schmersal SRB 301AN User manual

SRB 301AN
Operating instructions
Safety-monitoring 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".
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.
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 Classication ..........................................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..........................................3
5.2 Description of the terminals ...............................3
5.3 Notes ................................................3
6 Set-up and maintenance
6.1 Functional testing.......................................4
6.2 Maintenance ..........................................4
7 Disassembly and disposal
7.1 Disassembly...........................................4
7.2 Disposal ..............................................4
8 Appendix
8.1 Wiring examples .......................................4
8.2 Start conguration (with edge detection) .....................4
8.3 Sensor conguration ....................................5
8.4 Actuator conguration ...................................5
9 EU Declaration of conformity
x.000 / 03.2019 / v.A. - 101166039-EN / G / 2019-08-15 / AE-Nr.10774
EN Operating instructions. . . . . . . . . . . . .pages 1 to 6
Original

2
Operating instructions
Safety-monitoring module SRB 301AN
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 safety-monitoring module, personal hazards or dama-
ge 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:
SRB 301AN
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 or magnetic
safety sensors for safety functions on sliding, hinged and removable
safety guards as well as emergency stop control devices and AOPDs.
The safety function is defined as the opening of the enabling circuits
13-14, 23-24 and 33-34 when the input S21-S22 is opened and/or when
the input S13-S14 is closed.
The safety-relevant current paths with the outputs contacts 13-14,
23-24 and 33-34 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
- SIL 3 to IEC 61508-2
- SILCL 3 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 DIN rail to EN 60715
Terminal designations: IEC 60947-1
Material of the housings: Plastic, glass-fibre reinforced
thermoplastic, ventilated
Material of the contacts: AgSnO, self-cleaning, positive drive
Weight: 230 g
Start conditions: Automatic or start button
Feedback circuit (Y/N): Yes
Pull-in delay for automatic start: typ. 170 ms
Pull-in delay with reset button: typ. 25 ms
Drop-out delay in case of emergency stop: typ. 15 ms, max. 23 ms
Bridging in case of voltage drops: typ. 15 ms
Mechanical data:
Connection type: Screw connection
Cable section: min. 0,25 mm² / max. 2,5 mm²
Connecting cable: rigid or flexible
Tightening torque for the terminals: 0.6 Nm
With removable terminals (Y/N): No
Mechanical life: 10 million operations
Electrical life: Derating curve available on request
Resistance to shock: 10 g / 11 ms
Resistance to vibration in 10 to 150 Hz,
accordance with EN 60068-2-6: Amplitude 0.35 mm
Ambient conditions:
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: max. 2.1 W / 3.5 VA
Rated operating voltage Ue: 24 VDC –10%/+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 > 500 mA, reset after approx. 1 sec.
Monitored inputs:
Cross-wire detection (Y/N): Yes
Wire breakage detection (Y/N): Yes
Earth leakage detection (Y/N): Yes
Number of NO contacts: 1
Number of NC contacts: 1
Cable length: 1,500 m with1.5 mm²
2,500 m with2.5 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: 13-14, 23-24, 33-34:
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 IEC 60947-5-1
Safety fuse 8 A quick blow, 6 A slow blow

3
SRB 301AN
Operating instructions
Safety-monitoring module
EN
Fuse rating of the signalling output: Y1: 500 mA (internal
electronic trip)
Utilisation category to IEC 60947-5-1: AC-15: 230 V / 6 A,
DC-13: 24 V / 6 A
Dimensions (H x W x D): 100 x 22.5 x 121 mm
The data specified in this manual are applicable when the component is
operated with rated operating voltage Ue±0%.
Use copper conductors only.
Use 60°C/75°C conductors.
Use 60/75°C wire only.
Use No. 28-12 AWG wire size only.
Tightening torque: 5 lb in.
2.5 Classification
Standards: ISO 13849-1, IEC 61508
PL: e
Control Category: 4
DC: 99% (high)
CCF: > 65 points
PFH: ≤ 2.00 × 10-8/h
SIL: suitable for SIL 3 applications
Mission time: 20 years
The PFH value of 2.00 × 10-8/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
3. Mounting
3.1 General mounting instructions
Mounting: snaps onto standard DIN rails to EN 60715.
Snap the bottom of the enclosure slightly tilted forwards in the DIN rail
and push up until it latches in position.
3.2 Dimensions
All measurements in mm.
Device dimensions (H/W/D): 100 x 22.5 x 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.
Wiring examples: see appendix
5. Operating principle and settings
5.1 LED functions
• K1: Status channel 1
• K2: Status channel 2
• 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
Voltages: A1
A2
+24 VDC/24 VAC
0 VDC/0 VAC
Inputs: S13 - S14
S21 - S22
Input channel 1
Input channel 2
Outputs: 13 - 14
23 - 24
33 - 34
Y1
First safety enabling circuit
Second safety enabling circuit
Third safety enabling circuit
Signalling output
Start: X1 - X2
X1 - X3
Feedback circuit and external reset
(monitored)
Automatic start
K1
Ui
K2
SRB
301AN
13 23 33 Y1
A1 X1 X2 X3
14 24 34 S13
A2 S21 S22 S14
Fig. 1
5.3 Notes
Signalling outputs must not be used in safety circuits.
Due to the operating principle of the electronic fuse,
the customer must check that no hazard is caused by
an unexpected restart in circuits without reset button
(automatic reset).

