EUCHNER ESM-CB Operating Instructions Manual
Operating Instructions
Safety Relay with IO-Link
for emergency stop, safety door and light grid monitoring
ESM-CB
EN
Operating Instructions
Safety Relay with IO-Link ESM-CB
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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Operating Instructions
Safety Relay with IO-Link ESM-CB
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
2522722-01-05/19 (Translation of the original operating instructions)
EN
3
Operating Instructions
Safety Relay with IO-Link ESM-CB
1. About this document
1.1. Scope
This document is valid for:
Ì Safety 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-specic solution.
1.3. Key to symbols
Symbol/depiction Meaning
Printed document
www
DANGER
WARNING
Document is available for download at www.euchner.com
Document on CD
Safety precautions
Danger of death or severe injuries
Warning about possible injuries
Caution slight injuries possible
CAUTION
Notice about possible device damage
NOTICE
Important!
Tip Useful information
Important information
1.4. Supplementary documents
The overall documentation for this device consists of the following documents:
Document title
(document number)
Safety information and
maintenance for safety
relay ESM-CB
(2522723)
Operating instructions for
safety relay ESM-CB
(2522722)
Possibly enclosed data
sheet
Contents
Basic information for safe setup and service
(this document)
Item-specic 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. in the search box.
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Operating Instructions
Safety Relay with IO-Link ESM-CB
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:
Ì Emergency stop pushbuttons
Ì Safety door interlocks
Ì Light grids
Before use, a risk assessment must be performed on the machine, e.g. in accordance with:
Ì ENISO13849-1, Safety of machinery – Safety-related parts of control systems – Part 1: General principles for design
Ì ENISO12100, Safety of machinery – General principles for design – Risk assessment and risk reduction
Ì ENIEC62061, 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.:
Ì ENISO13849-1, Safety of machinery – Safety-related parts of control systems – Part 1: General principles for design
Ì EN60204-1, Safety of machinery – Electrical equipment of machines – Part 1: General requirements
Important!
Ì The 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 ENISO13849-2.
Ì Correct use requires observing the permissible operating parameters (see chapter 15. Technical
data).
Ì Only 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)
2522722-01-05/19 (Translation of the original operating instructions)
EN
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Operating Instructions
Safety Relay with IO-Link ESM-CB
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:
Ì Sensor circuitS1 with short circuit detection; suitable for single- or dual-channel safety sensors
Ì Sensor circuitS2 suitable for OSSD signals; short circuit detection by signaling device
See chapter 6.2. Block diagram.
Single-channel sensor circuit
Ì The sensor circuit is not redundant.
Ì The safety relay does not detect short circuits in the sensor circuit.
Dual-channel sensor circuit
Ì The dual-channel sensor circuit is connected equivalently.
Ì The 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
Ì Both sensor circuits are closed
Ì Enable 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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Operating Instructions
Safety Relay with IO-Link ESM-CB
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 fulll
a personnel protection function.
Ì Mounting, 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.
Ì The 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 instructions from www.euchner.com.
2522722-01-05/19 (Translation of the original operating instructions)
EN
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Operating Instructions
Safety Relay with IO-Link ESM-CB
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:
Ì Device information of the safety relay (electronic rating plate, states of the device)
Ì State information about connected BR safety switches
IO-Link communication can be used for the following functions as well:
Ì Enable signal: non-safety-related signal for controlling the safety contacts of the safety relay
Ì Chain 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 fullled.
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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6.2. Block diagram
A1
A2
S10
S11
S12
S14
S32
13/14
23/24
ID/C
OM
L+/L-
C/Q
UB
A1
S14
LOGIC
S11
S10 S12
S21
Start
S32
OSSD
Safety
Inputs
Operating Instructions
Safety Relay with IO-Link ESM-CB
S34
OSSD
ID/C
13 23
Safety
Contacts
ESM
A2
0V
IO-Link
Slave
Figure 1: Block diagram
Power supply 24VDC
Power supply 0V
Supply input for S14
Supply output for S12 and S21
Sensor circuit S1 input (channel1)
Sensor circuit S1 input (channel2)
S21 Start circuit
OSSD sensor circuitS2 input (channel1)
S34 OSSD sensor circuitS2 input (channel2)
Safety contacts, non-time-delay
Safety switch diagnostic input
Digital monitoring output
IO-Link supply
IO-Link switching and communication line
C/QL+ L-
OM
14 24
6.2.1. Insulation coordination
WARNING
Loss of electrical safety
Ì Take 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 - 0.5kV ST 4kV ST 4kV ST 4kV BI
IO-Link - - 4kV ST 4kV ST 4kV BI
13/14 - - - 4kV ST 4kV BI
23/24 - - - - 4kV 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
EN
2522722-01-05/19 (Translation of the original operating instructions)
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Operating Instructions
Safety Relay with IO-Link ESM-CB
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.
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7. Mounting
NOTICE
Device damage due to improper installation or unsuitable ambient conditions.
Ì The 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.
Ì When mounting several evaluation units side by side in a control cabinet without air circulation
(e.g.fan), note that a minimum distance of 10mm 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.
Ì Mount the device on a 35-mm mounting rail according to EN60715.
Ì Loosen the locking foot using a screwdriver to remove.
Operating Instructions
Safety Relay with IO-Link ESM-CB
Figure 2: Mounting and removing
EN
2522722-01-05/19 (Translation of the original operating instructions)
11
Operating Instructions
AWG 24-16
2
Safety Relay with IO-Link ESM-CB
8. Electrical connection
WARNING
If there is a mistake, loss of the safety function due to incorrect connection.
Ì Monitoring outputs must not be used as safety outputs.
Ì Lay 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.
Ì All 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 equivalent isolation measures.
Ì All 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.
Ì Protect the 24 V area with a suitable external fuse.
Ì Make 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.
0,2-1,5 mm
B
A
8 mm
A
Figure 3: Cable connection (spring terminal)
Tip!
Ì It is recommended to use cable end sleeves for connecting exible cables
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(Translation of the original operating instructions) 2522722-01-05/19
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