EUCHNER CES-AR-C 2 Series User manual

EN
Operating Instructions
Non-Contact Safety Switch
CES-AR-C.2-… (Unicode/Multicode)

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
2(Translation of the original operating instructions) 2109309-09-03/20
Contents
1. About this document............................................................................................. 4
1.1. Scope............................................................................................................................................4
1.2. Target group ..................................................................................................................................4
1.3. Key to symbols...............................................................................................................................4
1.4. Supplementary documents ..............................................................................................................4
2. Correct use .......................................................................................................... 5
3. Description of the safety function .......................................................................... 6
4. Exclusion of liability and warranty ......................................................................... 6
5. General safety precautions ................................................................................... 6
6. Function............................................................................................................... 7
6.1. Door monitoring output ...................................................................................................................7
6.2. Diagnostic output ...........................................................................................................................7
6.3. Limit-range monitoring ....................................................................................................................7
6.4. Switching states .............................................................................................................................7
7. Mounting.............................................................................................................. 8
8. Electrical connection ............................................................................................ 9
8.1. Notes about .........................................................................................................................10
8.2. Safety in case of faults..................................................................................................................10
8.3. Fuse protection for power supply...................................................................................................10
8.4. Requirements for connecting cables...............................................................................................11
8.5. Maximum cable lengths.................................................................................................................11
8.5.1. Determining cable lengths using the example table.............................................................12
8.6. Connector assignment of safety switch CES-AR...............................................................................13
8.7. Connector assignment of Y-distributor............................................................................................14
8.8. Connection of a single AR device ...................................................................................................15
8.9. Connection of several devices in a switch chain ..............................................................................16
8.10. Information on operation on an AR evaluation unit............................................................................18
8.11. Notes on operation with safe control systems.................................................................................18
9. Setup ................................................................................................................. 20
9.1. LED displays ................................................................................................................................20
9.2. Teach-in function for actuator (only for unicode evaluation) ...............................................................20
9.2.1. Preparing device for the teach-in operation and teaching-in actuator ....................................20
9.2.2. Teach-in function with series connection, replacing and teaching in device ............................21
9.3. Functional check...........................................................................................................................21
9.3.1. Electrical function test......................................................................................................21

3
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
10. System status table ............................................................................................ 22
11. Technical data .................................................................................................... 23
11.1. Technical data for safety switch CES-AR-C.2-… ...............................................................................23
11.1.1. Typical system times........................................................................................................24
11.1.2. Dimension drawing of safety switch CES-AR-C.2-… .............................................................25
11.2. Technical data for actuator CES-A-BLN-… .......................................................................................26
11.2.1. Dimension drawing...........................................................................................................26
11.2.2. Operating distances .........................................................................................................27
11.2.3. Typical actuating range.....................................................................................................27
11.3. Technical data for actuator CES-A-BDN-06 ......................................................................................28
11.3.1. Dimension drawing...........................................................................................................28
11.3.2. Operating distances .........................................................................................................28
12. Ordering information and accessories................................................................. 29
13. Inspection and service ........................................................................................ 29
14. Service .............................................................................................................. 29
15. Declaration of conformity ................................................................................... 30

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
4(Translation of the original operating instructions) 2109309-09-03/20
1. About this document
1.1. Scope
These operating instructions are valid for all CES-AR-C.2-… These operating instructions, the document Safety information
and any enclosed data sheet form the complete user information for your device.
1.2. Target group
Design engineers and installation planners for safety devices on machines, as well as setup and servicing staff possessing
special expertise in handling safety components.
1.3. Key to symbols
Symbol/depiction Meaning
Printed document
Internet
www Document is available for download at www.euchner.com
DANGER
WARNING
CAUTION
Safety precautions
Danger of death or severe injuries
Warning about possible injuries
Caution slight injuries possible
NOTICE
Important!
Notice about possible device damage
Important information
Tip Useful information
1.4. Supplementary documents
The overall documentation for this device consists of the following documents:
Document title
(document number) Contents
Safety information
(2525460) Basic safety information
Operating instructions
(2109309) (this document)
Internet
www
Possibly enclosed data
sheet Item-specic information about deviations or additions
Important!
Always read all documents to gain a complete overview of safe installation, setup and use of the
device. The documents can be downloaded from www.euchner.com. For this purpose enter the doc.
no. in the search box.

