EUCHNER CES-I-BR-FLX-C07 Series User manual

EN
Operating Instructions
Non-Contact Safety Switch
CES-I-BR-..-FLX-C07-…

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
2(translation of the original operating instructions) MAN20001604-01-12/22
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 ................................................................................... 7
6. Function............................................................................................................... 8
6.1. Limit-range monitoring ...................................................................................................................8
6.2. Door position monitoring output OD .................................................................................................8
6.3. Communication connection C ..........................................................................................................8
6.4. Switching states .............................................................................................................................9
7. Mounting............................................................................................................ 10
8. Electrical connection .......................................................................................... 11
8.1. Notes about .........................................................................................................................12
8.2. Safety in case of faults..................................................................................................................12
8.3. Fuse protection for power supply...................................................................................................12
8.4. Requirements for connecting cables...............................................................................................13
8.5. Connector assignment of safety switch CES-I-BR-..-FLX-C07-… .........................................................13
8.6. Notes on operation with safe control systems.................................................................................13
8.7. Connection without and with IO-Link communication ........................................................................14
8.7.1. Connection without IO-Link communication .......................................................................14
8.7.2. Connection with IO-Link communication............................................................................14
9. Connection of a single CES-I-BR-..-FLX-C07-… (separate operation)..................... 15
10. Connection of several devices in a chain (series connection)................................ 16
10.1. Series connection with wiring in the control cabinet.........................................................................16
10.2. Series connection with Y-distributors .............................................................................................17
10.2.1. Maximum cable lengths ..................................................................................................17
10.2.2. Determining cable lengths using the example table...........................................................18
10.2.3. Connector assignment of Y-distributor for series connection without IO-Link communication....19
10.2.4. Connector assignment of Y-distributor for series connection with IO-Link communication ........21

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MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
EN
11. Using communication data.................................................................................. 23
11.1. Connection to a BR/IO-Link Gateway GWY-CB..................................................................................23
11.2. Connection to a safety relay ESM-CB..............................................................................................23
11.3. Overview of the communication data ..............................................................................................23
11.3.1. Cyclical data (process data)............................................................................................23
11.3.2. Acyclical data (device data and events)............................................................................24
12. Setup ................................................................................................................. 25
12.1. Actuator teach-in ..........................................................................................................................25
12.2. Electrical function test...................................................................................................................26
13. Factory reset...................................................................................................... 26
14. Status and error messages ................................................................................. 27
14.1. LED indicator................................................................................................................................27
14.2. Status messages..........................................................................................................................27
14.3. Error messages............................................................................................................................28
14.4. Acknowledging error messages.....................................................................................................29
15. Technical data .................................................................................................... 30
15.1. Technical data for safety switch CES-I-BR-..-FLX-C07-… ....................................................................30
15.1.1. Radio frequency approvals..............................................................................................31
15.1.2. Typical system times......................................................................................................32
15.1.3. Dimension drawing for safety switch CES-I-BR-..-FLX-C07-…...............................................32
15.2. Technical data for actuator CES-A-BTN-C07-… ................................................................................33
15.2.1. Dimension drawing.........................................................................................................33
15.2.2. Actuating ranges and installation positions .......................................................................34
16. Ordering information and accessories................................................................. 36
17. Inspection and service ........................................................................................ 36
18. Service .............................................................................................................. 36
19. Declaration of conformity ................................................................................... 36

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
4(translation of the original operating instructions) MAN20001604-01-12/22
1. About this document
1.1. Scope
These operating instructions apply to all CES-I-BR-..-FLX-C07-… of version 1.0.X. These operating instructions, the document
Safety information and any available 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
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
(MAN20001604) (this document) www
Declaration of conformity Declaration of conformity www
Possibly available data
sheet Item-specic information about deviations or additions
www
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. or
the order number for the device in the search box.