4
Operating instructions
Safety-monitoring module SRB 301AN
EN
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
The device has to be integrated into the periodic check-ups
according to the Ordinance on Industrial Safety and Health,
however at least 1x/year.
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
position switches where one has a positive break contact; with
external reset button
J
(Fig. 2)
• Relay outputs: Suitable for 2-channel control, for increase in capacity
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.
•
S
= Feedback circuit
J
S
L1
A1 S21 S22 S13 S14 X1 X2 X3 13 23 33
Y124 3414A2
N
K2
K1
Ui
F1
K1
K2
a)
KAK
B
K
B
KA
KA
K
B
Fig. 2
a) Logic
8.2 Start configuration (with edge detection)
External reset button (Fig. 3)
• The external reset button is integrated in the feedback circuit in series.
• The safety-monitoring module is activated upon actuation of the reset
button.
Automatic start (Fig. 4)
• The automatic start is programmed by connecting the feedback circuit
to the terminals X1-X3. 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!
• When the SRB 301AN safety-monitoring module is used with the
operating mode "Automatic start", an automatic restart after a
shutdown in case of emergency must be prevented by the upstream
control to EN 60204-1 paragraph 9.2.5.4.2.
Due to the operating principle of the electronic fuse, the
customer must check that no hazard is caused by an
unexpected restart in circuits without reset button (automatic
reset).
KA
J
S
KB
X2
X1
X3
X1
KA
KB
Fig. 3 Fig. 4

5
SRB 301AN
Operating instructions
Safety-monitoring module
EN
8.3 Sensor configuration
Dual-channel emergency stop circuit with command devices to
ISO 13850 (EN 418) and IEC 60947-5-5 (Fig. 5)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• Category 4 – PL e to ISO 13849-1 possible.
Dual-channel guard door monitoring circuit with interlocking
device to ISO 14119 (Fig. 6)
• 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.
• Category 4 – PL e to ISO 13849-1 possible.
Dual-channel control of magnetic safety switches to IEC 60947-5-3
(see Fig. 7)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the monitoring circuits are detected.
• Category 4 – PL e to ISO 13849-1 possible.
S22
S21
S14
S13
S22
S21
S14
S13
S22 S14
S21 S13
Fig. 5 Fig. 6 Fig. 7
The connection of magnetic safety switches to the SRB
301AN 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 meet the
requirements:
– BNS 33-11Z, BNS 33-11ZG
– BNS 250-11Z, BNS 250-11ZG
– BNS 120-11Z
– BNS 180-11Z
– BNS 303-11Z, BNS 303-11ZG
– BNS 260-11Z, BNS 260-11ZG
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 (see Fig. 8)
• Suitable for increase in capacity or number of contacts by means of
contactors or relays with positive-guided contacts.
• If the feedback circuit
is not required, establish a bridge.
•
S
= Feedback circuit
Dual-channel control with feedback circuit (Fig. 9)
• Suitable for increase in capacity or number of contacts by means of
contactors or relays with positive-guided contacts.
• If the feedback circuit is not required, establish a bridge.
•
S
= Feedback circuit
X1 X3 13
14
K
A
K
A
K
A
S
L1
N
X1 X3 13
14
K
B
K
A
K
B
K
A
K
B
L1
N
K
A
S
Fig. 8 Fig. 9

6EN
SRB301AN-E-EN
Operating instructions
Safety-monitoring module SRB 301AN
9. EU Declaration of conformity
The currently valid declaration of conformity can be
downloaded from the internet at www.schmersal.net.
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, August 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.
Name of the component: SRB 301AN
Description of the component: Safety-monitoring module for emergency stop circuits, guard door
monitoring and magnetic safety switches
Relevant Directives: Machinery Directive
EMC-Directive
RoHS-Directive
2006/42/EC
2014/30/EU
2011/65/EU
Applied standards: IEC 60947-5-1:2016 (in extracts),
IEC 60947-3:2013
ISO 13849-1:2015,
ISO 13849-2:2012,
Notied body for the prototype
test:
TÜV Rheinland Industrie Service GmbH
Alboinstr. 56, 12103 Berlin
ID n°: 0035
EC-prototype test certicate: 01/205/5724.00/19
Person authorised for the compilation
of the technical documentation:
Oliver Wacker
Möddinghofe 30
42279 Wuppertal