schmersal SRB211ST V.2 User manual

SRB211ST V.2 /CC V.2 /PC V.2
Operating instructions
Safety relay module
EN 1
1. About this document
1.1 Function
This operating instructions manual provides all the information you
need for the mounting, set-up and commissioning to ensure the safe
operation and disassembly of the safety-monitoring module. The
operating instructions must be available in a legible condition and a
complete version in the vicinity of the device.
1.2 Target group: authorised qualified personnel
All operations described in this operating instructions manual must
be carried out by trained specialist personnel, authorised by the plant
operator only.
Please make sure that you have read and understood these operating
instructions and that you know all applicable legislations regarding
occupational safety and accident prevention prior to installation and
putting the component into operation.
The machine builder must carefully select the harmonised standards
to be complied with as well as other technical specifications for the
selection, mounting and integration of the components.
1.3 Explanation of the symbols used
Information, hint, note:
This symbol is used for identifying useful additional
information.
Caution: Failure to comply with this warning notice could
lead to failures or malfunctions.
Warning: Failure to comply with this warning notice could
lead to physical injury and/or damage to the machine.
1.4 Appropriate use
The products described in these operating instructions are developed
to execute safety-related functions as part of an entire plant or machine.
It is the responsibility of the manufacturer of a machine or plant to
ensure the correct functionality of the entire machine or plant.
The safety-monitoring module must be exclusively used in accordance
with the versions listed below or for the applications authorised by the
manufacturer. Detailed information regarding the range of applications
can be found in the chapter "Product description".
1.5 General safety instructions
The user must observe the safety instructions in this operating
instructions manual, the country specific installation standards as well
as all prevailing safety regulations and accident prevention rules.
Further technical information can be found in the Schmersal
catalogues or in the online catalogue on the Internet:
www.schmersal.net.
The information contained in this operating instructions manual is
provided without liability and is subject to technical modifications.
Content
1 About this document
1.1 Function ..............................................1
1.2 Target group: authorised qualied personnel..................1
1.3 Explanation of the symbols used ...........................1
1.4 Appropriate use ........................................1
1.5 General safety instructions ...............................1
1.6 Warning about misuse ...................................2
1.7 Exclusion of liability .....................................2
2 Product description
2.1 Ordering code .........................................2
2.2 Special versions........................................2
2.3 Purpose ..............................................2
2.4 Technical data .........................................2
2.5 Safety classication .....................................3
2.6 Derating curve .........................................3
3 Mounting
3.1 General mounting instructions .............................3
3.2 Dimensions ...........................................3
4 Electrical connection
4.1 General information for electrical connection..................3
5 Operating principle and settings
5.1 LED functions..........................................4
5.2 Description of the terminals ...............................4
5.3 Notes ................................................5
5.4 Setting report ..........................................5
6 Set-up and maintenance
6.1 Functional testing.......................................5
6.2 Maintenance ..........................................5
7 Disassembly and disposal
7.1 Disassembly...........................................5
7.2 Disposal ..............................................5
8 Appendix
8.1 Wiring examples .......................................5
8.2 Start conguration ......................................6
8.3 Sensor conguration ....................................6
8.4 Actuator conguration ...................................7
9 EU Declaration of conformity
x.000 / 01.2020 / v.A. - 103002360-EN / D / 2020-01-10 / AE-Nr. 11852
EN Operating instructions. . . . . . . . . . . . .pages 1 to 8
Original

2
Operating instructions
Safety relay module SRB211ST V.2 /CC V.2 /PC V.2
EN
There are no residual risks, provided that the safety instructions as well
as the instructions regarding mounting, commissioning, operation and
maintenance are observed.
1.6 Warning about misuse
In case of inadequate or improper use or manipulations of
the component, personal hazards or damage to machinery
or plant components cannot be excluded. The relevant
requirements of the standards ISO 14119 and ISO 13850
must be observed.
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual. The manufacturer shall accept no liability for damages
resulting from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary
repairs, conversions and modifications to the device are strictly
forbidden; the manufacturer shall accept no liability for damages
resulting from such invasive work, arbitrary repairs, conversions and/or
modifications to the device.