5
MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
EN
2. Correct use
Safety switches series CES-I-BR-..-FLX-C07-… are transponder-coded switches for safe position sensing. Depending on the
taught-in function actuator, the evaluation of the actuator has a high or low coding level. In combination with the actuators
A-FLX-C07-04-V.., the system possesses a high coding level.
In combination with moving machine components and the machine control, this safety component prevents dangerous
machine functions from occurring before the safe position is reached.
This means:
ÌStarting commands that cause a dangerous machine function must become active only when the moving machine com-
ponent is in the safe position.
ÌA stop command is triggered when the safe position is left.
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 a BR switch chain is permitted only using devices intended for series connection in a BR
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-I-BR-..-FLX-C07-… components
Safety switch
Actuator
A-FLX-C07-04-V02-165928
A-FLX-C07-04-V03-166488
CES-I-BR-..-FLX-C07-…
Key to symbols Combination possible

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
6(translation of the original operating instructions) MAN20001604-01-12/22
3. Description of the safety function
Devices from series CES-I-BR-..-FLX-C07-... feature the following safety function:
Safe position monitoring for moving machine components
ÌSafety function:
- When the moving machine components are in the safe position, the safety outputs are switched on (see chapter 6.4.
Switching states on page 9).
ÌSafety characteristics: category, Performance Level, PFHD(see chapter 15. Technical data on page 30).
NOTICE
You can regard the complete BR device chain as one subsystem during calculation. The following
calculation method applies to the PFHDvalue:
#1
PFHd,1 PFHd,ext
BR-Device #1 ... n External Evaluation
(e.g. PLC)
PFHdges =∑ PFHd,k + PFHd,ext
n
k=1
#2
PFHd,2
#n
PFHd,n
Alternatively, the simplied method according to section 6.3 of EN 13849-1:2015can be used for
calculation.
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.

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MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
EN
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 machine 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 machine should be checked at suitable intervals as part of the main-
tenance 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 ineffective.
On this topic pay attention in particular to the measures for reducing the possibility of bypassing
according to ENISO14119:2013, section 7.
ÌThe switching operation must be triggered only by actuators designated for this purpose.
ÌThe safety function is ensured only if unused actuators cannot be misused to tamper with the ma-
chine function. The user must therefore take appropriate organizational measures, such as rendering
unneeded actuators in a packaging unit unusable.
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. You can download the operating
instructions from www.euchner.com.

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
8(translation of the original operating instructions) MAN20001604-01-12/22
6. Function
The safety switch monitors one or more positions of moving machine components. The safety outputs are switched on/off
when the actuator is moved into/out of the actuating range.
The system consists of the following components: coded actuator (transponder) and switch.
The moving machine component with the actuator is moved to the safety switch in the safe position. When the operating
distances are reached, power is supplied to the actuator by the switch and data are transferred.
When a permissible code is detected, the safety outputs FO1A and FO1B are switched on.
When the moving machine component with the actuator moves away, the safety outputs are switched off.
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).
The switch and the actuators A-FLX-C07-04-V.. designated for it form a highly coded system. The actuators of a packaging
unit must be assigned to the safety switch by a teach-in operation so that they are detected by the system. This unambiguous
assignment ensures a particularly high level of protection against tampering.
The coding is identical for all the actuators in a packaging unit. Actuators from different packaging units are coded differently.
Actuators belonging to a packaging unit cannot be reordered individually. They are available only as a packaging unit.
6.1. Limit-range monitoring
The device detects if the actuator drifts out of the actuating range of the switch over time. The STATE LED or the limit-range
signal OW indicates that the actuator is in the limit range (see chapter 14.2. Status messages on page 27). Readjusting
the moving machine component can prevent the actuator from drifting farther out of the actuating range.
6.2. Door position monitoring output OD
The device features a monitoring output for the door position signal OD. Depending on the application, the signal is available
at the monitoring output or as a status bit. The status bit is evaluated via the BR/IO-Link Gateway. If no BR/IO-Link Gateway
is connected, this output behaves like a monitoring output.
The door position signal OD is present when a valid actuator is detected in the actuating range and the moving machine
component is in the safe position.
6.3. Communication connection C
When the device is connected to a BR/IO-Link Gateway, the monitoring output functions as a communication connection. The
switch delivers cyclical and acyclical data. You will nd an overview of the communication data in chapter 11.3. Overview
of the communication data on page 23.