5
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
2. Correct use
Safety switches series CES-AR are interlocking devices without guard locking (type4). The device meets the requirements
according to ENIEC60947-5-3. Devices with unicode evaluation possess a high coding level, devices with multicode eval-
uation possess a low coding level.
In combination with a movable guard and the machine control, this safety component prevents dangerous machine functions
from occurring while the guard is open. A stop command is triggered if the guard is opened during the dangerous machine
function.
This means:
ÌStarting commands that cause a dangerous machine function must become active only when the guard is closed.
ÌOpening the guard triggers a stop command.
ÌClosing a guard must not cause automatic starting of a dangerous machine function. A separate start command must
be issued. For exceptions, refer to ENISO12100 or relevant C-standards.
Before the device is used, a risk assessment must be performed on the machine, e.g. in accordance with the following
standards:
ÌENISO13849-1
ÌENISO12100
ÌIEC62061
Correct use includes observing the relevant requirements for installation and operation, particularly based on the following
standards:
ÌENISO13849-1
ÌENISO14119
ÌEN60204-1
The safety switch is only allowed to be operated in conjunction with the intended EUCHNER CES actuators and the related
connection components from EUCHNER. On the use of different actuators or other connection components, EUCHNER
provides no warranty for safe function.
Connection of several devices in an AR switch chain is permitted only using devices intended for series connection in an AR
switch chain. Check this in the instructions of the device in question.
A maximum of 20 safety switches are allowed to be operated in a switch chain.
Important!
ÌThe user is responsible for the proper integration of the device into a safe overall system. For this
purpose, the overall system must be validated, e.g. in accordance with ENISO13849-2.
ÌIt is only allowed to use components that are permissible in accordance with the table below.
Table 1: Possible combinations for CES components
Safety switch
Actuator
Door hinge right Door hinge left Usage independent of position of door hinge
CES-A-BLN-R2-100776
100776
CES-A-BLN-L2-104510
104510
CES-A-BLN-U2-103450
103450
CES-A-BDN-06-104730
104730
Door hinge right
CES-AR-CR2-…
Door hinge left
CES-AR-CL2-…
Key to symbols Combination possible

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
6(Translation of the original operating instructions) 2109309-09-03/20
NOTICE
Devices with version number V1.1.2 or higher can be operated on an AR evaluation unit. Refer to the
operating instructions for the relevant AR evaluation unit for more information.
3. Description of the safety function
Devices from this series feature the following safety functions:
Monitoring of the guard position
(interlocking device according to ENISO14119)
ÌSafety function:
- The safety outputs are switched off when the guard is open (see chapter 6.4. Switching states on page 7).
ÌSafety characteristics: category, Performance Level, PFHD (see chapter 11. Technical data on page 23).
4. Exclusion of liability and warranty
In case of failure to comply with the conditions for correct use stated above, or if the safety regulations are not followed,
or if any servicing is not performed as required, liability will be excluded and the warranty void.
5. General safety precautions
Safety switches fulll personnel protection functions. Incorrect installation or tampering can lead to fatal injuries to personnel.
Check the safe function of the safeguard particularly
Ìafter any setup work
Ìafter the replacement of a system component
Ìafter an extended period without use
Ìafter every fault
Independent of these checks, the safe function of the safeguard should be checked at suitable intervals as part of the
maintenance schedule.
WARNING
Danger to life due to improper installation or due to bypassing (tampering). Safety components fulll
a personnel protection function.
ÌSafety components must not be bypassed, turned away, removed or otherwise rendered ineffec-
tive. On this topic pay attention in particular to the measures for reducing the possibility of bypass-
ing according to ENISO14119:2013, section 7.
ÌThe switching operation must be triggered only by actuators designated for this purpose.
ÌPrevent bypassing by means of replacement actuators (only for multicode evaluation). For this
purpose, restrict access to actuators and to keys for releases, for example.
ÌMounting, electrical connection and setup only by authorized personnel possessing the following
knowledge:
- specialist knowledge in handling safety components
- knowledge about the applicable EMC regulations
- knowledge about the applicable regulations on operational safety and accident prevention.
Important!
Prior to use, read the operating instructions and keep these in a safe place. Ensure the operating
instructions are always available during mounting, setup and servicing. For this reason you should
archive a printed copy of the operating instructions. You can download the operating instructions from
www.euchner.com.