The safety-monitoring module must only be used when the enclosure is
closed, i.e. with the front cover fitted.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SRB211ST
➀
V.2
No. Option Description
➀
plug-in screw terminals 0.25…2.5 mm²
/CC plug-in cage clamps 0.25 … 1.5 mm²
/PC Screw terminals 0.25…2.5 mm²
Only if the information described in this operating instructions
manual are realised correctly, the safety function and
therefore the compliance with the Machinery Directive is
maintained.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond
to the standard version.
2.3 Purpose
The safety-monitoring modules for integration in safety circuits are
designed for fitting in control cabinets. They are used for the safe
evaluation of the signals of positive break position switches for safety
functions or magnetic safety sensors on sliding, hinged and removable
safety guards as well as emergency stop control devices and AOPDs
(safety light barriers).
The safety function is defined as the opening of the enabling circuits
13-14 and 23-24 and the delayed opening of the enabling circuits
37-38 when the inputs S11-S12 and/or S21-S22 are opened. The
safety-relevant current paths with the outputs contacts 13-14 and 23-24
meet the following requirements under observation of a PFH value
assessment (also refer to chapter 2.5 "Safety classification"):
– Control category 4 – PL e to ISO 13849-1
– Corresponds to SIL 3 to IEC 61508
– SILCL 3 to IEC 62061
The safety-relevant current paths with the outputs contacts 37-38
meet the following requirements under observation of a PFH value
assessment (also refer to chapter 2.5 "Safety classification"):
– Control category 3 - PL d to ISO 13849-1
– SIL 2 to IEC 61508
– SILCL 2 to IEC 62061
To determine the Performance Level (PL) to ISO 13849-1 of the entire
safety function (e.g. sensor, logic, actuator), an assessment of all
relevant components is required.
The entire concept of the control system, in which the safety
component is integrated, must be validated to the relevant
standards.
2.4 Technical data
General data:
Standards: EN 60204-1, IEC 60947-5-1, ISO 13849-1, IEC 61508
Climate resistance: EN 60068-2-78
Mounting: snaps onto standard rail to EN 60715
Terminal designations: IEC 60947-1
Material of the housings: Plastic, glass-fibre reinforced thermoplastic,
ventilated
Material of the contacts: AgSnO, AgNi, self-cleaning, positive drive
Weight: 230 g
Start conditions: Automatic or start button (monitored)
Feedback circuit available: yes
Pull-in delay for automatic start: typ. 120 ms, max. 130 ms
Pull-in delay with reset button: typ. 10 ms, max. 15 ms
Drop-out delay in case of emergency stop: typ. 15 ms, max. 20 ms
(13-14, 23-24)
Drop-out delay on "supply failure": ≤ 55 ms
Mechanical data:
Connection type: refer to 2.1 Ordering code
Cable section: refer to 2.1 Ordering code
Connecting cable: rigid or flexible
Tightening torque for the terminals: 0.6 Nm
With removable terminals: see 2.1 Ordering code
Mechanical life: 10 million operations
Resistance to shock: 10 g / 11 ms
Resistance to vibration in accordance with EN 60068-2-6: 10 to 150 Hz,
Amplitude 0.35 mm
Ambient temperature: – 25 °C … +60 °C
Storage and transport temperature: –40 °C … +85 °C
Protection class: Enclosure: IP40
Terminals: IP20
Clearance: IP54
Air clearances and creepage distances to IEC 60664-1: 4 kV/2 (basic
insulation)
EMC rating: to EMC Directive
Electrical data:
Contact resistance in new state: max. 100 mΩ
Power consumption: 2.4 W / 5.9 VA, plus signalling output
Rated operating voltage Ue:24 VDC: –15% / +20%,
residual ripple max. 10%,
24 VAC: –15% / +10%
Frequency range: 50 / 60 Hz
Fuse rating for the operating voltage: Internal electronic trip,
tripping current F1: > 750 mA;
tripping current F2: > 75 mA;
