EUCHNER ESM-CB User manual

EN
Operating Instructions
Safety Relay with IO-Link
for emergency stop, safety door and light grid monitoring
ESM-CB

Operating Instructions
Safety Relay with IO-Link ESM-CB
2(Translation of the original operating instructions) 2522722-01-05/19
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
3.1. Monitoring of sensor circuits...............................................................................................6
3.2. Starting behavior ............................................................................................................................6
4. Exclusion of liability and warranty ......................................................................... 7
5. General safety precautions ................................................................................... 7
6. Function............................................................................................................... 8
6.1. IO-Link communication and functions ................................................................................................8
6.1.1. Enabling from the non-safety-related control system..............................................................8
6.1.2. Chain reset........................................................................................................................8
6.2. Block diagram ................................................................................................................................9
6.2.1. Insulation coordination........................................................................................................9
6.3. Communication and functions with BR safety switches.....................................................................10
6.3.1. Diagnostic data................................................................................................................10
6.3.2. Hot plugging – replacing a BR safety switch.......................................................................10
6.4. Function of monitoring output OM ..................................................................................................10
7. Mounting............................................................................................................ 11
8. Electrical connection .......................................................................................... 12
8.1. Terminal assignment .....................................................................................................................13
8.2. Signaling device connection variants ..............................................................................................14
8.2.1. Sensor circuit S1 ..................................................................................................14
8.2.2. Sensor circuit S2.............................................................................................................14
8.3. Start circuit and feedback loop connection variants.........................................................................15
8.4. Notes about ..........................................................................................................................16
9. Application example ........................................................................................... 16
9.1. Dual-channel monitoring of emergency-stop pushbutton and safety switch chain with IO-Link ...............16
10. Setup ................................................................................................................. 18
11. Calculating the power dissipation ........................................................................ 19
12. Function test ...................................................................................................... 20

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2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
13. Device diagnostics.............................................................................................. 21
13.1. Diagnostics via LED displays .........................................................................................................21
13.1.1. General states .................................................................................................................21
13.1.2. Error messages...............................................................................................................22
14. IO-Link communication and diagnostic data......................................................... 23
14.1. Device description le ...................................................................................................................23
14.1.1. Overview of IODDs ...........................................................................................................23
14.1.2. Use of the various IODDs..................................................................................................23
14.2. Process-data structure and addressing...........................................................................................24
14.3. Cyclical data (process data)...........................................................................................................24
14.3.1. Input data........................................................................................................................24
14.3.2. General description of the process data ............................................................................25
14.3.3. Output data .....................................................................................................................25
14.4. Acyclical data (device data and events)...........................................................................................26
14.4.1. Writing and reading services.............................................................................................26
14.5. Communication with BR devices.....................................................................................................28
14.6. Error table for BR devices .............................................................................................................29
15. Technical data .................................................................................................... 30
15.1. Safety relay ESM-CB .....................................................................................................................30
15.2. Function and time diagrams...........................................................................................................35
15.2.1. Time diagram for automatic start ......................................................................................35
15.2.2. Time diagram for manual, monitored start .........................................................................35
15.3. Derating.......................................................................................................................................36
15.3.1. Vertical or horizontal installation orientation........................................................................36
15.4. Load curve...................................................................................................................................36
15.4.1. Resistive and inductive loads ............................................................................................36
16. Ordering information and accessories................................................................. 37
17. Inspection and service ........................................................................................ 37
18. Service .............................................................................................................. 38
19. Declaration of conformity ................................................................................... 39

