EUCHNER CTS-C2-BP/BR-FLX User manual

EN
Operating Instructions
Transponder-Coded Safety Switch with Guard Locking for Process Protection
CTS-C2-BP/BR-FLX High/Low Coding Level

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
2(translation of the original operating instructions) MAN20001531-02-02/23
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 .......................................................................... 7
4. Exclusion of liability and warranty ......................................................................... 8
5. General safety precautions ................................................................................... 8
6. Function............................................................................................................... 9
6.1. Monitoring of the guard locking for process protection ......................................................................9
6.2. Monitoring outputs/status bits .........................................................................................................9
6.2.1. Guard locking signal OL ...................................................................................................9
6.2.2. Door position1 signal OD.................................................................................................9
6.2.3. Door position2 signal OT .................................................................................................9
6.2.4. Diagnostic signal OI .......................................................................................................10
6.2.5. Escape release signal OER ............................................................................................10
6.2.6. Status signal OM............................................................................................................10
6.2.7. Locking element signal OLS............................................................................................10
6.2.8. Communication connection C..........................................................................................10
6.3. Guard locking for process protection..............................................................................................10
6.4. Switching states ...........................................................................................................................11
7. Manual release................................................................................................... 12
7.1. Auxiliary release............................................................................................................................12
7.1.1. Actuating auxiliary release ..............................................................................................12
7.2. Escape release.............................................................................................................................13
7.2.1. Actuating escape release ...............................................................................................13
8. Mounting............................................................................................................ 14
9. Electrical connection .......................................................................................... 17
9.1. Notes about .........................................................................................................................18
9.2. Safety in case of faults..................................................................................................................18
9.3. Fuse protection for power supply...................................................................................................18
9.4. Requirements for connecting cables...............................................................................................19
9.5. Connector assignment of safety switches CTS-...-VAB-... with plug connectors 2 x M12......................19
9.6. Connector assignment of safety switches CTS-…-VSA-… with plug connector M12, 8-pin ...................... 20
9.7. Notes on operation with safe control systems.................................................................................21
9.8. Connection without and with IO-Link communication.........................................................................21
9.8.1. Connection without IO-Link communication .......................................................................21
9.8.2. Connection with IO-Link communication............................................................................21

3
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
10. Connection of a single CTS-C2-BP/BR-FLX (separate operation) .......................... 22
11. Connection of several devices in a chain (series connection)................................ 23
11.1. Series connection with wiring in the control cabinet.........................................................................23
11.2. Series connection with Y-distributors ..............................................................................................23
11.2.1. Maximum cable lengths with BR switch chains..................................................................24
11.2.2. Determining cable lengths using the example table...........................................................24
11.2.3. Connector assignment of Y-distributor for series connection without IO-Link communication....25
11.2.4. Connector assignment of Y-distributor for series connection with IO-Link communication .....27
12. Using communication data.................................................................................. 28
12.1. Connection to a BR/IO-Link Gateway GWY-CB..................................................................................28
12.2. Connection to a safety relay ESM-CB..............................................................................................28
12.3. Overview of the communication data ..............................................................................................29
12.3.1. Cyclical data (process data)............................................................................................29
12.3.2. Acyclical data (device data and events)............................................................................29
13. Setup ................................................................................................................. 31
13.1. Conguring device and teaching-in actuator for the rst time............................................................31
13.2. Teaching-in new actuator (only for evaluation of the actuator with a high coding level).........................32
13.3. Functional check...........................................................................................................................33
13.3.1. Mechanical function test .................................................................................................33
13.3.2. Electrical function test....................................................................................................33
14. Factory reset...................................................................................................... 34
15. Status and error messages ................................................................................. 34
15.1. LED displays ................................................................................................................................34
15.2. Status messages..........................................................................................................................35
15.3. Error messages............................................................................................................................36
15.4. Acknowledging error messages.....................................................................................................37
16. Technical data .................................................................................................... 38
16.1. Technical data for safety switch CTS-C2-BP/BR-FLX.........................................................................38
16.1.1. Typical system times......................................................................................................40
16.2. Radio frequency approvals.............................................................................................................41
16.3. Dimension drawing for safety switch CTS .......................................................................................42
16.4. Technical data for actuator A-FLX-D-0.-… ........................................................................................43
16.4.1. Dimension drawing for actuatorA-FLX-D-0.-…....................................................................43
17. Ordering information and accessories................................................................. 44
18. Inspection and service ........................................................................................ 44
19. Service .............................................................................................................. 44
20. Declaration of conformity ................................................................................... 44