Reset after disconnection of supply voltage;
tripping current F3: > 140 mA
Current and voltage at the control circuits:
- S11, S12, S21, S22: 24 VDC, 10 mA
- X1, X2: 24 VDC, start impulse, 25 mA / 25 ms
- X1, X3: 24 VDC, start impulse, 950 mA / 10 ms

3
SRB211ST V.2 /CC V.2 /PC V.2
Operating instructions
Safety relay module
EN
Monitored inputs:
Cross-wire detection: optional
Wire breakage detection: yes
Earth connection detection: yes
Number of NO contacts: 0
Number of NC contacts: 2
Cable length: 1,500 m with 1.5 mm²
2,500 m with 2.5 mm²
Conduction resistance: max. 40 Ω
Outputs:
Number of safety contacts: 3
Number of auxiliary contacts: 0
Number of signalling outputs: 1
Switching capacity of the safety contacts
(please observe derating curve Section 2.6):
– 13-14, 23-24 (STOP 0): max. 250 VAC, 8 A ohmic
(inductive in case of appropriate protective wiring); min. 5 V / 5 mA,
– 37-38 (STOP 1): max. 250 V, 6 A ohmic
(inductive in case of appropriate protective wiring); min. 10 V / 10 mA
Switching capacity of the signalling outputs: Y1: 24 VDC / 100 mA
Fuse rating of the safety contacts: external (Ik= 1000 A)
to EN 60947-5-1
- 13-14, 23-24 (STOP 0): Safety fuse 10 A quick blow, 8 A slow blow
- 37-38 (STOP 1): Safety fuse 8 A quick blow, 6.3 A slow blow
Fuse rating of the signalling output: Y1: 100 mA (internal electronic trip F4)
Utilisation category to EN 60947-5-1:
- 13-14, 23-24, (STOP 0): AC-15: 230 VAC / 6 A, DC-13: 24 VDC / 5 A;
- 37-38, (STOP 1): AC-15: 230 VAC / 3 A, DC-13: 24 VDC / 2 A
Dimensions H x W x D: SRB211ST/PC V.2: 100 × 22.5 × 121 mm
SRB211ST V.2:120 × 22.5 × 121 mm
SRB211ST/CC V.2: 130 × 22.5 × 121 mm
The data specified in this manual are applicable when the component is
operated with rated operating voltage Ue±0%.
2.5 Safety classification
Standards: ISO 13849-1, IEC 61508
PL: STOP 0: up to e, STOP 1: up to d
Category: STOP 0: up to 4, STOP 1: up to 3
PFH value: STOP 0: ≤ 2.0 x 10-8/h,
STOP 1: ≤ 2.0 x 10-7/h
DC: STOP 0: 99% (high),
STOP 1: > 60% (low)
CCF: > 65 points
SIL: STOP 0: up to 3, STOP 1: up to 2
Mission time: 20 years
The PFH values of 2.0 x 10-8/h and 2.0 × 10-7/h applies to the
combinations of contact load (current through enabling contacts) and
number of switching cycles (nop/y) mentioned in the table below. At 365
operating days per year and a 24-hours operation, this results in the
below-mentioned switching cycle times (tcycle) for the relay contacts.
Diverging applications upon request.
Contact load nop/y tcycle
20 % 525,600 1.0 min
40 % 210,240 2.5 min
60 % 75,087 7.0 min
80 % 30,918 17.0 min
100 % 12,223 43.0 min
2.6 Derating curve
21 A
18 A
15 A
12 A
9 A
6 A
3 A
0 A
35 C 40 C 45 C 50 C 55 C 60 C 65 C
Fig. 1:
vertical = residual current;
horizontal = ambient temperature;
continuous line: operating voltage/thermal test current DC;
dashed line: operating voltage/thermal test current AC.
Mounting distance to other safety-relay modules as of a residual current
> 6 A: at least 10 mm
Derating curve depending on the rated operating voltage Ueof the SRB
safety-monitoring module.
3. Mounting
3.1 General mounting instructions
Mounting: snaps onto standard rails to EN 60715.
Snap the bottom of the enclosure slightly tilted forwards in the standard
rail and push up until it latches in position.
3.2 Dimensions
Device dimensions (H/W/D):
SRB211ST/PC V.2: 100 × 22.5 × 121 mm
SRB211ST V.2: 120 × 22.5 × 121 mm
SRB211ST/CC V.2: 130 × 22.5 × 121 mm
4. Electrical connection
4.1 General information for electrical connection
As far as the electrical safety is concerned, the protection
against unintentional contact of the connected and therefore
electrically interconnected apparatus and the insulation of the
feed cables must be designed for the highest voltage, which
can occur in the device.
