Operating instructions
Safety-monitoring module
Operating instructions. . . . . . . . . . . . .pages 1 to 6
EN
Original
SRB 301/CL1
8 Appendix
8.1 Wiring examples .......................................4
8.2 Start conguration ......................................4
8.3 Sensor conguration ....................................4
8.4 Actuator conguration ...................................5
9 EU Declaration of conformity
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.
Content
1 About this document
1.1 Function ..............................................1
1.2 Target group: authorised qualied 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 classication .....................................3
3 Mounting
3.1 General mounting instructions .............................3
3.2 Dimensions ...........................................3
4 Rear side Electrical connection
4.1 General information for electrical connection..................3
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.
x.000 / 11.2017 / v.A. - 101171949-EN / C / 2017-11-15 / AE-Nr. 8401
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.......................................3
6.2 Maintenance ..........................................3
7 Disassembly and disposal
7.1 Disassembly...........................................4
7.2 Disposal ..............................................4
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.
The entire concept of the control system, in which the safety
component is integrated, must be validated to EN ISO 13849-2.
EN
1
Operating instructions
Safety-monitoring module
SRB 301/CL1
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 damage to
machinery or plant components cannot be excluded. The relevant
requirements of the standard EN 1088 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 301/CL1
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 on sliding, hinged and removable safety guards as well
as emergency stop control devices. They have a defined switch-off
behaviour in case of a momentary supply failure.
The safety function is defined as the opening of the enabling circuits
13-14, 23-24 and 33-34 when the inputs C1-S1 and/or D1-S2 are
opened. The safety-relevant current paths with output contacts 13-14,
23-24 and 33-34 meet the following requirements under observation of
a B
value assessment (also refer to “Requirements of
10D
DIN EN ISO 13849-1“):
– Control category 4 – PL e to DIN EN ISO 13849-1
– corresponds to SIL 3 to DIN EN 61508-2
– corresponds to SILCL 3 to DIN EN 62061
(corresponds to control category 4 to DIN EN 954-1)
To determine the Performance Level (PL) of the entire safety function
(e.g. sensor, logic, actuator) to DIN EN ISO 13849-1, an analysis of all
relevant components is required.
2.4 Technical data
General data
Standards: IEC/EN 60204-1, EN 60947-5-1,
EN ISO 13849-1; IEC 61508
Climate resistance: EN 60068-2-78
Mounting: Snaps onto standard DIN rail to EN 60715
Terminal designations: EN 60947-1
Material of the housings: Plastic, glass-fibre reinforced
thermoplastic, ventilated
Material of the contacts: AgSnO, self-cleaning, positive drive
Weight: 250 g
Start conditions: Automatic or start button
Feedback circuit (Y/N): yes
Pull-in delay for automatic start: typ. 110 ms
Pull-in delay with reset button: typ. 20 ms
Drop-out delay in case of emergency stop: typ. 30 ms
Drop-out delay on "supply failure": typ. 30 ms
Bridging in case of voltage drops: typ. 20 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): Nein
Mechanical life: 10 million operations
Electrical life: Derating curve available on request
Resistance to shock: 10 g / 11 ms
Resistance to vibrations to EN 60068-2-6: 10 ... 55 Hz,
amplitude 0.35 mm
Ambient conditions
Ambient temperature: – 25 °C … +45 °C
Storage and transport temperature: –40 °C … +85 °C
Protection class: Enclosure: IP40
Terminals: IP20
Clearance: IP54
Air clearances and creepage distances
to IEC/EN 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 W
Rated operating voltage Ue: 24 VDC –15% / +20%,
residual ripple max. 10%,
min. 10 V / 10 mA
Fuse rating for the operating voltage: electronic fuse,
Tripping current > 0.4 A;
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: 0
Number of NC contacts: 2
Cable length: –1,500 m = 1.5 mm²
–2,500 m = 2.5 mm²
2-channel with cross-wire short detection
Conduction resistance: max. 40 Ω
Outputs
Number of safety contacts: 3
Number of auxiliary contacts: 1
Number of signalling outputs: 0
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)
Switching capacity of the auxiliary contacts: 41-42: 24 VDC / 2 A
Fuse rating of the safety contacts: 6.3 A slow blow
Recommended fuse for the auxiliary contacts: 2 A slow blow
Utilisation category to IEC/EN 60947-5-1: AC-15 / DC-13:
EN 60947-5-1
Dimensions H x W x D: 100 mm x 22,5 mm x 121 mm
The data specified in this manual are applicable when the component is
operated with rated operating voltage Ue ±0%.