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
4(translation of the original operating instructions) MAN20001531-02-02/23
1. About this document
1.1. Scope
These operating instructions apply to all CTS-C2-BP/BR-FLX… of version V2.0.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
Monitoring the position of the guard locking and active monitoring of the guard locking for process protection, high coding level
Monitoring the position of the guard locking and active monitoring of the guard locking for process protection, low coding level
Monitoring the position of the guard locking and optional monitoring of the guard locking for process protection, high coding level
Monitoring the position of the guard locking and optional monitoring of the guard locking for process protection, low coding level
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
(MAN20001531) (this document)
Internet
www
Declaration of conformity Declaration of conformity
Internet
www
Possibly available data
sheet Item-specic information about deviations or additions
Internet
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. in the search box.

5
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
2. Correct use
Safety switches series CTS-C2-BP/BR-FLX are interlocking devices with guard locking solenoid (type4) for process protection
without safe guard locking monitoring. The device complies with the requirements according to EN60947-5-3.
The device can be congured with the aid of a function actuator. Depending on the function actuator taught-in, the monitoring
of the guard locking for process protection is permanently active or available as an additional option and the evaluation of
the actuator code has a high or low coding level.
Table 1: System components
Safety switch
Function actuator
Monitoring of the guard locking for process protection
Active Optional Active Optional
High coding level High coding level Low coding level Low coding level
CTS-C2-BP/BR-FLX… A-FLX-D-0C-167919 A-FLX-D-0D-169044 A-FLX-D-0E-169045 A-FLX-D-0F-169046
If monitoring of the guard locking for process protection is active, the following applies:
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 or the guard locking is unlocked.
This means:
ÌStarting commands that cause a dangerous machine function must become active only when the guard is closed
and locked.
ÌOpening the guard must trigger a stop command.
ÌClosing and locking 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.
If monitoring of the guard locking for process protection is optional, the following applies:
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 must trigger 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.
If the evaluation of the actuator code has a high coding level, the following applies:
ÌThe 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 tampering. The system
thus possesses a high coding level.
If the evaluation of the actuator code has a low coding level, the following applies:
ÌFor evaluation with a low coding level, 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. There is no exact comparison of the actuator code
with the taught-in code in the safety switch. The system possesses a low coding level.

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
6(translation of the original operating instructions) MAN20001531-02-02/23
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 allowed to be operated only in conjunction with the intended EUCHNER actuators and the related con-
nection components from EUCHNER. On the use of different actuators or other connection components, EUCHNER provides
no warranty for safe function.
Safety switches in the version CTS-…-BR can be integrated into a BR device chain. 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 speci-
cations of the device in question.
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 according to Table 1: System components.

7
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
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. Function on page 9).
ÌSafety characteristics: category, Performance Level, PFHD(see chapter 16. Technical data on page 38).
The following additionally applies in a BR series connection:
ÌThe safety outputs are switched on only when the device receives a corresponding signal from its predecessor in the chain.
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ISO13849-1:2015can be used
for calculation.