The electrical connection may only be carried out by
authorised personnel in a de-energised condition.
To avoid EMC disturbances, the physical ambient and
operational conditions at the place where the product
is installed, must meet the provisions laid down in the
paragraph "Electromagnetic Compatibility (EMC)" of
EN 60204-1.
Wiring examples: see appendix

4
Operating instructions
Safety relay module SRB211ST V.2 /CC V.2 /PC V.2
EN
5. Operating principle and settings
5.1 LED functions
• K1: Status channel 1
• K2: Status channel 2
• K3: Status delayed enabling circuit channel 1
• K4: Status delayed enabling circuit channel 2
• UB: Status operating voltage (LED is on, when the operating voltage
on the terminals A1-A2 is ON)
• Ui: Status internal operating voltage (LED is on, when the operating
voltage on the terminals A1-A2 is ON and the fuse has not been
triggered).
5.2 Description of the terminals
(see Fig. 2)
Voltages: A1
A2
+24 VDC/24 VAC
0 VDC/0 VAC
Inputs: S11-S12
S21-S22
S21-S22
Input channel 1 (+)
Input channel 2 (+)
(without cross-wire short detection)
Input channel 2 (–)
(with cross-wire short detection)
Outputs: 13-14
23-24
37-38
First safety enabling circuit (stop 0)
Second safety enabling circuit (STOP 0)
Third safety enabling circuit (stop 1)
Start: X1-X2
X1-X3
Y1
Feedback circuit and external reset (monitored)
Automatic start
Signalling output
Opening the front cover (see Fig. 3)
• To open the front cover, insert a slotted screwdriver in the top and
bottom cover notch and gently lift it.
• When the front cover is open, the electrostatic discharge requirements
must be respected and observed.
• After setting, the front cover must be fitted back in position.
• The set drop-out delay must be entered on the front cover.
Only touch the components after electrical discharge!
37 23 13 Y1
X1
X3 S22 S21 A2
38 24 14 X2
S12 S11 A1
PROTECT
SRB
211ST
UB
Ui
K1
K2
K3
K4
t =
s
V.2
37 23 13 Y1
X1
X3 S22 S21 A2
38 24 14 X2
S12 S11 A1
PROTECT
SRB
211ST
UB
Ui
K1
K2
K3
K4
t =
s
V.2
37
23
1
3
Y1
X1
X3
S22
S21
A2
38
2
4
14
X2
S12
S11
A1
PR
O
TE
C
T
S
R
B
2
1
1
S
T
U
B
U
i
K1
K2
K3
K4
t
=
s
V
.
V
V
2
Fig. 2 Fig. 3
Time setting (see Fig. 4 and 5)
DIP switch settings:
• The DIP switches are located underneath the front cover of
the safety-relay module (see Fig. 4 and 5).
• Both DIP switches SW 1 (channel 1) and SW 2 (channel 2)
must be set identically.
• The DIP switches can be set when the operating voltage is
on; however, in order for the setting to be saved in the SRB
211ST, the voltage supply must be interrupted for approx. 3
seconds.
• The set drop-out delay must be checked and entered on the
front cover and in the settings report.
S1 SW1 AF2
QS nQS
ON
12
34
ON
12
34
Fig. 4
New adjustable drop-out delays and cross-wire short
monitoring for version V.2! See Fig. 5. Tolerance ± 2%
DIP switch
setting
Drop-out delay DIP switch
setting
Drop-out delay
ON
1234
<0,1 s
ON
1234
5.0 s
ON
1234
0.5 s
ON
1234
8.5 s
ON
1234
1.0 s
ON
1234
10.0 s
ON
1234
1.5 s
ON
1234
12.0 s
ON
1234
2.0 s
ON
1234
15.0 s
ON
1234
2.5 s
ON
1234
20.0 s
ON
1234
3.0 s
ON
1234
25.0 s
ON
1234
4.0 s
ON
1234
30.0 s
Fig. 5
Setting the switch (see Fig. 4)
• The cross-wire short monitoring function (factory setting) is
programmed by means of switch S1 underneath the front cover of the
safety-relay module.
