Operating instructions
Safety-monitoring module
Operating instructions. . . . . . . . . . . . .pages 1 to 8
EN
Original
SRB 202MSL
8 Appendix
8.1 Wiring examples .......................................4
8.2 Sensor conguration ....................................6
8.3 Actuator conguration ...................................6
8.4 Flow diagram ..........................................6
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. - 101181999-EN / E / 2017-11-23 / AE-Nr. 8431
5 Operating principle and settings
5.1 LED functions..........................................3
5.2 Description of the terminals ...............................3
5.3 Set-up instructions ......................................4
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
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 202MSL
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 202MSL
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 semiconductor sensors to initiate a muting function.
The safety function is defined as the opening of enabling circuits 13-14
and 23-24 when the inputs S11-S12 and/or S22-S23 are opened. The
safety-relevant current paths with the output contacts 13-14 and 23-24
meet the following requirements under observation of a B
assessment (also refer to "Requirements of DIN EN ISO 13849-1"):
– Control category 4 - PL e to DIN EN ISO 13849-1
– SIL 3 to DIN EN 61508-2
– SILCL 3 to DIN EN 62061 (meets the requirements of 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.
10D
value
2.4 Technical data
General data:
Standards: IEC/EN 60204-1, EN 60947-5-1;
EN ISO 13849-1, IEC/EN 61508, DIN EN 61496-1
Climate resistance: EN 60068-2-78
Mounting: Snaps onto standard DIN rail
to DIN EN 60715
Terminal designations: EN 60947-1
Material of the housings: Plastic, glass-fibre reinforced
thermoplastic, ventilated
Material of the contacts: AgSnO, AgNi, self-cleaning,
positive drive
Weight: 400 g
Start conditions: by external muting sensors
Feedback circuit (Y/N): yes
Pull-in delay: typ. 200 ms
Drop-out delay in case of emergency stop: typ. 20 ms
Drop-out delay on "supply failure": typ. 60 ms
Time difference muting sensors: typ. 2.5 sec
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): yes
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. 5.6 W plus signalling outputs and
muting indicators
Rated operating voltage Ue: 24 VDC –15% / +20%,
residual ripple max. 10%
Fuse rating for the operating voltage: F1: Internal electronic trip,
tripping current > 1.25 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: 0
Number of NC contacts: 2
Cable length: 1,500 m mit 1.5 mm²
2,500 m mit 2.5 mm²
Conduction resistance: max. 40 Ω
Current and voltage at: S11-S12: 23 VDC / 60 mA
S22-S23: 0 VDC / 60 mA
Outputs:
Number of safety contacts: 2
Number of auxiliary contacts: 0
Number of signalling outputs: 3
Switching capacity of the safety contacts: 13-14 / 23-24:
24 VDC, 4 A ohmic (inductive in
case of appropriate protective wiring);
DC-13: 24 VDC / 2 A
Fuse rating of the safety contacts: 4 A slow blow
Switching capacity of the signalling outputs: L54 / L84: max. 50 mA
Muting indicators LA1 / LA2:
24 V / max. 0.5 A; min. 150 mA
2
EN
Operating instructions
MT
Bdxxhs/h3600
Safety-monitoring module
SRB 202MSL
Fuse rating of the signalling outputs: LA1 / LA2, F2, F3 = T 0.5 A
Utilisation category to IEC/EN 60947-5-1: DC-13:
EN 60947-5-1
Dimensions (H/W/D): 100 mm x 45 mm x 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: EN ISO 13849-1, IEC 61508,
EN 60947-5-1, DIN EN 61496-1
PL: up to e
Control category: up to 4
DC: Stop 0: 99% (high)
CCF: > 65 points
SIL: 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)
5. Operating principle and settings
5.1 LED functions
K1: Status reset
K2: Status channel 1
K3: Status channel 2
K4: Status monitoring channel 1
K5: Status monitoring channel 2
LA: Status LA1-LA2
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
Voltages: A1
A2
Inputs: S11-S12
S12-S13
S21-S22
X1-MR
Outputs: 13-14
23-24
X13-14
X23-24
LA1-LA2
24 VDC
0 VDC
Input channel S1-S3 (+)
Input channel S1-S3 (–)
Input channel S2-S4 (+)
Master reset
First safety enabling circuit (stop 0)
Second safety enabling circuit (STOP 0)
Bridging first enabling circuit
Bridging second enabling circuit
Muting lamp
Start: X1-X2 Feedback circuit
Signalling
outputs:
L54
L84
Signalling output
Signalling output
(Specifications can vary depending on the application-specific
parameters hop, dop and t
as well as the load.)