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
8(translation of the original operating instructions) MAN20001531-02-02/23
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
Ìafter any reconguration of the device
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 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.
ÌPrevent bypassing by means of replacement actuators (only for low coding level evaluation). For this
purpose, restrict access to actuators and to keys for releases, for example.
ÌMake sure the guard cannot be closed unintentionally, e.g. during servicing. For this purpose, a
lockout bar can be used, for instance.
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.
NOTICE
Risk of damage
ÌThe guard locking function can no longer be ensured if an actuator is broken. Opening the door will
immediately switch off the safety outputs. Regularly check the actuator for mechanical damage.
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.

9
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
6. Function
The device monitors the position of movable guards.
The system consists of the following components: coded actuator (transponder) and switch.
The coding level of the system depends on the conguration of the device (see chapter 13.1.
Conguring device and teaching-in actuator for the rst time on page 31).
When the guard is closed, the actuator is moved into the safety switch. When the operating
distances are reached, power is supplied to the actuator by the switch and data are transferred.
The door position1 signal OD is set if a permissible code is detected. Guard locking is activated
automatically if power is present at the guard locking solenoid. The switching conditions for the safety outputs depend on
the conguration of guard lock monitoring for process protection (see chapter 6.4. Switching states on page 11).
If there is a fault in the safety switch, the safety outputs are switched off and the DIA LED illuminates or ashes red (see
chapter 15.3. Error messages on page 36). The occurrence of faults is detected at the latest on the next demand to
close the safety outputs (e.g.on starting).
6.1. Monitoring of the guard locking for process protection
The device is congured with the aid of the function actuator. Depending on the function actuator taught-in, the monitoring of
the guard locking for process protection is permanently active or available as an additional option. Further information about
the possible settings is available in chapter 13.1. Conguring device and teaching-in actuator for the rst time on page 31.
If monitoring of the guard locking for process protection is active, the following applies:
All versions feature two safe outputs for monitoring the guard locking for process protection. The safety outputs
FO1A and FO1B are switched off and the guard locking signal OL is cleared when guard locking is released.
If monitoring of the guard locking for process protection is optional, the following applies:
All versions feature two safe outputs for monitoring the door position as well as the status signal OL for monitoring
the guard locking for process protection; this signal can be evaluated optionally. The safety outputs FO1A and FO1B
are switched off and the door position1 signal OD is cleared when the guard is opened.
6.2. Monitoring outputs/status bits
Depending on version, the signals listed in the following are available as a status bit or at the monitoring output. The status
bits are evaluated via the BR/IO-Link Gateway. Please refer to the corresponding data sheet for further information.
6.2.1. Guard locking signal OL
The guard locking signal is present if the guard locking is active.
6.2.2. Door position1 signal OD
The door position1 signal is sent as soon as the actuator is inserted into the switch head (state: guard closed and not
locked). The signal is also present if the guard locking is active.
6.2.3. Door position2 signal OT
The door position2 signal is present if the actuator is completely inserted in the switch head and the guard locking can be
activated. In normal ambient conditions, the signal OT is sent after the signal OD as an additional door monitoring contact.
The signal is also present if the guard locking is active (see chapter 6.4. Switching states on page 11).
Switch Coded actuator

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
10 (translation of the original operating instructions) MAN20001531-02-02/23
6.2.4. Diagnostic signal OI
The diagnostic signal is present if there is an error (switch-on condition as for DIA LED).
6.2.5. Escape release signal OER
The escape release signal is present if the device has been released manually or if manual release prevents activation
of guard locking (see chapter 7. Manual release on page 12). The signal is reset when the guard locking control state
matches the guard locking state.
6.2.6. Status signal OM
The status signal is present if the device’s safety outputs are switched.
6.2.7. Locking element signal OLS
The locking element signal is present if the locking element is stuck and guard locking cannot be released. The signal is
reset as soon as the actuator is no longer under tensile stress or the locking element is no longer jammed.
6.2.8. Communication connection C
A monitoring output with the sufx C has the additional function of providing a communication connection to a BR/IO-Link
Gateway. The switch delivers cyclical and acyclical data. You will nd an overview of the communication data in chapter12.
Using communication data on page 28.
If no BR/IO-Link Gateway is connected, this output behaves like a monitoring output.
6.3. Guard locking for process protection
(guard locking actuated by power-ON and released by spring force)
Important!
Malfunctions due to incorrect use.
ÌThe actuator must not be under tensile stress during release.
ÌThe guard locking is activated only if the electronics operating voltage is applied to the device in
addition to the voltage at the guard locking solenoid.
The magnetically actuated guard locking operates in accordance with the open-circuit current principle. If the voltage is
interrupted at the solenoid, the guard locking is released and the guard can be opened directly.
The guard can be opened as long as there is no voltage at the guard locking solenoid or no electronics operating voltage
at the device.
If power is applied to the guard locking solenoid and the actuator is completely inserted, the guard locking pin is held in the
extended position and the guard is locked.
Activating guard locking: close guard; apply voltage to the solenoid and apply electronics operating voltage.
Releasing guard locking: disconnect voltage from the solenoid or disconnect electronics operating voltage.