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MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
EN
6.4. Switching states
The detailed switching states for your switch can be found in the chapter 14. Status and error messages on page 27.
All safety outputs, signals and display LEDs are described there.
Safe position reached
(actuator in the actuating range and permissible
code detected)
Safe position left
(actuator not in the actuating range)
Safety outputs FO1A and FO1B on off
Door position signal OD on off

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
10 (translation of the original operating instructions) MAN20001604-01-12/22
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 bypassing
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. 50 mm
ÌThe operating distances change during the mounting of the actuator as a function of the material
used for the moving machine component.
ÌObserve direction of arrow on the device (see gure below).
Permissible installation positions
BA
C
D
z
x
y
x
z
y
BA
CD
z
x
y
x
z
y
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
- a minimum distance is maintained with a side approach direction to avoid entering the area of possible side lobes. See
chapter 15. Technical data, section Typical actuating range for the related actuator.
- when the safe position is left up to the distance Sar (assured release distance), a hazard is excluded.
- the actuator is positively mounted on the moving machine component, e.g. by using the safety screws included.
- they cannot be removed or tampered with using simple means.
ÌPay attention to the maximum tightening torque for the safety switch and actuator mountings of 0.8 Nm.
ÌSeal the mounting holes after mounting using the caps provided to prevent the accumulation of dirt.
ÌIn order to prevent damage, the connecting cable must be laid with protection in areas in which high-pressure cleaners
are used.

11
MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
EN
8. Electrical connection
The following connection options are available:
ÌSeparate operation
ÌSeries connection with wiring in the control cabinet
ÌSeries connection with Y-distributors
ÌConnection without IO-Link communication
ÌConnection with IO-Link communication
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 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 300µs. Depending on the inertia of the
downstream device (control system, relay, etc.), this can lead to short switching processes.
The test pulses are output only with the safety outputs switched off during device start.
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
insulation 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 installation
site of the device must comply with the requirements according to the standard EN60204-1 (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-I-BR-..-FLX-C07-…
12 (translation of the original operating instructions) MAN20001604-01-12/22
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 UL requirements. Please note
possibly lower connection ratings for your device (refer to the technical data).
ÌFor use and application 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). Only for applications as per NFPA79 (Industrial Machinery).
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 on starting or when the safety outputs are activated by the device.
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 + IOD + IFO1A+FO1B
IUB = Switch operating current (40mA)
IOD = Load current of monitoring output (max. 50mA)
IFO1A+FO1B = Load current of safety outputs FO1A + FO1B (2xmax. 150mA)
Max. current consumption of a switch chain ΣImax
ΣImax = IFO1A+FO1B + nx(IUB + IOD)
n = Number of connected switches

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MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
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 requirements.
Observe the following requirements with respect to the connecting cables:
Parameter Value Unit
M12 / 8-pin M12 / 5-pin
Recommended cable type LIYY8x0.25 LIYY5x0.25 LIYY5x0.34 mm²
Cable 8x0.25 5x0.25 5x0.34 mm²
Cable resistance R max. 78 78 58 W/km
Inductance L max. 0.51 0.64 0.53 mH/km
Capacitance C max. 107 60 100 nF/km
8.5. Connector assignment of safety switch CES-I-BR-..-FLX-C07-…
Plug connector
(view of connection side) Pin Designation Function
Conductor color-
ing of connecting
cable 1)
21
4
38
56
7
1 FI1B Enable input, channelB WH
2 UB Operating voltage, 24VDC BN
3 FO1A Safety output, channelA GN
4 FO1B Safety output, channelB YE
5 OD/C Monitoring output/communication GY
6 FI1A Enable input, channelA PK
7 0 V Ground 0VDC BU
8 - n.c. RD
1) Only for standard EUCHNERconnecting cable
8.6. Notes on operation with safe control systems
Observe the following guidelines 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 FI1A and FI1B directly to a power supply unit or to outputs FO1A and FO1B of another EUCHNER
BR device (series connection). Pulsed signals must not be present at inputs FI1A and FI1B.
ÌThe safety outputs FO1A and FO1B 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 test pulse duration of your safety switch, refer to chapter 15. Technical data on page 30.
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.