cycle
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 45 x 121 mm
with plugged-in terminals: 120 × 45 × 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
A1 X1 X2 MR
U
B
U
i
K1
K2
K3
K4
K5
LA
X23 L84 X13 24
S11 S12 S13
SRB 202MSL
S22S21 S23
LA1 13 23 L54
L84: 0,24 A
LA2 14 A2
Fig. 1
EN
3
Operating instructions
U
U
K1
K3
K4
LA
S11
S12
S1
X2
X13
24
214A2
S
L
A
J
Safety-monitoring module
SRB 202MSL
5.3 Set-up instructions
According to DIN EN 61496-1 (paragraph A.7.2.2), a failure of the
signal light must cause a bridged condition to be avoided. The
signalling output L84 is used to avoid that the immediate activation of
the emergency stop function of the SRB 202MSL in case of failure of
only one of both muting lamps, so that the operator has the opportunity
to exchange the defective lamp in due time. This function increases
the availability of the system and prevents the shutdown of a relatively
expensive plant due to a simple lamp failure. To set this signalling
output, the following steps must be executed:
• Prior to switching the supply voltage (24 VDC) on, check the proper
connection of the SRB 202MSL and connect a muting lamp to the
outputs LA1 and LA2 (min. 150 mA, max. 500 mA).
• The enclosure must be opened to set the signalling output L84. To
open the front cover, insert a slotted screwdriver in the top and bottom
cover notch and gently lift it (Fig. 2). 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.
• Bring the SRB 202MSL in muting condition (actuate the sensors S1
and S2 within the timeframe).
• Check if the muting lamp is on.
• Connect a voltmeter to output L84 and the 0V potential and turn
the lamp trimmer R1 (Fig. 3) until the signal condition of output L84
changes from 0V to 24V.
• Remove the muting lamp at the outputs LA1 and LA2. The signal
condition of output L84 changes to 0V. Reconnect the muting lamp.
• The set lamp current must be entered on the front cover.
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.
7. Disassembly and disposal
7.1 Disassembly
The safety-monitoring module must be disassembled in a de-energised
condition only.
7.2 Disposal
The safety-monitoring module must be disposed of in an appropriate
manner in accordance with the national prescriptions and legislations.
A1 X1 X2 MR
M
LA
3
L54
LA1 13 23 L54
3
S11 S12 S13
U
B
U
i
K1
SRB 202MSL
RB 202MSL
K2
K3
K4
L84: 0,24 A
84: 0,24
K5
LA
3
S22S21 S23
3 L84
X23 L84 X13 24
LA
LA2 14 A2
Fig. 2 Fig. 3
8. Appendix
8.1 Wiring examples
Dual-channel control, shown for 2 muting sensors and an external
master reset button J (Fig. 4)
• Relay outputs: Suitable for 2-channel control, for increase in capacity
or number of contacts by means of contactors or relays with positiveguided contacts.
R1
• The control system recognises wire-breakage and earth faults in the
monitoring circuit.
• Cross-wire shorts between the monitoring circuits are detected.