11
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
6.4. Switching states
The detailed switching states for your switch can be found in chapter 15. Status and error messages on page 34. All
safety outputs, signals and display LEDs are described there.
Guard closed and locked Guard closed and not
locked, ready for locking Guard closed and not locked Guard open
Power at the guard locking
solenoid on off off irrelevant
Safety outputs FO1A and FO1B on
off on off on
off
Guard locking signal OL on off off off
Door position1 signal OD on on on off
Door position2 signal OT on on off off

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
12 (translation of the original operating instructions) MAN20001531-02-02/23
7. Manual release
Some situations require the guard locking to be released manually (e.g. malfunctions or an emergency). A function test must
be performed after release.
More information on this topic can be found in the standard ENISO14119:2013, section 5.7.5.1. The device can feature
the following release functions:
7.1. Auxiliary release
If malfunctions occur, the guard locking can be released with the auxiliary release irre-
spective of the state of the solenoid.
Important!
ÌThe actuator must not be under tensile stress during manual
release.
ÌTo prevent tampering, the auxiliary release must be sealed with
sealing lacquer, for example, before the switch is set up.
ÌLoss of the release function due to mounting errors or damage
during mounting.
ÌCheck the release function every time after mounting.
ÌThe auxiliary release is not a safety function.
ÌThe correct function must be checked at regular intervals.
ÌObserve the notes on any available data sheets.
7.1.1. Actuating auxiliary release
1. Remove seal or make a hole.
2. Using a screwdriver, turn the auxiliary release to in the direction of the arrow.
¨If the guard locking was activated, it is unlocked.
If monitoring of the guard locking for process protection is active, the following applies:
¨The guard locking signal OL and the safety outputs are switched off.
If monitoring of the guard locking for process protection is optional, the following applies:
¨The guard locking signal OL is switched off.
¨The STATE LED ashes alternately white/orange slowly.
The LOCK LED ashes orange slowly.
3. Using a screwdriver, turn the auxiliary release to in the opposite direction to the arrow to reset.
4. Seal with sealing lacquer.
5. Close guard or disconnect voltage from solenoid.
¨The device operates normally again.
6. Check correct function of the device.
Auxiliary release
on the front
Auxiliary release
on the rear

13
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
7.2. Escape release
The escape release can be retrotted.
The escape release permits opening of a locked guard from the danger zone without tools (see
chapter 16.3. Dimension drawing for safety switch CTS on page 42).
Important!
ÌIt must be possible to actuate the escape release manually from inside
the protected area without tools.
ÌIt must not be possible to reach the escape release from the outside.
ÌThe actuator must not be under tensile stress during manual release.
ÌThe escape release meets the requirements of Category B according
to ENISO13849-1:2015.
7.2.1. Actuating escape release
1. Press the red release knob to the end stop.
¨If the guard locking was activated, it is unlocked.
If monitoring of the guard locking for process protection is active, the following applies:
¨The guard locking signal OL and the safety outputs are switched off.
If monitoring of the guard locking for process protection is optional, the following applies:
¨The guard locking signal OL is switched off.
¨The STATE LED ashes alternately white/orange slowly.
The LOCK LED ashes orange slowly.
2. Pull out the escape release knob to reset the escape release.
3. Close guard or disconnect voltage from solenoid.
¨The device operates normally again.
4. Check correct function of the device.
Escape release