The switch must only be operated in de-energised condition
by means of a finger or an insulated blunt tool.
Resetting the hybrid fuse
• The hybrid fuse of the safety-relay module can be reset by switching
the operating voltage off and back on.

5
SRB211ST V.2 /CC V.2 /PC V.2
Operating instructions
Safety relay module
EN
5.3 Notes
Delayed enabling circuits (see Fig. 6)
• The drop-out delay of the safety enabling circuits 37-38 can be set
within the range of 0...30 seconds by means of DIP switches.
The DIP switches are located underneath the front cover of the safety-
relay module.
• The safety enabling circuit 37-38 meets STOP category 1 to EN 60204-1.
• The drop-out delays of the safety enabling circuits STOP 1 can be
reduced in case of a failure.
Signalling output Y1 (see Fig. 7)
• The safety relays K1, K2 are signalled through signalling output Y1.
K1 K2 Y1
On On low (0 V)
On Off low (0 V)
Off On low (0 V)
Off Off high (+ 24 V)
38
37
Y1
F4
+ 24 V
Fig. 6 Fig. 7
5.4 Setting report
This report regarding the setting of the device must be completed
accordingly by the customer and enclosed in the technical manual of
the machine.
The setting report must be available whenever a safety check is
performed.
Company:
The safety-relay module is used in the following machine:
Machine n° Machine type SRB module no.
Set drop-out delay:
Set on (date) Signature of the responsible person
6. Set-up and maintenance
6.1 Functional testing
The safety function of the safety-monitoring module must be tested.
The following conditions must be previously checked and met:
1. Correct fixing
2. Check the integrity of the cable entry and connections
3. Check the safety-monitoring module's enclosure for damage.
4. Check the electrical function of the connected sensors and their
influence on the safety-monitoring module and the downstream
actuators
6.2 Maintenance
A regular visual inspection and functional test, including the following
steps, is recommended:
1. Check the correct fixing of the safety-monitoring module
2. Check the cable for damages
3. Check electrical function
4. Check drop-out delay
If a manual functional check is necessary to detect a possible
accumulation of faults, then this must take place during the
intervals noted as follows:
• at least every month for PL e with category 3 or category
4 (according to ISO 13849-1) or SIL 3 with HFT (hardware
fault tolerance) = 1 (according to IEC 62061);
• at least every 12 months for PL d with category 3 (according
to ISO 13849-1) or SIL 2 with HFT (hardware fault
tolerance) = 1 (according to IEC 62061).
Damaged or defective components must be replaced.
7. Disassembly and disposal
7.1 Disassembly
The safety-monitoring module must be disassembled in a de-energised
condition only.
Push up the bottom of the enclosure and hang out slightly tilted
forwards.
7.2 Disposal
The safety-monitoring module must be disposed of in an appropriate
manner in accordance with the national prescriptions and legislations.
8. Appendix
8.1 Wiring examples
Dual-channel control, shown for a guard door monitor; with two
contacts A and B, where at least one is a positive break contact;
with external reset button
J
(see Fig. 8)
• Relay outputs: 2-channel control, suitable for increase incapacity or
number of contacts by means of contactors or relays with positive-
guided contacts.
• The control system recognises wire-breakage, earth faults and cross-
wire shorts in the monitoring circuit.
A1 13 23 37S11 S21 S22 X1 X2 X3S12
24 3814Y1A2
KAKBKCKDN
KA
KB
K
C
K
D
K1
K2
K3
K4
L1
KB
KA
J
S
K4K1 K2 K3
F1*
F2**
F4*
F3*
Timer
Logic
QS nQS
UB Ui
Fig. 8:
S= Feedback circuit;
* = Electronic fuse;
** = Hybrid fuse

6
Operating instructions
Safety relay module SRB211ST V.2 /CC V.2 /PC V.2
EN
8.2 Start configuration
External reset button (with edge detection) (see Fig. 9)
• The external reset button is integrated as shown.
• The safety-relay module is activated by the reset (after release) of
the reset button (= detection of the trailing edge). Faults in the reset
button, e.g. welded contacts or manipulations which could lead to an
inadvertent restart, are detected in this configuration and will result in
an inhibition of the operation.
