schmersal SRB 301LC/B User manual

SRB 301LC/B
Operating instructions
Safety-monitoring module
1
EN
EN Operating instructions...................... pages 1 to 6
Translation of the original operating instructions
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 qualied 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 operat-
ing 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 specications 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 instruc-
tions manual, the country-specic 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. Subject to technical modications.
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.
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 Appropriateuse........................................1
1.5 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.6 Warningaboutmisuse...................................1
1.7 Exclusionofliability.....................................2
2 Product description
2.1 Orderingcode .........................................2
2.2 Specialversions........................................2
2.3 Destinationanduse.....................................2
2.4 Technicaldata.........................................2
2.5 Safety 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 LEDfunctions..........................................3
5.2 Descriptionoftheterminals...............................3
6 Set-up and maintenance
6.1 Functionaltesting.......................................3
6.2 Maintenance ..........................................3
7 Disassembly and disposal
7.1 Disassembly...........................................3
7.2 Disposal..............................................3
8 Appendix
8.1 Wiringexamples .......................................4
8.2 Start conguration ......................................4
8.3 Sensor conguration ....................................4
8.4 Actuator conguration ...................................5
8.5 ECDeclarationofconformity..............................6
02.12.2009 / Index: 474/09 / Teile-Nr. 1177974-EN

2
Operating instructions
Safety-monitoring module SRB 301LC/B
EN
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 re-
pairs, conversions and modications to the device are strictly forbidden;
the manufacturer shall accept no liability for damages resulting from
such invasive work, arbitrary repairs, conversions and/or modications
to the device.
2 Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SRB 301LC/B
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 specications 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 dened as the opening of enabling contacts
13-14, 23-24 and 33-34 when the inputs S11-S12 and/or S11-S22 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 B10d value assessment (also refer to “Requirements of
DIN EN ISO 13 849-1“):
– 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 13 849-1, 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/EN 61508
Climate resistance: EN 60068-2-78
Fixation: 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, self-cleaning,
positive drive
Weight: 230 g
Start conditions Automatic or start button
Feedback circuit (Y/N): Yes
ON delay with automatic start: approx. 300 ms
ON delay with reset button: approx. 20 ms
Drop-out delay in case
of emergency stop:
approx. 25 ms
Mechanical data:
Connection type: Screw connection
Min. cable section: 0.25 mm²
Max. cable section: 2.5 mm²
Connecting cable: rigid or exible
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 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: IP 40
Terminals: IP 20
Wiring compartment: IP 54
Air clearances and creepage
distances to IEC/EN 60664-1:
4 kV/2 (basic insulation)
EMC rating: conforming to EMC Directive
Electrical data:
Contact resistance in new state: max. 100 mΩ
Power consumption: max. 1.7 W / 1.9 VA
Rated operating voltage Ue: 24 VDC –15%/+20%,
residual ripple max. 10%
24 VAC –15% / +10%
Frequency range: 50 Hz / 60 Hz
Max. fuse rating of the
operating voltage:
internal t 0.5 A (5 x 20 mm)
Monitored inputs:
Short-circuit recognition (Y/N): No
Wire breakage detection (Y/N): Yes
Earth leakage detection (Y/N): Yes
Number of NO contacts: 0
Number of NC contacts: 2
Cable lengths: 1-channel without cross-wire
short detection:
– 1,500 m = 1.5 mm²
– 2,500 m = 2.5 mm²
2-channel without 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 protective wiring);
min. 10 V / 10 mA
Switching capacity of the
auxiliary contacts:
41-42: 24 VDC / 2 A
Fuse rating of the safety
contacts:
6 A slow blow
Recommended fuse for
the auxiliary contacts:
2 A slow blow
Utilisation category to
EN 60947-5-1:
AC-15 / DC-13: EN 60947-5-1:2007
Dimensions (H/W/D): 100 mm x 22.5 mm x 121 mm
The data specied in this manual are applicable when the component
is operated with rated operating voltage Ue±0%.

3
SRB 301LC/B
Operating instructions
Safety-monitoring module
EN
2.5 Safety classication
Standards: EN ISO 13849-1, IEC 61508,
EN 60947-5-1
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
B10d value (for one channel): Low voltages range 20%: 20,000,00
40%: 7,500,000
60%: 2,500,000
80%: 1,000,000
Maximum load 100%: 400,000
MTTF
B d x x
h
s/h3600
d
10d op op
op
n
0,1 x nop tcycle
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
tcycle = average demand rate of the safety function in s
(e.g. 4 × per hour = 1 × per 15 min. = 900 s)
(Specications can vary depending on the application-specic
parameters hop, dop and tcycle as well as the load.)
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
Wiring examples: see appendix
The electrical connection may only be carried out by
authorised personnel in a de-energised condition.
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 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/24 VAC
Inputs: S11-S12
S11-S22
Input channel 1 (+)
Input channel 2 (+)
Outputs: 13-14
23-24
33-34
First safety enabling circuit
Second safety enabling circuit
Third safety enabling circuit
Start: X1-X2
41-42
Feedback circuit to monitor
and external reset
Auxiliary NC contact
UB
Ui
K1
K2
33 23 13 41
X1 S12 S11 A1
X2 S22S21 A2
34 24 14 42
SRB
301
LC/B
Fig. 1
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. Proper xation
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 inuence 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 proper xation 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.

