Operating instructions...................... pages 1 to 8
Translation of the original operating instructions
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SRB 202CS / SRB 202CS/T / SRB 202CA/T /
SRB 202CA/QT / SRB 202CA / SRB 202CA/Q
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 qualied 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 specications 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 proper functionality of the entire machinery 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-specic installation standards as well as all prevailing
safety regulations and accident prevention rules.
Further technical information can be found in the Elan
catalogues or in the online catalogue on the Internet:
www.schmersal.net.
The information contained in this operating instructions manual is provided
without liability und is subject to technical modications.
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 ma-
chinery or plant components cannot be excluded. The relevant
requirements of the standard EN 1088 must be observed.
EN
1
Operating instructions
Safety-monitoring module
SRB 202CS / SRB 202CS/T / SRB 202CA/T /
SRB 202CA/QT / SRB 202CA / SRB 202CA/Q
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 modications to the device are strictly forbidden;
the manufacturer shall accept no liability for damages resulting from
such invasive work, arbitrary repairs, conversions and/or modications
to the device.
2 Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SRB 202
No. OptionDescription
➀
* with reference to switch-off level 1
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specications apply accordingly, provided that they correspond
to the standard version.
2.3 Destination and use
The safety-monitoring modules for integration in safety circuits are
designed for tting 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 AOPD’s.
The safety function is dened as the opening of enabling circuits 13-24
when the inputs S31-S32 and/or S41-S42 (S43-S44) are opened and
as the opening of enabling circuits 13-14 and 13-24 when the inputs
S12 and/or S22 are opened.The safety-relevant current paths with the
output contacts 13-14 and 13-24 meet the following requirements under
observation of a B
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
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.
➀
CSReset not monitored, optionally automatic reset*
CS/TReset monitored*
CAReset not monitored, optionally automatic reset*,
switch-off level 2 with antivalent inputs
CA/TReset monitored*, switch-off level 2 with
antivalent inputs, cross-wire short detection*
CA/QReset not monitored, optionally automatic reset*,
switch-off level 2 with antivalent inputs
CA/QTReset monitored*, switch-off level 2 with
antivalent inputs, cross-wire short detection*
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.
value assessment (also refer to “Requirements to
10d
(corresponds to control category 4 to DIN EN 954-1)
2.4 Technical data
General data
Standards:IEC/EN 60204-1, EN 60947-5-1,
EN ISO 13849-1; IEC/EN 61508
Climate resistance:EN 60068-2-78
Fixing:Snaps onto standard DIN rails to
DIN EN 60715
Terminal designations:EN 60947-1
Material of the enclosure:glass-bre reinforced thermoplastic,
ventilated
Material of the contacts:AgSnO, AgNi, self-cleaning,
positive drive
Weight:235 g
Start conditionsAutomatic or start button
(Refer to 2.1 Ordering code)
Feedback circuit (Y/N):Yes
Pull-in delay with reset button: Switch-off level 1: typ. 40 ms
Switch-off level 2: typ. 0.5 sec.
Drop-out delay in case
of emergency stop:
Mechanical data
Connection type:Screw connection
Cable section:min. 2 mm
Connecting cable:rigid or exible
Tightening torque
for the terminals:
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:
Ambient conditions
Ambient temperature:–25°C … +45°C
Storage and transport
temperature:
Protection class:Enclosure: IP 40
Air clearances and creepage
distances to IEC/EN 60664-1:
EMC rating:to EMC Directive
Electrical data
Contact resistance
in new state:
Power consumption:max. 4.4 W
Rated operating voltage U
Max. fuse rating of
the operating voltage:
Monitored inputs
Cross-wire detection (Y/N):Refer to 2.1 Ordering code
Wire breakage detection (Y/N): Yes
Earth leakage detection (Y/N): Yes
Number of NO contacts:CS, CS/T: 0 pc.
Number of NC contacts:CS, CS/T: 4 pc
Current and voltage limitation
of the control contacts:
Cable lengths:1-channel without cross-wire
Conduction resistance:max. 40 Ω
typ. 50 ms
2
/ max. 2 mm
0.6 Nm
10 ... 55 Hz, amplitude 0.35 mm
–40°C … +85°C
Terminals: IP 20
Wiring compartment: IP 54
4 kV/2 (basic insulation)
max. 100 mΩ
:24 VDC –15%/+20%,
e
residual ripple max. 10%
electronic fuse,
tripping current > 1 A;
reset after approx. 1 sec.
CA, CA/T, CA/Q, CA/QT: 1 pc.
CA, CA/T, CA/Q, CA/QT: 3 pc
S31-S32, S43-S44:
26 VDC / 100 mA26 VDC / 100 mA
short detection:
– 1,500 m = 1.5 mm²
– 2,500 m = 2.5 mm²
2-channel with or without
cross-wire short detection
2
2
EN
Operating instructions
Bd xx
s/h3600
Safety-monitoring module
SRB 202CS / SRB 202CS/T / SRB 202CA/T /
SRB 202CA/QT / SRB 202CA / SRB 202CA/Q
Outputs
Number of safety contacts:2
Number of auxiliary contacts:2
Switching capacity of the
safety contacts:
Switching capacity of
the auxiliary contacts:
Fuse rating of the
safety contacts
Recommended fuse
for the auxiliary contacts
Utilisation category to
EN 60947-5-1:
Dimensions (H/W/D):100 mm x 22.5 mm x 121 mm
The data specied in this manual is applicable when the component is
operated with rated operating voltage U
2.5 Safety classication
Standards:EN ISO 13849-1, IEC 61508,
PL:Stop 0: up to e
Control 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
MTTF
d
For an average annual demand rate of nop = 126,720 cycles
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
(Specications can vary depending on the application-specic
parameters hop, dop and t
10dopop
0,1 x n
op
(e.g. 4 × per hour = 1 × per 15 min. = 900 s)
13-14; 13-24:
max. 250 V, 6 A ohmic (inductive in
case of appropriate protective wiring)
max. residual current 6 A
31-32, 31-42:
24 VDC / 2 A
6.3 A slow blow
2 A slow blow
AC-15: DC-13: EN 60947-5-1:2007
±0%.