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
14 (translation of the original operating instructions) MAN20001531-02-02/23
8. 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 14119:2014, sections 5.2 and 5.3, for information about mounting the safety switch
and the actuator. The following specications must be observed:
- Mounting with screws of property class 8.8 or higher.
- The minimum screw diameter is 5mm.
- Secure the xing material against loosening (e.g. by means of medium-strength positive screw
locking).
ÌProtect the switch against damage, as well as against penetrating foreign objects such as swarf,
sand and blasting shot, etc.
ÌObserve the min. door radii (see chapter 16.4.1. Dimension drawing for actuatorA-FLX-D-0.-… on page
43).
ÌObserve the maximum permissible inclination angles between switch and actuator (see Fig. 4).
ÌObserve the tightening torque for fastening the switch and the actuator (see Fig. 3):
- Actuator: 6Nm
- Switch head: 6Nm
- Switch housing: 3Nm
ÌActuator and safety switch must be mounted such that the actuator is perpendicularly and complete-
ly inserted into the switch when the guard is closed (see Fig. 2). The guard locking function is not
assured if installation is incorrect.
ÌThe locking screw of the auxiliary release must be sealed before setup, e.g. with sealing lacquer.
ÌWhen mounting several safety switches, observe the stipulated minimum distance to avoid mutual
interference.
20
20
50

15
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
If monitoring of the guard locking for process protection is optional, the following applies:
Important!
ÌFrom the assured release distance Sar, the safety outputs are safely shut down. To achieve
the assured release distance Sar, the actuator must be pulled completely out of the switch
head.
ÌTo achieve the assured operating distances Sao, the actuator must be inserted completely
into the switch head.
Fig. 1: Front (A) and side (B, C) mounting
Fig. 2: Actuator alignment
A
C
B

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
16 (translation of the original operating instructions) MAN20001531-02-02/23
Fig. 3: Installation example
Fig. 4: Maximum actuator deection and maximum center offset
2 x M5
(6 Nm)
M5 (6 Nm)
M5 (3 Nm)
r ≥ 200
22
3,5°
3,5°
6°
6°
m = max. ± 2 mm
m
m

17
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
9. 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 (SELV).
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 prevent 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.
ÌIf the solenoid is operated with a frequency of more than 0.2Hz, the device may react with a delay.
ÌIn devices with IMP/IMM inputs, the power supply for the evaluation electronics is separate from the
power supply for the guard locking solenoid.
If different power supplies are used, they must have the same reference potential.
ÌFor device variants with two connecting cables, both cables must be laid in the same cable duct.
Important!
If the device does not appear to function when the operating voltage is applied (e.g. STATE LED does
not ash), the safety switch must be returned to the manufacturer.

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
18 (translation of the original operating instructions) MAN20001531-02-02/23
9.1. 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
to 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 UL 1) a connecting cable listed under the UL
category code CYJV/7, min. 24AWG, min. 80°C, 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).
9.2. Safety in case of faults
ÌThe operating voltage at UB and the solenoid operating voltage at IMP are reverse polarity protected.
ÌThe safety outputs FO1A/FO1B 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.
9.3. 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 UB = IUB_1 + IFO1A+FO1B + IOX1 + IOX2
IUB_1 = Switch operating current (max. 50mA)
IOX = Load current of monitoring output (max. 10mA per monitoring output)
IFO1A+FO1B = Load current of safety outputs FO1A + FO1B (2x max. 75mA)
Imax IMP = Solenoid operating current (max. 500mA)
Max. current consumption of a switch chain ΣImax UB
∑ Imax UB = IFO1A+FO1B + nx(IUB_2 + IOX1 + IOX2)
n = Number of connected switches
IUB_2 = Switch operating current (max. 80mA)
Important!
If there are further monitoring outputs, their load current must be taken into account.