Operating Instructions
Safety Relay with IO-Link ESM-CB
4(Translation of the original operating instructions) 2522722-01-05/19
1. About this document
1.1. Scope
This document is valid for:
ÌSafety Relay with IO-Link for emergency stop, safety door and light grid monitoring ESM-CB
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. These persons must also be familiar with the safety concept underlying
this customer-specic solution.
1.3. Key to symbols
Symbol/depiction Meaning
Printed document
Internet
www Document is available for download at www.euchner.com
Document on CD
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 and
maintenance for safety
relay ESM-CB
(2522723)
Basic information for safe setup and service
Operating instructions for
safety relay ESM-CB
(2522722)
(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
2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
2. Correct use
The safety relay is used to monitor safety-related signaling devices and to control actuators. The safety circuit monitors
two sensor circuits. Each sensor circuit can have one or two channels. When at least one sensor circuit is interrupted, the
safety relay initiates the safe state. The safety relay interrupts safety circuits in a safety-related manner.
Possible signaling devices:
ÌEmergency stop pushbuttons
ÌSafety door interlocks
ÌLight grids
Before use, a risk assessment must be performed on the machine, e.g. in accordance with:
ÌENISO13849-1, Safety of machinery – Safety-related parts of control systems – Part 1: General principles for design
ÌENISO12100, Safety of machinery – General principles for design – Risk assessment and risk reduction
ÌENIEC62061, Safety of machinery – Functional safety of safety-related electrical, electronic and programmable elec-
tronic control systems
Correct use includes observing the relevant requirements for installation and operation, e.g.:
ÌENISO13849-1, Safety of machinery – Safety-related parts of control systems – Part 1: General principles for design
ÌEN60204-1, Safety of machinery – Electrical equipment of machines – Part 1: General requirements
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.
ÌCorrect use requires observing the permissible operating parameters (see chapter 15. Technical
data).
ÌOnly components that are intended for combination with the device may be used. Also observe the
operating instructions for the components used (see chapter 1.4. Supplementary documents)

Operating Instructions
Safety Relay with IO-Link ESM-CB
6(Translation of the original operating instructions) 2522722-01-05/19
3. Description of the safety function
3.1. Monitoring of sensor circuits
The safety circuit monitors two sensor circuits. Each sensor circuit can have one or two channels.
The safety relay can be operated only if both sensor circuits are used. If only one sensor circuit is used, the second sensor
circuit must be bridged.
The sensor circuits evaluate various signaling devices:
ÌSensor circuitS1 with short circuit detection; suitable for single- or dual-channel safety sensors
ÌSensor circuitS2 suitable for OSSD signals; short circuit detection by signaling device
See chapter 6.2. Block diagram.
Single-channel sensor circuit
ÌThe sensor circuit is not redundant.
ÌThe safety relay does not detect short circuits in the sensor circuit.
Dual-channel sensor circuit
ÌThe dual-channel sensor circuit is connected equivalently.
ÌThe safety relay detects short circuits in the sensor circuit when wired accordingly.
See chapter 8.2. Signaling device connection variants.
3.2. Starting behavior
Start conditions
ÌBoth sensor circuits are closed
ÌEnable signal present
The enable signal is a signal sent from the control system via IO-Link.
See chapter 6.1.1. Enabling from the non-safety-related control system.
Automatic start
The device starts automatically when the start conditions are met.
Manual, monitored start
When the start conditions are met, the device starts after the start circuit has been closed and then opened again by the
start button being pressed and released.
A connected start button is monitored.
See chapter 8.3. Start circuit and feedback loop connection variants.
Safe shut-down
Safety contacts 13/14 and 23/24 open without delay when at least one sensor circuit is interrupted.
The device is in the safe state when the safety contacts are open.

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2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
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
WARNING
Danger to life due to improper installation or due to bypassing (tampering). Safety components fulll
a personnel protection function.
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.
ÌThe number of teach-in and switching operations is saved in the internal memory of the evaluation
unit. If necessary, this memory can be read by the manufacturer.
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. EUCHNER cannot provide any
warranty in relation to the readability of the CD for the storage period required. For this reason you
should archive a printed copy of the operating instructions. You can download the operating instruc-
tions from www.euchner.com.