e
EN 60947-5-1
40%: 7,500,000
60%: 2,500,000
80%: 1,000,000
Maximum load 100%: 400,000
n
op
as well as the load.)
cycle
h
t
cycle
per year,
4 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 A
• K2: Status channel B
• K3: Status channel C
• K4: Status channel D
: Status operating voltage (LED is on, when the operating
• U
B
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)
Auxiliary NC contact, switch-off level 1
(must not be used in safety circuits)
Auxiliary NC contact, switch-off level 2
(must not be used in safety circuits)
Feedback circuit, manual start (reset button),
automatic start, switch-off level 1
Feedback circuit, manual start (reset button),
automatic start, switch-off level 2
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
with plugged-in terminals: 120 × 22.5 × 121 mm
Fig. 1
EN
24 14 13 31
S22 S12 A1
X1
UB
Ui
K1
SRB
K2
202
…*
K3
K4
S32 S42
X2 A2
S3132 42
S41
3
Operating instructions
Safety-monitoring module
SRB 202CS / SRB 202CS/T / SRB 202CA/T /
SRB 202CA/QT / SRB 202CA / SRB 202CA/Q
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 xing
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 inuence 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 xing 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.
24 VDC
L1
J
X1S31 S32S4231
F1
UB
Ui
K1K3K4K2
a)
A2
13
X2S41S22S12A1
K1
K3
K1 K2
K3 K4
K4
K2
14
K
K
B
KCK
A
42
24
32
D
N
S
K
C
K
D
K
K
C
A
K
K
B
D
Fig. 2: SRB 202CS, 202CS/T
a) Logic
Dual-channel control, shown for a emergency stop circuit;
with two contacts A and B and a guard door monitor with two
contacts C and D, where at least one is a positive break contact;
with external reset button J (related on the switch-off level 1)
(see Fig. 3)
• Relay outputs: Suitable for 2-channel control, for increase in capacity
or number of contacts by means of contactors or relays with positiveguided contacts.
• The control system of the emergency stop circuit detects wire breakage
and earth faults (cross-wire shorts in the SRB 202CA/QT and SRB
202CA/Q versions). The control system of the door monitoring circuits
detects wire breakage, earth faults and cross-wire shorts.
• S = Feedback circuit
Channel B of SRB 202CA/Q and SRB 202CA/QT: 0 V – S22
(see Fig. 4)
24 VDC
L1
J
X1S31 S32S4431
13
X2S43S22S12A1
8 Appendix
8.1 Wiring examples
Dual-channel control, shown for a emergency stop circuit;
with two contacts A and B and a guard door monitor with two
contacts C and D, where at least one is a positive break contact;
with external reset button J (related on the switch-off level 1)
(see Fig. 2)
• Relay outputs: Suitable for 2-channel control, for increase in capacity
or number of contacts by means of contactors or relays with positiveguided contacts.
• The control system recognises wire-breakage and earth faults in the
• The external reset button is wired to the terminals X1 (without edge
detection for switch-off level 1) and X2 (without edge detection for
switch-off level 2).
• The external reset button is integrated in the feedback circuit in series.
24 VDC
JJ
K
K
A
C
K
K
B
D
X1
24 VDC
K
K
X2
C
D
Fig. 5
left = switch-off level 1
right = switch-off level 2 (SRB 202CA, SRB 202CS and SRB 202CA/Q)
External reset button (Fig. 6)
• The external reset button is wired to the terminals X1 (with edge
detection for switch-off level 1) and X2 (without edge detection for
switch-off level 2).
• The external reset button is integrated in the feedback circuit in series.
* Automatic start at switch-off level 2: the reset button J must be
Fig. 6
left = switch-off level 1
right = switch-off level 2 (SRB 202CA/T, SRB 202CS/T and SRB 202CA/QT)
Automatic start (see Fig. 7)
• The automatic start is programmed by connecting the feedback
circuit to the terminals X1 (referring to the switch-off level 1) and X2
(referring to the switch-off level 2). Feedback circuits are not required
to be replaced by a bridge.
• When the 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 and 10.8.3.
* An external reset button for a manual start can be installed in
switch-off level 2.
24 VDC
24 VDC
*
K
K
A
C
K
K
B
D
X1
Fig. 7
left = switch-off level 1
right = switch-off level 2 (SRB 202CA, SRB 202CS and SRB 202CA/Q)
Translation of the original declaration of conformity
valid as of December 29, 2009
We hereby certify that the hereafter described safety components both in its basic design and
construction conforms to the applicable European Directives.
Name of the safety component:SRB 202CS / SRB 202CS/T /
Description of the safety component:Safety-monitoring module for emergency