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
14 (translation of the original operating instructions) MAN20001604-01-12/22
8.7. Connection without and with IO-Link communication
8.7.1. Connection without IO-Link communication
Only the safety and monitoring outputs are switched with this connection method.
With a series connection, the safety signals are looped through from device to device.
8.7.2. Connection with IO-Link communication
If, in addition to the safety function, detailed monitoring and diagnostic data are to be processed, a BR/IO-Link Gateway
is required. To poll the communication data from the connected device, communication connection C is routed to the BR/
IO-Link Gateway.
You will nd further information in the operating instructions for your BR/IO-Link Gateway.

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MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
EN
9. Connection of a single CES-I-BR-..-FLX-C07-… (separate operation)
If a single CES-I-BR-..-FLX-C07-… is used, connect the device as shown in Fig. 1. The monitoring output OD can be connected
to a control system.
WARNING
In the event of a fault, loss of the safety function due to incorrect connection.
ÌTo ensure safety, both safety outputs FO1A and FO1B 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.
Connected load
Safety
Outputs
Monitoring
Output
Read Head
Safety Inputs
UB
2
FI1A
6
FI1B
1
0V
7
OD/C
5
FO1A
3
FO1B
4
n.c.
8
1
2
-F1
24V DC
0 V
24V DC
0 V
Fig. 1: Connection example for separate operation of a CES-I-BR-..-FLX-C07-…

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
16 (translation of the original operating instructions) MAN20001604-01-12/22
10. Connection of several devices in a chain (series connection)
WARNING
In the event of a fault, loss of the safety function due to incorrect connection.
ÌTo ensure safety, both safety outputs FO1A and FO1B must always be evaluated.
Important!
ÌA BR chain may contain a maximum of 20 safety switches.
ÌThe following connection examples show only excerpts that are relevant for the connection of the
CES system. They do not represent complete system planning. The user is responsible for safe in-
tegration 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.
ÌWhen using Y-distributors, make sure to use the correct Y-distributor version. See chapters 10.2.3.
Connector assignment of Y-distributor for series connection without IO-Link communication on page
19 and 10.2.4. Connector assignment of Y-distributor for series connection with IO-Link commu-
nication on page 21.
10.1. Series connection with wiring in the control cabinet
The series connection can be realized via additional terminals in a control cabinet.
Important!
In case of series connection with IO-Link communication:
ÌThe safety outputs are permanently assigned to the respective safety inputs of the downstream
switch. FO1A must be routed to FI1A and FO1B to FI1B.
ÌIf the connections are interchanged (e.g. FO1A to FI1B), the downstream device will enter the fault state.

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MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
EN
10.2. Series connection with Y-distributors
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 the safe position is left
or if a fault occurs on one of the switches, the system shuts down the machine.
10.2.1. Maximum cable lengths
Important!
The maximum number of devices in a BR switch chain depends on many factors, including the cable
length. This case example shows a standard application. You will nd further connection examples at
www.euchner.com.
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). The cable length between two switches is
limited to 100m.
SPS
PLC
l1l2
l
max
=200 m
ln
umin = 24 V
5 x 0,34 mm2 5 x 0,34 mm25 x 0,34 mm2
CES-I-BR # n CES-I-BR # n-1 CES-I-BR # 1
iout
n
Max. number of devices depending on the cable
length
IFO1A/IFO1B (mA)
Possible output current per channel FO1A/FO1B
l1(m)
Max. cable length from the last switch to the
control system
0.34 mm²
5
10 100
25 100
50 80
100 50
200 25
6
10 100
25 90
50 70
100 50
200 25
10
10 70
25 60
50 50
100 35
200 20