7
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
6. Function
The safety switch monitors the position of movable guards. The safety outputs are switched on/off when the actuator is
moved to/removed from the actuating range.
The system consists of the following components: coded actuator (transponder) and switch.
Whether the device learns the complete actuator code (unicode) or not (multicode) depends on the respective version.
ÌDevices with unicode evaluation: The actuator must be assigned to the safety switch by a teach-in operation so that
it is detected by the system. This unambiguous assignment ensures a particularly high level of protection against tam-
pering. The system thus possesses a high coding level.
ÌDevices with multicode evaluation: Unlike systems with unique code detection, on multicode devices a specic code
is not requested 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 taught-in code in the safety switch
(unique code detection). The system possesses a low coding level.
When the guard is closed, the actuator is moved towards the safety switch. When the operating distance is reached, power
is supplied to the actuator by the switch and data are transferred.
If a permissible code is detected, the safety outputs are switched on.
The safety outputs are turned off when the guard is opened.
In the event of a fault in the safety switch, the safety outputs are switched off and the DIA LED illuminates red. The occurrence
of faults is detected at the latest on the next demand to close the safety outputs (e.g. on starting).
6.1. Door monitoring output
The door monitoring output is switched on as soon as a valid actuator is detected in the actuating range.
6.2. Diagnostic output
The diagnostic output is switched on in the event of a fault (switch-on condition as for DIA LED).
6.3. Limit-range monitoring
If the safety door with the actuator should settle over time, the actuator can drift out of the read head actuating range. The
device recognizes this situation and indicates that the actuator is in the limit range by ashing the STATE LED. This allows
the safety door to be readjusted in time. Also see chapter 10. System status table on page 22.
6.4. Switching states
The detailed switching states for your switch can be found in the system status table (see chapter 10. System status table
on page 22). All safety outputs, monitoring outputs and display LEDs are described there.
Guard closed
(actuator in the actuating range and permissible
code detected)
Guard open
(actuator not in the actuating range)
Safety outputs OA and OB on off
Monitoring output OUT on off

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
8(Translation of the original operating instructions) 2109309-09-03/20
7. Mounting
CAUTION
Safety switches must not be bypassed (bridging of contacts), turned away, removed or otherwise
rendered ineffective.
ÌObserve ENISO14119:2013, section 7, for information about reducing the possibilities for by-
passing an interlocking device.
NOTICE
Risk of damage to equipment and malfunctions as a result of incorrect installation.
ÌSafety switches and actuators must not be used as an end stop.
ÌObserve ENISO14119:2013, sections 5.2 and 5.3, for information about mounting the safety
switch and the actuator.
ÌFrom the assured release distance Sar, the safety outputs are safely shut down.
ÌWhen mounting several safety switches, observe the stipulated minimum distance to avoid mutual
interference.
min. 120 mm
ÌThe operating distances change during the mounting of the actuator as a function of the material
used for the guard.
Permissible approach directions
Note the following points:
ÌActuator and safety switch must be easily accessible for inspection and replacement.
ÌActuator and safety switch must be tted so that
- the front faces are at the minimum operating distance 0.8xSao or closer when the guard is closed (see chapter 11.
Technical data, sections Operating distances and Typical actuating range of the respective actuator). To avoid enter-
ing the area of possible side lobes, a minimum distance is to be maintained in case of a side approach direction. See
chapter 11. Technical data, section Typical actuating range for the related actuator.
- when the guard is open up to the distance Sar (assured release distance), a hazard is excluded.
- the actuator is positively mounted on the guard, e.g. by using the safety screws included.
- The safety screws cannot be removed or tampered with using simple means.
ÌPay attention to the maximum tightening torque for the read head or safety switch and actuator fastenings of 1Nm.