Operating Instructions
Safety Relay with IO-Link ESM-CB
8(Translation of the original operating instructions) 2522722-01-05/19
6. Function
6.1. IO-Link communication and functions
The safety relay is an IO-Link device.
Communication via IO-Link offers cyclical (process data) and acyclical (device data and events) data exchange.
Important!
The cyclical and acyclical data can be found in chapter 14. IO-Link communication and diagnostic data.
The following information is transmitted:
ÌDevice information of the safety relay (electronic rating plate, states of the device)
ÌState information about connected BR safety switches
IO-Link communication can be used for the following functions as well:
ÌEnable signal: non-safety-related signal for controlling the safety contacts of the safety relay
ÌChain reset: performing a reset of the BR safety switch chain
6.1.1. Enabling from the non-safety-related control system
The safety contacts of the safety relay can be controlled via a non-safety-related enable signal via IO-Link communication.
The start button does not have to be pressed again.
When the safety relay detects an IO-Link connection, the enable signal must be set accordingly via IO-Link communication
for operation.
This function is not relevant to safety and is subordinate to the safety engineering function of the safety relay. In other words,
the non-safety-related enable signal cannot start the safety contacts of the safety relay until the safety-relevant prerequisites
for sensor circuits and the starting circuit of the safety relay have been fullled.
The enable signal is controlled via cyclical data exchange (process data).
6.1.2. Chain reset
All BR safety switches in a chain can be centrally restarted with a chain reset via IO-Link communication.
This function facilitates the re-establishment of readiness after troubleshooting.
The chain reset command is controlled via cyclical data exchange (process data).

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2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
6.2. Block diagram
Safety
Inputs
OM
ID/C
Safety
Contacts
LOGIC
13 23
14 24
IO-Link
Slave
S11
0V
A2
UB
A1
C/QL+ L-
S10 S12
Start
S21
OSSD
S32
OSSD
S34
ESM
S14
Figure 1: Block diagram
A1
Power supply 24VDC
A2
Power supply 0V
S10
Supply input for S14
S11
Supply output for S12 and S21
S12
Sensor circuit S1 input (channel1)
S14
Sensor circuit S1 input (channel2)
S21 Start circuit
S32
OSSD sensor circuitS2 input (channel1)
S34 OSSD sensor circuitS2 input (channel2)
13/14
Safety contacts, non-time-delay
23/24
ID/C
Safety switch diagnostic input
OM
Digital monitoring output
L+/L-
IO-Link supply
C/Q
IO-Link switching and communication line
6.2.1. Insulation coordination
WARNING
Loss of electrical safety
ÌTake measures outside the device to limit transient overvoltages to the respective valve for over-
voltage category II.
 A1/A2, Logic IO-Link 13/14 23/24 Housing
A1/A2, Logic - 0.5kV ST 4kV ST 4kV ST 4kV BI
IO-Link - - 4kV ST 4kV ST 4kV BI
13/14 - - - 4kV ST 4kV BI
23/24 - - - - 4kV BI
Housing - - - - -
Key:
BI Basic insulation
ST Safe isolation
Logic Sensor and start circuits, diagnostic input monitoring output
IO-Link IO-Link supply, IO-Link switching and communication line

Operating Instructions
Safety Relay with IO-Link ESM-CB
10 (Translation of the original operating instructions) 2522722-01-05/19
6.3. Communication and functions with BR safety switches
6.3.1. Diagnostic data
The ID/C connection of the safety relay allows the diagnostic line of a BR safety switch chain to be connected.
The ID/C connection represents a non-safety-related communication channel between the safety relay and the safety switches.
The switches address the individual switches when the safety switch chain starts up. Addressing permits unique diagnostics
for each safety switch.
The safety relay synchronizes itself with the safety switch chain after a restart. All safety switches are then available for
communication and diagnostics. The safety contacts can be enabled only after establishment of complete BR communication.
6.3.2. Hot plugging – replacing a BR safety switch
A safety switch within a BR safety switch chain can be replaced during operation. This process is called hot plugging.
In order to perform correct addressing after replacement, only one safety switch can be replaced at a time (1:1 replacement).
If another safety switch is to be replaced, the required switch-on delay of the previously replaced switch must be taken into
account.
Important!
Observe the technical data of the BR safety switch in the corresponding product documentation.
6.4. Function of monitoring output OM
The signal level of the monitoring output is equivalent to the state of the safety relay’s safety contacts.
The monitoring output is active (HIGH level) when the safety contacts are closed.
The monitoring output is inactive (LOW level) when at least one safety contact is open.