19
MAN20001531-02-02/23 (translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
EN
9.4. 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:
For safety switches CTS-…-VAB-… with plug connectors 2xM12
Parameter Value Unit
Conductor cross-section, min. 0.25 mm²
R max. 80 W/km
C max. 120 nF/km
L max. 0.65 mH/km
Recommended cable type LIYY 8 x 0.25mm² or 5 x 0.34mm²
For safety switches CTS-…-VSA-… with plug connector M12, 8-pin
Parameter Value Unit
Conductor cross-section, min. 0.25 mm²
R max. 80 W/km
C max. 120 nF/km
L max. 0.65 mH/km
Recommended cable type LIYY 8x0.34mm²
9.5. Connector assignment of safety switches CTS-...-VAB-... with plug connectors 2 x M12
Plug connector
(view of connection side) Pin Designation Function
Conductor color-
ing of connecting
cable 1)
2xM12
X2.5
X1.8
X1.5
X1.6
X1.7
X1.2
X2.4
X2.3
X2.1
X2.2
X1.4
X1.3
X1.1
X1.1 FI1B Enable input, channel B WH
X1.2 UB Electronics operating voltage, 24VDC BN
X1.3 FO1A
Safety output, channelA
Active monitoring of the guard locking for process protection:
ON, if door is closed and locked.
Optional monitoring of the guard locking for process protec-
tion:
ON, if door is closed.
GN
X1.4 FO1B
Safety output, channelB
Active monitoring of the guard locking for process protection:
ON, if door is closed and locked.
Optional monitoring of the guard locking for process protec-
tion:
ON, if door is closed.
YE
X1.5 OX1 2) Door monitoring output 1 GY
X1.6 FI1A Enable input, channel A PK
X1.7 0VUB Electronics operating voltage, 0VDC BU
X1.8 - n.c. RD
X2.1 IMM Solenoid operating voltage, 0VDC BN
X2.2 OX2 2) Door monitoring output 2 WH
X2.3 - n.c. BU
X2.4 IMP Solenoid operating voltage, 24VDC BK
X2.5 - n.c. GY
1) Only for standard EUCHNERconnecting cable
2) The function of the monitoring output OX is determined by the actuator taught-in. You will nd more detailed information in the data sheet 2153710 or
at www.euchner.com.

Operating Instructions
Transponder-Coded Safety Switch CTS-C2-BP/BR-FLX
20 (translation of the original operating instructions) MAN20001531-02-02/23
9.6. Connector assignment of safety switches CTS-…-VSA-… with plug connector M12, 8-pin
Plug connector
(view of connection side) Pin Designation Function
Conductor color-
ing of connecting
cable 1)
1 x M12
8
5
6
7
2
4
3
1
1 IMP Solenoid operating voltage, 24VDC WH
2 UB Electronics operating voltage, 24VDC BN
3 FO1A
Safety output, channelA
Active monitoring of the guard locking for process protection:
ON, if door is closed and locked.
Optional monitoring of the guard locking for process protec-
tion:
ON, if door is closed.
GN
4 FO1B
Safety output, channelB
Active monitoring of the guard locking for process protection:
ON, if door is closed and locked.
Optional monitoring of the guard locking for process protec-
tion:
ON, if door is closed.
YE
5 OX1 2) Door monitoring output 1 GY
6 OX2 2) Door monitoring output 2 PK
7 0VUB Electronics operating voltage, 0VDC BU
8 IMM Solenoid operating voltage, 0VDC RD
1) Only for standard EUCHNERconnecting cable
2) The function of the monitoring output OX is determined by the actuator taught-in. You will nd more detailed information in the data sheet 2153710 or
at www.euchner.com.