9
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
8. Electrical connection
The following connection options are available:
ÌSeparate operation
ÌSeries connection with Y-distributors or the passive distribution module AC-DP-…-SA-… from EUCHNER (only with M12
plug connector)
ÌSeries connection, e.g. with wiring in the control cabinet
ÌOperation on an AR evaluation unit.
WARNING
In the event of a fault, loss of the safety function due to incorrect connection.
ÌTo ensure safety, both safety outputs must always be evaluated.
ÌMonitoring outputs must not be used as safety outputs.
ÌLay the connecting cables with protection to prevent the risk of short circuits.
CAUTION
Risk of damage to equipment or malfunctions as a result of incorrect connection.
ÌDo not use a control system with pulsing or switch off the pulsing function in your control system.
The device generates its own test pulses on the safety outputs. A downstream control system
must tolerate these test pulses, which may have a length of up to 1ms.
The test pulses are also output when the safety outputs are switched off.
Depending on the inertia of the downstream device (control system, relay, etc.), this can lead to
short switching processes.
ÌThe inputs on a connected evaluation unit must be positive switching, as the two outputs on the
safety switch deliver a level of +24V in the switched-on state.
ÌAll the electrical connections must either be isolated from the mains supply by a safety transformer
according to IEC 61558-2-6 with limited output voltage in the event of a fault, or by other equivalent
isolation measures (PELV).
ÌAll electrical outputs must have an adequate protective circuit for inductive loads. The outputs
must be protected with a free-wheeling diode for this purpose. RC interference suppression units
must not be used.
ÌPower devices which are a powerful source of interference must be installed in a separate location
away from the input and output circuits for signal processing. The cable routing for safety circuits
should be as far away as possible from the cables of the power circuits.
ÌTo avoid EMC interference, the physical environmental and operating conditions at the in-
stallation site of the device must comply with the requirements according to the standard
EN60204-1:2006, section 4.4.2 (EMC).
ÌPay attention to any interference elds from devices such as frequency converters or induction
heating systems. Observe the EMC instructions in the manuals from the respective manufacturer.
Important!
If the device does not appear to function when operating voltage is applied (e.g. green STATE LED
does not ash), the safety switch must be returned unopened to the manufacturer.

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
10 (Translation of the original operating instructions) 2109309-09-03/20
8.1. Notes about
Important!
ÌThis device is intended to be used with a Class 2 power source in accordance with UL1310.
As an alternative an LV/C (Limited Voltage/Current) power source with the following properties can
be used:
- This device shall be used with a suitable isolating source in conjunction with a fuse in accordance
with UL248. The fuse shall be rated max. 3.3A and be installed in the max. 30VDC power supply
to the device in order to limit the available current to comply with the requirements. Please note
possibly lower connection ratings for your device (refer to the technical data).
ÌFor use and applications as per the requirements of 1), a connecting cable listed under the UL
category code CYJV2 or CYJV must be used.
1) Note on the scope of the UL approval: the devices have been tested as per the requirements of UL508 and CSA/ C22.2 no. 14 (protection against electric shock
and re).
8.2. Safety in case of faults
ÌThe operating voltage UBis reverse polarity protected.
ÌThe safety outputs are short circuit-proof.
ÌA short circuit between the safety outputs is detected by the switch.
ÌA short circuit in the cable can be excluded by laying the cable with protection.
8.3. Fuse protection for power supply
The power supply must be provided with fuse protection depending on the number of switches and the current required for
the outputs. The following rules apply:
Max. current consumption of an individual switch Imax
Imax = IUB + IOUT + IOA+OB
IUB = Switch operating current (50mA)
IOUT = Load current of monitoring outputs (max. 50mA)
IOA+OB = Load current of safety outputs OA + OB (2 x max. 200mA)
Max. current consumption of a switch chain ΣImax
ΣImax = IOA+OB + nx(IUB + IOUT)
n = Number of connected switches

11
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
8.4. Requirements for connecting cables
CAUTION
Risk of damage to equipment or malfunctions as a result of incorrect connecting cables.
ÌUse connection components and connecting cables from EUCHNER.
ÌOn the use of other connection components, the requirements in the following table apply.
EUCHNER provides no warranty for safe function in case of failure to comply with these require-
ments.
Observe the following requirements with respect to the connecting cables:
Parameter Value Unit
Conductor cross-section, min. 0.14 … 0.34 mm²
R max. 150 W/km
C max. 120 nF/km
L max. 0.65 mH/km
Recommended cable type LIYY 8 x 0.34mm²
8.5. Maximum cable lengths
Switch chains are permitted up to a maximum overall cable length of 200m taking into account the voltage drop as a result
of the cable resistance (see table below with example data and case example).
SPS
PLC
l1l2
lmax =200 m
ln
umin = 24 V -10% un= 24 V -20%
5 x 0,34 mm2 5 x 0,34 mm2/
5 x 0,14 mm2
5 x 0,34 mm2
CES-AR # n CES-AR # n-1 CES-AR # 1
iout
STATE
DIA
STATE
DIA
STATE
DIA
n
Max. number of switches
IOUT (mA)
Possible output current per channel OA/OB
l1(m)
Max. cable length from the last switch to the
control system
0.14 mm² 0.34 mm²
5
10 70 140
25 50 110
50 35 80
100 25 50
200 13 25
6
10 60 120
25 50 90
50 35 70
100 20 50
200 13 25
10
10 35 70
25 30 60
50 25 50
100 15 35
200 10 20