11
2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
7. Mounting
NOTICE
Device damage due to improper installation or unsuitable ambient conditions.
ÌThe safety relay must be installed in a control cabinet protected against dust and moisture, with
a minimum degree of protection of IP54. A snap-in element on the rear of the device is used for
fastening to a mounting rail.
ÌWhen mounting several evaluation units side by side in a control cabinet without air circulation
(e.g.fan), note that a minimum distance of 10mm must be maintained between the evaluation
units. This distance enables the heat from the evaluation unit to dissipate. Observe the derating in
chapter 15.3.
ÌMount the device on a 35-mm mounting rail according to EN60715.
ÌLoosen the locking foot using a screwdriver to remove.
Figure 2: Mounting and removing

Operating Instructions
Safety Relay with IO-Link ESM-CB
12 (Translation of the original operating instructions) 2522722-01-05/19
8. Electrical connection
WARNING
If there is a mistake, loss of the safety function due to incorrect connection.
ÌMonitoring outputs must not be used as safety outputs.
ÌLay the connecting cables with protection to prevent the risk of short circuits.
NOTICE
Risk of damage to equipment or malfunctions as a result of incorrect connection.
ÌAll the electrical connections must either be isolated from the mains supply by a safety transform-
er according to IEC 61558-2-6 with limited output voltage in the event of a fault, or by other equiv-
alent isolation measures.
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. The switch-on current may have to
be limited for capacitive loads.
ÌProtect the 24 V area with a suitable external fuse.
ÌMake sure that the power supply unit can provide quadruple the nominal current of the external
fuse in order to guarantee reliable triggering in case of a fault.
A
A
B8 mm
AWG 24-16
0,2-1,5 mm
2
Figure 3: Cable connection (spring terminal)
Tip!
ÌIt is recommended to use cable end sleeves for connecting exible cables

13
2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
8.1. Terminal assignment
DIA
PWR
STATE1
STATE2
K1/K2
IO-Link
24
L-L+C/Q
ID/C
S10
S11
A1 A2 S21
S14
S34S32
S12
231413
ESM-CB
OMOM
A1 Power supply 24VDC
A2 Power supply 0V
S10 Supply input for S14
S11 Supply output for S12 and S21
S12 Sensor circuit S1 input (channel1)
S14 Sensor circuit S1 input (channel2)
S21 Input for start circuit
S32 OSSD sensor circuitS2 input (channel1), input for FO1A from BR series connection
S34 OSSD sensor circuitS2 input (channel2), input for FO1B from BR series connection
PWR Power LED (green, yellow, red)
DIA Diagnostic message present indication; LED (red)
IO-Link IO-Link communication status indication; LED (green)
STATE 1 Sensor circuitS1 status indication; LED (green)
STATE 2 Sensor circuitS2 status indication; LED (green)
K1/K2 Safety circuit K1 and K2 status indication; LED (green)
13/14 Safety contact, non-time-delay
23/24 Safety contact, non-time-delay
ID/C Safety switch diagnostic input
OM Digital monitoring output
C/Q IO-Link switching and communication line
L+/L- IO-Link supply

Operating Instructions
Safety Relay with IO-Link ESM-CB
14 (Translation of the original operating instructions) 2522722-01-05/19
8.2. Signaling device connection variants
Important!
The safety relay can be operated only if both sensor circuits are used. If only one sensor circuit is
used, the second sensor circuit must be bridged.
8.2.1. Sensor circuit S1
WARNING
Danger due to the machine restarting automatically
ÌLow-resistance PLC outputs can be interpreted as a permanent High signal (permanently switched
on) at input S14 of the safety relay. Safe shut-down via a low-resistance PLC output at S14 is
therefor not possible.
- Do not use any low-resistance PLC outputs at input S14.
ÌConnect suitable signaling devices to S11/S12/S10/S14.
1 2
S11 S14S10 S12 S11 S14S10 S12 S11S14S10S12
3
Figure 4: Sensor circuit S1 connection variants
Key:
1Dual-channel connection with short-circuit detection
2Dual-channel connection without short-circuit detection
3Single-channel connection
8.2.2. Sensor circuit S2
Important!
Sensor circuit S2 does not offer short circuit detection. If short-circuit detection is required, this must
be performed externally by means of suitable signaling devices.
ÌConnect suitable signaling devices to S32/S34.
1
S34S32 S34S32 S34S32
24 V DC 24 V DC
OSSD
23
Figure 5: Sensor circuit S2 connection variants
Key:
1Dual-channel connection with external short circuit detection by the signaling device
2Dual-channel connection without short-circuit detection
3 Single-channel connection