Automatic start (see Fig. 10)
• The automatic start is programmed by connecting the feedback circuit
to the terminals. If the feedback circuit is not required, establish a
bridge.
• Caution: Not admitted without additional measure due to the risk of
gaining access by stepping behind!
• Caution: within the meaning of EN 60204-1, paragraph 9.2.5.4.2, the
operating mode "automatic start" is only restrictedly admissible. In
particular, any inadvertent restart of the machine must be prevented
by other suitable measures.
K
B
J
S
K
A
X2
X1
K
B
S
K
A
X3
X1
Fig. 9 Fig. 10
8.3 Sensor configuration
Dual-channel control of a safety-related electronic
(microprocessor-based) guard system with p-type transistor
outputs (e.g. AOPDs) to IEC 61496 (see Fig. 11)
• Wire breakage and earth leakage in the control circuits are detected.
• The safety-monitoring module therefore is not equipped with a cross-
wire short detection here. The safety-relay module is not, therefore,
equipped with a cross-wire short detection.
• If cross-wire shorts in the control circuits are detected by the safety
guard: Control category 4 – PL e to ISO 13849-1 possible.
Single-channel emergency stop circuit with command devices to
ISO 13850 and IEC 60947-5-5 (Fig. 12)
• Wire breakage and earth le akage in the control circuits are detected.
• The function without cross-wire short monitoring is programmed by
means of the switch (switch position = nQS) underneath the front
cover.
• Control category 1 – PL c to ISO 13849-1 possible, when tested to
ISO 13849-1, paragraph 6.5.2.
Dual-channel emergency stop circuit with command devices to
ISO 13850 and IEC 60947-5-5 (Fig. 13)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are not detected.
• The function without cross-wire short monitoring is programmed by
means of the switch (switch position = nQS) underneath the front
cover.
• Control category 4 – PL e to ISO 13849-1 possible
(with protective wiring)
S12
+24V
S22
+24V
QS nQS
S12
S11
S22
S12
QS
nQS
S12
S11
S22
S21
QS
nQS
Fig. 11 Fig. 12 Fig. 13
Dual-channel emergency stop circuit with command devices to
ISO 13850 and IEC 60947-5-5 (Fig. 14)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• The cross-wire short monitoring function is programmed by means of
the switch (switch position = QS) underneath the front cover.
• Category 4 – PL e to ISO 13849-1 possible.
Single-channel guard door monitoring circuit with interlocking
devices to ISO 14119 (Fig. 15)
• At least one contact with positive break required.
• Wire breakage and earth le akage in the control circuits are detected.
• The function without cross-wire short monitoring is programmed by
means of the switch (switch position = nQS) underneath the front
cover.
• Control category 1 – PL c to ISO 13849-1 possible, when tested to
ISO 13849-1, paragraph 6.5.2.
Dual-channel guard door monitoring circuit with interlocking
device to ISO 14119 (Fig. 16)
• With at least one positive-break position switch
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are not detected.
• The function without cross-wire short monitoring is programmed by
means of the switch (switch position = nQS) underneath the front
cover.
• Control category 4 – PL e to ISO 13849-1 possible
(with protective wiring)
S12
S11
S22
S21
QS nQS
S12
S11
S22
S12
QS
nQS
S12
S11
S22
S21
QS
nQS
Fig. 14 Fig. 15 Fig. 16

7
SRB211ST V.2 /CC V.2 /PC V.2
Operating instructions
Safety relay module
EN
Dual-channel guard door monitoring circuit with interlocking
device to ISO 14119 (Fig. 17)
• With at least one positive-break position switch
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• The cross-wire short monitoring function is programmed by means of
the switch (switch position = QS) underneath the front cover.
• Category 4 – PL e to ISO 13849-1 possible.
Dual-channel control of magnetic safety switches
according to IEC 60947-5-3 (see Fig. 18)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the monitoring circuits are not detected.
• The function without cross-wire short monitoring is programmed by
means of the switch (switch position = nQS) underneath the front
cover.
• Category 3 – PL e to ISO 13849-1 possible.