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
12 (Translation of the original operating instructions) 2109309-09-03/20
8.5.1. Determining cable lengths using the example table
Example: 6 switches are to be used in series. Cabling with a length of 40m is routed from a safety relay in the control
cabinet to the last switch (#6). Cables with a length of 20m each are connected between the individual safety switches.
CES-AR # 6
Sicherheits-
relais
Safety Relay
CES-AR # 5 CES-AR # 4 CES-AR # 3 CES-AR # 2 CES-AR # 1
STATE
DIA
STATE
DIA
STATE
DIA
STATE
DIA
STATE
DIA
STATE
DIA
l1 = 40 m l2 = 5 x 20 m
lmax = 140 m
ln = 20 m
un= min. 19,2 V
iout = min. 75 mA
Figure 1: Circuit example with six CES-AR
A safety relay is connected downstream that consumes 75mA at each of the two safety inputs. It operates over the whole
temperature range with a voltage of 19.2V (corresponds to 24V - 20%).
All the relevant values can now be determined using the example table:
1. Select the corresponding section in the column n (max. number of switches). In this case: 6 switches.
2. In column IOUT (possible output current per channel OA/OB), nd a current greater than or equal to 75mA. In this case:
100mA.
¨It is then possible to determine the maximum cable length from the last switch (#6) to the control system from column
l1. In this case, a length of 50m is permitted.
Result: The desired cable length l1of 40m is below the permitted value from the table. The overall length of the switch
chain lmax of 140m is less than the maximum value of 200m.
¨The planned application is therefore functional in this form.

13
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
8.6. Connector assignment of safety switch CES-AR
1
7
6
5
4
3
2
8
8
2
7
6
1
3
4
5
UB
0V
IA
IB
OA
OB
OUT
RST
Coding lug
View of connection side on the safety switch
Figure 2: Connector assignment of safety switch CES-AR
Pin Designation Description Conductor coloring
1 IB Enable input for channel 2 WH
2 UB Power supply, DC 24 V BN
3 OA Safety output, channel 1 GN
4 OB Safety output, channel 2 YE
5OUT Monitoring output GY
6 IA Enable input for channel 1 PK
7 0V Ground, DC 0 V BU
8 RST Reset input RD

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
14 (Translation of the original operating instructions) 2109309-09-03/20
8.7. Connector assignment of Y-distributor
M12x1
max. 45
Ø 14,5
Strapping plug 097645
4-pin, plug
(gure similar)
Y-distributor with connecting
cable 111696 or 112395
Socket
Pin Socket
Pin Function
X2.1 UB
X2.2 OA
X2.3 0V
X2.4 OB
X2.5 RST
Pin Function
X3.1 UB
X3.2 IA
X3.3 0V
X3.4 IB
X3.5 RST
12
12
097627
45°
15,1
485
6
312
7
35,1
20,5
1
2
4
5
33
4
2
1
5
Mx1
Ø 14,6
Mx1
( )
Y-distributor
097627
Socket
Connector assignment of safety
switch CES-AR (8-pin plug) and
Y-distributor (8-pin socket)
Pin Function
X1.1 IB
X1.2 UB
X1.3 OA
X1.4 OB
X1.5 OUT
X1.6 IA
X1.7 0V
X1.8 RST
Pin Socket
M 12 x1
44
45 41
15
M 12 x1
15 15
M 12 x1
33
A
B
4
8
5
6
3
1
2
7
1
2
4
5
33
4
2
1
5
Length l
Order no. Length
l [mm]
111696 200
112395 1,000
Pin Function
X2.1 UB
X2.2 OA
X2.3 0V
X2.4 OB
X2.5 RST
Pin Function
X3.1 UB
X3.2 IA
X3.3 0V
X3.4 IB
X3.5 RST