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
18 (translation of the original operating instructions) MAN20001604-01-12/22
10.2.2. 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-I-BR # 6
Sicherheits-
relais
Safety Relay
CES-I-BR # 5 CES-I-BR # 4 CES-I-BR # 3 CES-I-BR # 2 CES-I-BR # 1
l1 = 40 m l2 = 5 x 20 m
l
max
= 140 m
ln = 20 m
iout = min. 75 mA
Fig. 2: Circuit example with six CES-I-BR
A safety relay is connected downstream that consumes 75mA at each of the two safety inputs.
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 IFO1A/IFO1B (possible output current per channel FO1A/FO1B), 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.

19
MAN20001604-01-12/22 (translation of the original operating instructions)
Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
EN
10.2.3. Connector assignment of Y-distributor for series connection without IO-Link communication
Important!
ÌThe switch chain must always be terminated with strapping plug 097645.
ÌA higher-level control system cannot detect where the safe position was left or on which switch a fault has
occurred with this connection technology.
Plug connector X1 Y-distributor Plug connector X2 / X3
X1
Pin Function
X1.1 FI1B
X1.2 UB
X1.3 FO1A
X1.4 FO1B
X1.5 n.c.
X1.6 FI1A
X1.7 0 V
X1.8 *
X1
Socket
6
5
8
4
3
2
7
1
097627
X1
X2
X3
X2
Plug
1
1
5
5
4
4
3
3
2
2
X3
Socket
X2
Pin Function
X2.1 UB
X2.2 FO1A
X2.3 0 V
X2.4 FO1B
X2.5 *
X3
Pin Function
X3.1 UB
X3.2 FI1A
X3.3 0 V
X3.4 FI1B
X3.5 *
X1
Socket
5
8
4
3
6
7
1
2
111696
112395
X1
X2
X3
With connecting cable
X2
Plug
5
1
43
2
5
1
4
3
2
X3
Socket
* Function and compatibility are dependent on the connector assignment of the device connected.

Operating Instructions
Non-Contact Safety Switch CES-I-BR-..-FLX-C07-…
20 (translation of the original operating instructions) MAN20001604-01-12/22
Y-distributor Y-distributor Y-distributor
Connected load
Bridging plug
Safety
Outputs
Monitoring
Output
Read Head
Safety Inputs
UB
2
FI1A
6
FI1B
1
0V
7
OD/C
5
FO1A
3
FO1B
4
n.c.
8
Safety
Outputs
Monitoring
Output
Read Head
Safety Inputs
UB
2
FI1A
6
FI1B
1
0V
7
OD/C
5
FO1A
3
FO1B
4
n.c.
8
Safety
Outputs
Monitoring
Output
Read Head
Safety Inputs
UB
2
FI1A
6
FI1B
1
0V
7
OD/C
5
FO1A
3
FO1B
4
n.c.
8
1:FI1B 6:FI1A 8:- 7:0V UB 2:UB 3.FIOA 4:FO1B 5:NC
1:UB 3:0V UB 5:- 2:FI1A 4:FI1B
1:UB
3:0V UB
5:-
2:FO1A
4:FO1B
1 2
-F1
1 2 4
1:UB 3:0V UB 5:- 2:FI1A 4:FI1B
1:UB
3:0V UB
2:FO1A
5:-
4:FO1B
1:UB
3:0V UB
2:FO1A
5:-
4:FO1B
1:UB 3:0V UB 5:- 2:FI1A 4:FI1B
1:FI1B 6:FI1A 7:0V UB 2:UB 3.FIOA 4:FO1B8:- 5:NC 1:FI1B 6:FI1A 7:0V UB 2:UB 3.FIOA 4:FO1B8:- 5:NC
24V DC
0 V
24V DC
0 V
Fig. 3: Connection example for series connection without IO-Link communication