S12
S11
S22
S21
QS
nQS
S12 S22
S11 S21
QS
nQS
Fig. 17 Fig. 18
Dual-channel control of magnetic safety switches
according to IEC 60947-5-3 (see Fig. 19)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the monitoring circuits are detected.
• The cross-wire short monitoring function is programmed by means of
the switch (switch position = QS) underneath the front cover.
• Category 4 – PL e to ISO 13849-1 possible.
S12 S22
S11 S21
QS
nQS
Fig. 19
The connection of magnetic safety switches to the SRB211ST
safety-monitoring module is only admitted when the
requirements of the standard IEC 60947-5-3 are observed.
As the technical data are regarded, the following minimum
requirements must be met:
– Switching capacity: min. 240 mW
– Switching voltage: min. 24 VDC
– Switching current: min. 10 mA
For example, the following safety sensors from Schmersal
meet the requirements:
– BNS 33-02z-2187, BNS 33-02zG-2187
– BNS 260-02z, BNS 260-02zG
– BNS 260-02-01z, BNS 260-02-01zG
When sensors with LED are wired in the control circuit
(protective circuit), the following rated operating voltage must
be observed and respected:
– 24 VDC with a max. tolerance of –5 %/+20 %
– 24 VAC with a max. tolerance of –5 %/+10 %
Otherwise availability problems could occur, especially in
series-wired sensors, where a voltage drop in the control circuit
is triggered by LEDs for instance.
8.4 Actuator configuration
Single-channel control with feedback circuit (Fig. 20)
• Suitable for increase in capacity or number of contacts by means of
contactors or relays with positive-guided contacts.
•
S
= feedback circuit:
If the feedback circuit is not required, establish a bridge.
Dual-channel control with feedback circuit (see Fig. 21)
• Suitable for increase in capacity or number of contacts by means of
contactors or relays with positive-guided contacts.
•
S
= feedback circuit:
If the feedback circuit is not required, establish a bridge.
X1 X3 3713
3814
KC
KAS
L1
N
KA
KC
X1 X3 3713
3814
KBKCKD
KA
KB
L1
N
KA
KD
KC
S
Fig. 20 Fig. 21
Differential control with feedback circuit (see Fig. 22)
• Suitable for increase in capacity or number of contacts by means of
contactors or relays with positive-guided contacts.
•
S
= feedback circuit:
If the feedback circuit is not required, establish a bridge.
X1 X3 3713
3814
KA
L1
N
KA
S
Regler-
freigabe
a)
Fig. 22
a) Enabling signal controller

8EN
SRB211ST-E-EN
Operating instructions
Safety relay module SRB211ST V.2 /CC V.2 /PC V.2
9. EU Declaration of conformity
Name of the component: SRB211ST-24V V.2,
SRB211ST/PC-24V V.2,
SRB211ST/CC-24V V.2
Description of the component: Safety-monitoring module for emergency stop circuits,
guard door monitoring, magnetic safety switches and
AOPD's
Relevant Directives: Machinery Directive
EMC-Directive
RoHS-Directive
2006/42/EC
2014/30/EU
2011/65/EU
Applied standards: DIN EN 60947-5-1:2018,
DIN EN ISO 13849-1:2016,
DIN EN ISO 13849-2:2013
Notied body for the prototype test: DGUV Test
Prüf- und Zertizierungsstelle
Elektrotechnik
Gustav-Heinemann-Ufer 130
50968 Köln
Kenn-Nr.: 0340
EC-prototype test certicate: ET 19044
Person authorised for the compilation
of the technical documentation:
Oliver Wacker
Möddinghofe 30
42279 Wuppertal
K.A. Schmersal GmbH & Co. KG
Möddinghofe 30, 42279 Wuppertal
Germany
Phone: [phone]
Telefax: [phone]
E-Mail: [email protected]
Internet: www.schmersal.com
Place and date of issue: Wuppertal, December 12, 2019
Authorised signature
Philip Schmersal
Managing Director
EU Declaration of conformity
Original K.A. Schmersal GmbH & Co. KG
Möddinghofe 30
42279 Wuppertal
Germany
Internet: www.schmersal.com
We hereby certify that the hereafter described components both in their basic design and construction conform
to the applicable European Directives.
The currently valid declaration of conformity can be
downloaded from the internet at www.schmersal.net.