• Electronic fuse F1: 1.25 A
• S = Feedback circuit
L
23
X23
K
A
K
B
K
K
A
B
N
Master-
K
S1
S3
B
S
J
A1
F1
K
A
S11
+–+–
A2
S2 S4
S12 S13 S21 S22 S23 L84MR X1 X2
a)
K4K1 K2 K3
K5
L54 LA1 LA2 X13
F2
F3
K1
K2
K3
K4
K5
141324
Fig. 4:
b) Logic and lamp monitoring
4
EN
Operating instructions
b)
b)
b)
b)
Safety-monitoring module
SRB 202MSL
Wiring examples AOPD* with relay outputs and muting sensors
with potential-free contacts
* Active Optoelectronic Protective Device, e.g. safety light grids etc.,
formerly also known as ESD (= electro-sensitive safety device)
a)
S1 S3 S2 S4
S12
S11
U
B
U
i
K1
SRB 202MSL
K2
K3
K4
K5
LA
X1
L84: ……. A
X2
S22
LA1
S23
LA2
+24 V
X13
K1
K2
K3
141324
X23
23
c)
d)
Fig. 5
a) Muting sensors,
b) Bridge;
c) AOPD (relay outputs);
d) Elan safety relay
a)
+24 V
S13 S21
S12S11
U
B
U
i
K1
SRB 202MSL
K2
K3
K4
L84: ……. A
K5
LA
X1
X2
Fig. 7
a) Semi-conductor muting sensors,
b) Bridge;
c) AOPD (relay outputs);
d) Elan safety relay
S22
LA1
S23
LA2
X13
23
K1
K2
K3
141324
a)
+24 V
X23
c)
d)
a)
+24 V
S1 S3 S2 S4
S12
S11
U
B
U
i
K1
SRB 202MSL
K2
K3
K4
K5
LA
Fig. 6
a) Muting sensors,
b) Bridge;
c) AOPD (semi-conductor outputs);
d) Elan safety relay
X1
L84: ……. A
X2
S22
X13
S23
LA1
LA2
23
K1
K2
K3
141324
X23
S13 S21
S12S11
U
B
U
i
K1
SRB 202MSL
K2
K3
K4
L84: ……. A
K5
LA
X1
X2
S22
LA1
S23
LA2
X13
X23
23
K1
K2
K3
c)
141324
c)
d)
d)
Fig. 8
a) Semi-conductor muting sensors,
b) Bridge;
c) AOPD (semi-conductor outputs);
d) Elan safety relay
EN
5
Operating instructions
S1
A
J
Mast
L1
f)
e)
d
c)
b)
a)
Safety-monitoring module
SRB 202MSL
8.2 Sensor configuration
Dual-channel muting circuit (Fig. 9)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the muting sensors are detected.
• With external reset button
• The reset button is integrated in the feedback circuit in series.
• If the reset button is not required, establish a bridge.
• Category 4 – PL e to DIN EN ISO 13849-1 possible.
Master reset (Fig. 10)
• The master reset pushbutton must be connected to terminal X1-MR.
• The master reset enables resetting a locked safety-monitoring
module. The input MR reacts on a rising edge.
S11
S22
X1
S2
K
K
B
S12
S23
X2
Fig. 9 Fig. 10
8.3 Actuator configuration
Dual-channel control with feedback circuit (Fig. 11)
• 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
er-
J
MR
8.4 Flow diagram
see Fig. 12
1
0
1
0
1
0
1
)
0
1
0
t
S
Fig. 12
a) Bypass switch S1;
b) Bypass switch S2;
c) Simultaneity indication L54;
d) Signalling output L84 (lamp current);
e) Lamp current LA1-LA2;
f) Output contacts 13-14 / 23-24 potential-free;
g) uninterrupted workcycle;
h) Synchronous actuation fault ts > 2.5 s
i) Muting indicator defective
t
S
K
K
S
A
B
X1 X2 13 23
2414
K
K
N
Fig. 11
B
A
6
EN
Operating instructions
Safety-monitoring module
9. EU Declaration of conformity
EU Declaration of conformity
SRB 202MSL
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: SRB202MSL
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,
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
2006/42/EC
2014/30/EU
2011/65/EU
Notied body, which approved
the full quality assurance system, referred to in Appendix X,
2006/42/EC:
Person authorised for the compilation
of the technical documentation:
Place and date of issue: Wuppertal, November 22, 2017
SRB202MSL-C-EN
TÜV Rheinland Industrie Service GmbH
Alboinstr. 56, 12103 Berlin
ID n°: 0035
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.
EN
7
K. A. Schmersal GmbH & Co. KG
Möddinghofe 30, D - 42279 Wuppertal
Postfach 24 02 63, D - 42232 Wuppertal
Phone: +49 - (0)2 02 - 64 74 - 0
Telefax: +49 - (0)2 02 - 64 74 - 1 00
E-Mail: info@schmersal.com
Internet: http://www.schmersal.com
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