15
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
8.8. Connection of a single AR device
If a single AR device is used, connect the device as shown in Figure 3. Monitoring outputs can be routed to a control system.
The switch can be reset via the RST input. To do this, a voltage of 24 V is applied to the RST input for at least 3 seconds.
The RST input must be connected to 0 V if it is not used.
WARNING
In the event of a fault, loss of the safety function due to incorrect connection.
ÌTo ensure safety, both safety outputs (OA and OB) must always be evaluated.
Important!
The example shows only an excerpt that is relevant for the connection of the CES system. The example
illustrated here does not show complete system planning. The user is responsible for safe integration
into the overall system. Detailed application examples can be found at www.euchner.com. Simply enter
the order number of your switch in the search box. You will nd all available connection examples for
the device in Downloads.
Safety
Outputs
Monitoring
Output
Read Head
-B1 UB
2
IA
6
IB
1
7
0V
5
OUT
3
OA
4
OB
RST
8
CES
Safety Inputs
24 V DC
GND
-F1
Connected
load
-S1
Figure 3: Connection example for separate operation of a CES-AR-…

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
16 (Translation of the original operating instructions) 2109309-09-03/20
8.9. Connection of several devices in a switch chain
Important!
ÌAn AR switch chain may contain a maximum of 20 safety switches.
ÌThe example shows only an excerpt that is relevant for the connection of the CES system.
The example illustrated here does not show complete system planning. The user is responsi-
ble for safe integration into the overall system. Detailed application examples can be found at
www.euchner.com. Simply enter the order number of your switch in the search box. You will nd all
available connection examples for the device in Downloads.
The series connection is shown here based on the example of the version with plug connector M12. The switches are con-
nected one behind the other with the aid of pre-assembled connecting cables and Y-distributors. If a safety door is opened or
if a fault occurs on one of the switches, the system shuts down the machine. A higher-level control system cannot, however,
detect which safety door is open or on which switch a fault has occurred with this connection technology. A special AR eval-
uation unit is required for this purpose (see chapter 8.10. Information on operation on an AR evaluation unit on page 18).
The series connection can also be realized via additional terminals in a control cabinet.
The safety outputs are permanently assigned to the respective safety inputs of the downstream switch. OA must be connected
to IA and OB to IB. If the connections are interchanged (e.g. OA to IB), the device will switch to fault state.
Always use the RST input in series connections. All switches in a chain can be reset at the same time with this reset input.
To do this, a voltage of 24 V must be applied to the RST input for at least 3 seconds. If the RST input is not used in your
application, it should be connected to 0 V.
Note the following on this aspect:
ÌA common signal must be used for all switches in the chain. This can be a changeover switch or the output of a control
system. A pushbutton is not suitable because the reset must always be connected to GND during operation (see switch
S1 in Figure 4 on page 17).
ÌReset must always be performed simultaneously for all switches of the chain.

17
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
Y-distributor
Terminating plug
1 3 5 2 4
1 6 2 78 5 3 4
5 2 4 1 3
RST
0V
IA
OUT
OB
OA
UB
IB
UB OA 0V OB
RST
UB
IA 0V IB
RST
2 4 1UB
IA IB
Safety Outputs
Read Head
Read Head
Safety Outputs
SafetyInputsSafety Inputs
Y-distributor Y-distributor Y-distributor
Terminating plug
Eval Unit
Read Head
Safety Outputs
Safety Inputs
5
OUT
4
OB
2
UB
8
RST
6
IA
1
IB
7
0V
5
OUT
3
OA
4
OB
2
UB
8
RST
6
IA
1
IB
7
0V
0V
3
OA
4
OB
-S1
12
11 14
2
UB
8
RST
6
IA
1
IB
7
0V
5
OUT
3
OA
24
V
CES CESCES
Figure 4: Connection example for series connection with reset and changeover switch