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2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
8.3. Start circuit and feedback loop connection variants
WARNING
Danger due to the machine restarting automatically
ÌWhen the manual reset function is used with monitored starting, a short circuit between A2/S21/0
V can the cable of the start button can cause the machine to start up automatically. This applies in
particular to safety functions with a high risk potential.
- Rule out a short circuit between A2/S21/0 V and the cable from the start button to S21 by de-
sign measures (see fault exclusion according to ENISO13849-2).
ÌLow-resistance PLC outputs can be interpreted as a ground signal at input S21 of the safety relay
and can cause an automatic start.
Automatic start
ÌBridge contacts S10/S21.
Manual, monitored start
ÌConnect a start button to S11/S21.
A connected start button is monitored.
Start circuit and feedback loop
ÌTo monitor external contactors or expansion devices with positively driven contacts, place the respective NC contacts in
the path S10/S21 or S11/S21.
1
K3
K4
2
K3
K4
3
S21S10
0V
S21S10
0V
S21S11
24 V DC
S21S11
24 V DC
4
Figure 6: Start circuit and feedback loop connection variants
Key:
1Automatic start
2Automatic start with monitored contact expansion
3Manual, monitored start with monitored contact expansion
4Manual, monitored start

Operating Instructions
Safety Relay with IO-Link ESM-CB
16 (Translation of the original operating instructions) 2522722-01-05/19
8.4. Notes about
Important!
ÌFor use and operation as per the requirements 1), a power supply with the feature “for use in
class 2 circuits” must be used.
Alternative solutions must comply with the following requirements:
- Electrically isolated power supply unit with a max. open-circuit voltage of 30V/DC and a limited
current of max. 8A.
ÌUse cable material made of copper with a temperature resistance of 60°C/75°C.
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. Application example
9.1. Dual-channel monitoring of emergency-stop pushbutton and safety switch chain
with IO-Link
WARNING
Loss of functional safety
ÌMake sure that the signaling device and the safety relay have the same ground potential.
Important!
Observe the information about applications with BR safety switches in the corresponding product
documentation.
Description of the application:
ÌDual-channel emergency-stop monitoring on sensor circuit S1
ÌDual-channel monitoring of the safety switch chain on sensor circuit S2
ÌManual, monitored start of the safety relay by start relay S1 (connection S21)
ÌMonitoring of external, positively driven contactors in the start circuit at S21
ÌIO-Link connection of the safety relay to the IO-Link master
Achievable safety integrity:
ÌSuitable up to category4, PLe (ENISO13849-1), SIL3 (EN62061)

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2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
Safety
Outputs
Monitoring
Output
Read Head
+UB
2
FI1A
6
FI1B
1
0V
7
OD/C
5
FO1A
3
FO1B
4
NC
8
CES
Safety Inputs
Safety
Inputs
Start
OM
ID/C
Safety
Contacts
LOGIC
13 23
14 24
IO-Link
Slave
S21S12
0V
A2
UB
A1
C/QL+ L-
C/QL+ L-
S10 S11
OSSD
S32
OSSD
S34
ESM
IO-Link
Master
K3 K4
0 V
24 V DC
S1
K3
K4
S2
Safety
Outputs
Monitoring
Output
Read Head
+UB
2
FI1A
6
FI1B
1
0V
7
OD/C
5
FO1A
3
FO1B
4
NC
8
CES
Safety Inputs
Safety
Outputs
Monitoring
Output
Read Head
+UB
2
FI1A
6
FI1B
1
0V
7
OD/C
5
FO1A
3
FO1B
4
NC
8
CES
Safety Inputs
F1 F3F2
S14
Figure 7: Monitoring of emergency-stop pushbutton and safety switch chain with IO-Link
Key:
S1 Emergency stop pushbutton
S2 Manual resetting device
S3…S5 BR safety switch
F1…F3 External fuses
K3/K4 Positively driven contactors