2
EN
Operating instructions
MT
Bdxxhs/h3600
Safety-monitoring module
SRB 301/CL1
2.5 Safety classification
Standards: EN ISO 13849-1, IEC 61508, EN 60947-5-1
PL: Stop 0: up to e
Category: Stop 0: up to 4
DC: Stop 0: 99% (high)
CCF: > 65 points
SIL: Stop 0: up to 3
Service life: 20 years
B
value (for one channel): Low voltages range 20%: 20,000,000
10D
40%: 7,500,000
60%: 2,500,000
80%: 1,000,000
Maximum load 100%: 400,000
TF
D
10Dopop
0,1 x n
n
op
op
t
cycle
For an average annual demand rate of nop = 126,720 cycles per year,
Performance Level PL e can be obtained at maximum load.
nop = average number of activations per year
dop = average number of operating days per year
hop = average number of operating hours per day
t
= average demand rate of the safety function in s
cycle
(e.g. 4 × per hour = 1 × per 15 min. = 900 s)
(Specifications can vary depending on the application-specific
parameters hop, dop and t
as well as the load.)
cycle
5.2 Description of the terminals
Voltages: C
D
Inputs: C1-S1
C1-D1
D1-S2
Outputs: 13-14
23-24
33-34
Start: X1-X2
41-42
CC123
13 S1 243341
U
B
U
SRB
i
K1
301/
CL1
K2
*
X2 S2 X13442
14 D1 D
+24 VDC/24 VAC
0 VDC/24 VAC
Input channel 1 (+)
Input channel 2 (+)
Input channel 2 (–) (with cross-wire short detection)
First safety enabling circuit
Second safety enabling circuit
Third safety enabling circuit
Feedback circuit and external reset
Auxiliary NC contact
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. Rear side Electrical connection
4.1 General information for electrical connection
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
• 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 C-D is ON and the fuse has not been
triggered)
Fig. 1
* = with printed customer-specific logo
5.3 Notes
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).
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
Damaged or defective components must be replaced.
EN
3
Operating instructions
A
J
S
S
K
Safety-monitoring module
SRB 301/CL1
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.
L1
K
S
B
J
K
A
C S1C1 D1
S2 X1 X2
13 23
41
F1
a)
Ui
K1 K2
D
K1
K2
14 243334
K
K
B
42
8.2 Start configuration
External reset button (Fig. 3)
• The external reset button is integrated as shown.
• The safety-monitoring module is activated upon actuation.
Automatic start (see Fig. 4)
• 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 IEC 60204-1 paragraph 9.2.5.4.2
and 10.8.3, the operating mode "automatic start" is only restrictedly
admissible. In particular, any inadvertent restart of the machine must
be prevented by other suitable measures.
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).
X1
K
B
K
A
X2
Fig. 3 Fig. 4
8.3 Sensor configuration
Dual-channel emergency stop circuit with command devices to
DIN EN ISO 13850 (EN 418) and EN 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 DIN EN ISO 13849-1 possible.
X1
K
B
A
X2
Fig. 2
a) Logic
= Feedback circuit
S
K
K
A
B
N
S2
C1S1D1
Fig. 5
Dual-channel guard door monitoring circuit with interlocking
device to EN 1088 (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 DIN EN ISO 13849-1 possible.
S1D1S2
C1
Fig. 6
4
EN
Operating instructions
L1
L1
L1
Safety-monitoring module
8.4 Actuator configuration
Single-channel control with feedback circuit (Fig. 7)
• 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 (Fig. 8)
• 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.
K
K
B
C
K
K
S
A
C
X1 X2 2313
S
K
K
A
D
X1 X2 2313
SRB 301/CL1
2414
K
A
N
Fig. 7 Fig. 8
Differential control with feedback circuit (see Fig. 9)
• 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.
K
S
A
K
C
N
K
A
K
BKC
2414
K
D
X1 X2 2313
2414
a)
N
Fig. 9
a) Enabling signal controller
K
A
EN
5
Operating instructions
Safety-monitoring module
9. EU Declaration of conformity
EU Declaration of conformity
SRB 301/CL1
Original K.A. Schmersal GmbH & Co. KG
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: SRB301/CL1
Description of the component: Safety-monitoring module for emergency stop circuits and
Relevant Directives: Machinery Directive
Applied standards: EN 60947-5-1:2004 + AC:2005 + A1:2009,
Notied body, which approved
the full quality assurance system,
referred to in Appendix X, 2006/42/EC:
Möddinghofe 30
42279 Wuppertal
Germany
Internet: www.schmersal.com
guard door monitoring
EMC-Directive
RoHS-Directive
EN ISO 13849-1:2015,
EN ISO 13849-2:2012
TÜV Rheinland Industrie Service GmbH
Alboinstr. 56, 12103 Berlin
ID n°: 0035
2006/42/EC
2014/30/EU
2011/65/EU
Person authorised for the compilation
of the technical documentation:
Place and date of issue: Wuppertal, November 15, 2017
SRB301_CL1-C-EN
Oliver Wacker
Möddinghofe 30
42279 Wuppertal
Authorised signature
Philip Schmersal
Managing Director
The currently valid declaration of conformity can be
downloaded from the internet at www.schmersal.net.
6
EN
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