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
18 (Translation of the original operating instructions) 2109309-09-03/20
8.10. Information on operation on an AR evaluation unit
Devices with version number V1.1.2 or higher can be operated on an AR evaluation unit. Refer to the operating instructions
for the relevant AR evaluation unit for more information.
8.11. Notes on operation with safe control systems
Please observe the following requirements for connection to safe control systems:
ÌUse a common power supply for the control system and the connected safety switches.
ÌA pulsed power supply must not be used for UB. Tap the supply voltage directly from the power supply unit. If the power
supply is connected to a terminal of a safe control system, this output must provide sufcient electrical current.
ÌAlways connect inputs IA and IB directly to a power supply unit or to outputs OA and OB of another EUCHNER AR device
(series connection). Pulsed signals must not be present at inputs IA and IB.
ÌThe safety outputs (OA and OB) can be connected to the safe inputs of a control system. Prerequisite: The input must
be suitable for pulsed safety signals (OSSD signals, e.g. from light grids). The control system must tolerate test pulses
on the input signals. This normally can be set up by parameter assignment in the control system. Observe the notes of
the control system manufacturer. For the pulse duration of your safety switch, refer to chapter 11. Technical data on
page 23.
A detailed example of connecting and setting the parameters of the control system is available for many devices at
www.euchner.com, in the area Downloads/Applications/CES. The features of the respective device are dealt with there in
greater detail.

19
2109309-09-03/20 (Translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
EN
Safety Output
Read Head
Safety Inputs
Read Head
Safety Output
SafetyInputsSafetyInputsSafety Output
Y-distributor Y-distributor Y-distributor
Terminating plug
ET200
4/8 F-DI4 F-DO
-X1-X1
Digital Output
PWR Supply of the control
DI4 DI0DO..M DO..P DO
2
DC24V
3
M
2
UB
8
RST
6
IA
1
IB
X2:3
LED1
X2:4
UCM
X2:5
J
7
0V
5
OUT
3
OA
4
OB
X2:1
0V(UCM)
2
UB
8
RST
6
IA
1
IB
7
0V
5
OUT
3
OA
4
OB
2
UB
8
RST
6
IA
1
IB
7
0V
5
OUT
3
OA
4
OB
24
V
0V
CES CET
CES
Figure 5: Connection example for mixed series connection (2 x CES and 1 x CET) to ET200

Operating Instructions
Non-Contact Safety Switch CES-AR-C.2-…
20 (Translation of the original operating instructions) 2109309-09-03/20
9. Setup
9.1. LED displays
You will nd a detailed description of the signal functions in chapter 10. System status table on page 22.
LED Color
STATE green
DIA red
9.2. Teach-in function for actuator (only for unicode evaluation)
The actuator must be allocated to the safety switch using a teach-in function before the system forms a functional unit.
During a teach-in operation, the safety outputs and the monitoring output OUT are switched off, i.e. the system is in the
safe state.
Tip!
It is recommended to perform the teach-in operation prior to mounting. Mark switches and actuators
that belong together in order to avoid confusion. For devices to be connected in series, we recommend
performing the teach-in operation separately for each device prior to series connection.
Important!
ÌThe teach-in operation may be performed only if the device functions awlessly. The red DIA LED
must not be illuminated.
ÌThe safety switch disables the code of the preceding device if teach-in is carried out for a new
actuator. Teach-in is not possible again immediately for this device if a new teach-in operation is
carried out. The disabled code is released again in the safety switch only after a third code has
been taught-in.
ÌThe safety switch can be operated only with the last actuator taught-in.
ÌThe number of teach-in operations is unlimited.
ÌAfter starting, the device remains in teach-in standby state for 3min. If no new actuator is detect-
ed in this time, the device changes to normal operation. If the switch detects the actuator that was
most recently taught-in when in the teach-in standby state, this state is ended immediately and the
switch changes to normal operation.
ÌIf the actuator to be taught-in is within the actuating range for less than 60s, it will not be activat-
ed and the most recently taught-in actuator will remain saved.
ÌAfter an unsuccessful teach-in operation, the switch changes to normal operation.
9.2.1. Preparing device for the teach-in operation and teaching-in actuator
1. Apply operating voltage to the safety switch.
¨The green LED ashes quickly (approx. 10 Hz).
A self-test is performed during this time (approx. 10 s). After this, the LED ashes cyclically three times and signals
that it is in standby state for teach-in.
Standby state for teach-in remains active for approx. 3 minutes.
2. Move new actuator to the read head (observe distance < Sao).
¨Teach-in operation starts, green LED ashes (approx. 1 Hz). During the teach-in operation, the safety switch checks
whether the actuator is a disabled actuator. Provided this is not the case, the teach-in operation is completed after
approx. 60 seconds, and the green LED goes out. The new code has now been stored, and the old code is disabled.
3. To activate the new actuator code from the teach-in operation in the safety switch, the operating voltage to the safety
switch must then be switched off for min. 3 seconds.
STATE DIA