Operating Instructions
Safety Relay with IO-Link ESM-CB
18 (Translation of the original operating instructions) 2522722-01-05/19
10. Setup
WARNING
ÌIn emergency stop applications, automatic machine startup can pose a severe danger to the oper-
ator.
- Prevent the machine from being started up again automatically by the higher-level control system.
ÌAccording to ENISO13849-1, the manual, monitored resetting device must not trigger a machine
start.
ÌInductive loads can lead to welded relay contacts.
- Implement suitable, effective suppressor circuits on inductive loads.
- Connect the suppressor circuits in parallel with the load, not in parallel with the switching contact.
ÌMagnetic elds can affect the device.
- The magnetic eld strength in the surroundings must not exceed 30A/m.
- Do not use the device near strong magnetic elds (e.g. due to transformers or magnetite).
ÌInterference can be emitted during the operation of relay modules. Radio reception in residential
areas can be disturbed.
The device is a class-A product.
- Observe the requirements for emitted interference for electrical and electronic equipment
(EN61000-6-4).
- Take appropriate protective measures against emitted interference.
Integrating the device description le
ÌIntegrate the suitable device description le (IODD) into the engineering tool in accordance with the number of connect-
ed BR safety switches (see chapter 14.1. Device description le).
ÌDownload the conguration to the IO-Link master.
Setting up the safety relay
ÌConnect the power supply (24VDC) to terminals A1/A2.
ÌConnect the IO-Link supply L+/L- and the switching and communication cable C/Q to the corresponding port of the IO-
Link master.
¨The PWR LED illuminates green.
¨The IO-Link LED ashes green once IO-Link communication has been established.
ÌConnect the sensor circuits in accordance with their wiring (see chapter 8.2. Signaling device connection variants).
Activating the enable signal
ÌTo control the safety contacts, set the enable signal via the cyclical data item in byte 0, bit 0 (see chapter 14.3. Cyclical
data (process data)).
Automatic start
¨Close safety contacts 13/14 and 23/24.
¨LED K1/K2 illuminates green.
Manual, monitored start
ÌPress the start button.
ÌRelease the start button.
¨Close safety contacts 13/14 and 23/24.
¨LED K1/K2 illuminates green.
Possible diagnoses
The status information of the individual BR safety switches and the device information of the safety relay can be processed
by the cyclical data (see chapter 14.3. Cyclical data (process data)).

19
2522722-01-05/19 (Translation of the original operating instructions)
Operating Instructions
Safety Relay with IO-Link ESM-CB
EN
11. Calculating the power dissipation
Important!
The total power dissipation of the safety relay results from the input power dissipation and the contact
power dissipation with equal or differing load currents.
Input power dissipation
Pinput=UB²/(US/IS)
PIO-Link=UBIOL²/(UIOL/IIOL)
Contact power dissipation
With equal load currents:
Pcontact=n*IL²*50mΩ
With differing load currents:
Pcontact=(IL1²+IL2²)*50mΩ
Total power dissipation
Ptotal=Pinput+PIO-Link + Pcontact
therefore
Ptotal=UB²/(US/IS)+ UBIOL²/(UIOL/IIOL) +nIL²*50mΩ
or
Ptotal=UB²/(US/IS)+ UBIOL²/(UIOL/IIOL) +(IL1²+IL2²)*50mΩ
Key:
PPower dissipation in mW
UBConnected operating voltage at A1 and A2
USRated control circuit supply voltage
ISRated control supply current
UBIOL Connected IO-Link periphery supply voltage
UIOL IO-Link rated periphery supply voltage
IIOL IO-Link port supply current consumption
nNumber of safety contacts used
ILContact load current

Operating Instructions
Safety Relay with IO-Link ESM-CB
20 (Translation of the original operating instructions) 2522722-01-05/19
12. Function test
WARNING
Loss of functional safety due to malfunction.
ÌProper function of the device can no longer be ensured if the function test is faulty.
- Replace the device.
1. Switch on operating voltage.
2. Close all guards.
¨Automatic start: the machine can start.
¨Manual start: the machine may start only after you have pressed the start button.
3. Open the guard.
¨The machine must switch off and it must not be possible to start it as long as the guard is open.
4. Close the guard
¨Automatic start: the machine can start.
¨Manual start: the machine may start only after you have pressed the start button.
Repeat steps 2 … 4 separately for each guard.