4
Operating instructions
Safety-monitoring module SRB 301LC/B
EN
8.3 Sensor conguration
Single-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.
• Control category 1 – PL c to DIN EN ISO 13849-1 possible, when
tested to DIN EN ISO 13849-1, paragraph 6.5.2.
Dual-channel emergency stop circuit with command devices
to DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 6)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are not detected.
• Control category 4 – PL e to DIN EN ISO 13849-1 possible (with
protected cable routing).
Single-channel guard door monitoring circuit with interlocking
devices to EN 1088 (Fig. 7)
• At least one contact with positive break required
• Wire breakage and earth leakage in the control circuits are detected.
• Control category 1 – PL c to DIN EN ISO 13849-1 possible, when
tested to DIN EN ISO 13849-1, paragraph 6.5.2.
S12
S11
S22
S12
S12
S11
S22
S11
S12
S11
S22
S12
Fig. 5 Fig. 6 Fig. 7
Dual-channel guard door monitoring circuit with interlocking
device to EN 1088 (Fig. 8)
• 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.
• Control category 4 – PL e to DIN EN ISO 13849-1 possible (with
protected cable routing).
Dual-channel control of magnetic safety switches to
EN 60 947-5-3 (Fig. 9)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are not detected.
• Control category: 3 to EN 954-1:1997
• Control category 3 – PL e to DIN EN ISO 13849-1:2007 possible
The connection of magnetic safety switches to the SRB
301LC/B safety-monitoring module is only admitted when
the requirements of the standard EN 60947-5-3:2005 are
observed.
As the technical data are regarded, at least the following
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
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: dual-channel control, suitable for increase in capacity
or number of contacts by means of contactors or relays with
positive-guidedcontacts.
• The control system recognises wire-breakage, earth faults and
cross-shorts in the monitoring circuit.
S = Feedback circuit
K
A
K
BN
K2
K1
14 24 34 42
K2
a)
K1
Ui
F1
K
B
K
A
A2
A1 S12 S11
J
S21 S22 X1 X2 13 23
L1
S
K
B
K
A
33 41
Fig. 2
a) Logic
8.2 Start conguration
External reset button (Fig. 3)
• The external reset button is integrated as shown.
• 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. 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.
K
B
J
S
K
A
X2
X1
K
BS
K
A
X2
X1
Fig. 3 Fig. 4

5
SRB 301LC/B
Operating instructions
Safety-monitoring module
EN
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 LED's for instance.
Dual-channel control of a safety-related (microprocessor-based)
safety guards with p-type transistor outputs e.g. AOPD's to
EN IEC 61496-1 (Fig. 10)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the monitoring circuits are usually detected
by the safety guards. The safety-monitoring module therefore is not
equipped with a cross-wire short detection.
• Control category: 3 to EN 954-1:1997
• If cross-wire shorts in the control circuits are detected by the safety
guard: control category 4 to EN 954-1:1997 possible.
• If cross-wire shorts in the control circuits are detected by the safety
guard: control category 4 – PL e to DIN EN ISO 13 849-1:2007
possible.
S12
S11
S22
S11
S22
S11
S12
S11
S12
+24V
S22
S11 S11 +24V
Fig. 8 Fig. 9 Fig. 10
8.4 Actuator conguration
Single-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.
Dual-channel control with feedback circuit (Fig. 12)
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 X2 2313
2414
K
C
K
AS
L1
N
K
A
K
C
X1 X2 2313
2414
K
B
K
C
K
D
K
A
K
B
L1
N
K
A
K
D
SK
C
Fig. 11 Fig. 12
Differentiated control with feedback circuit (Fig. 13)
• 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 X2 2313
2414
K
A
L1
N
K
A
S
a)
Fig. 13
a) Enabling signal controller

6
Operating instructions
Safety-monitoring module SRB 301LC/B
EN
8.5 EC Declaration of conformity
Note
The currently valid declaration of conformity can be
downloaded from the internet at www.schmersal.net.
EC Declaration of conformity
Translation of the original declaration of conformity
valid as of December 29, 2009
Elan Schaltelemente GmbH & Co. KG
Im Ostpark 2 · 35435 Wettenberg
Germany
Internet: www.elan.de
We hereby certify that the hereafter described safety components both in its basic design and
construction conforms to the applicable European Directives.
Place and date of issue: Wuppertal, September 9, 2009
Authorised signature
Heinz Schmersal
Managing Director
Name of the safety component: SRB 301LC/B
Description of the safety component: Safety-monitoring module for emergency
stop circuits, guard door monitoring,
magnetic safety switches and AOPD's
Harmonised EC-Directives: 2006/42/EC EC-Machinery Directive
2004/108/EC EMC-Directive
Person authorized for the compilation of the
technical documentation:
Ulrich Loss
Möddinghofe 30
42279 Wuppertal
Notied body, which approved the full quality
assurance system, referred to in Appendix X,
2006/42/EC:
TÜV Rheinland Industrie Service GmbH
Alboinstrasse 56
12103 Berlin
ID n°: 0035
Elan Schaltelemente GmbH & Co. KG
Im Ostpark 2, D35435 Wettenberg
Postfach 11 09, D - 35429 Wettenberg
Telefon: [phone]
Telefax: [phone]
E-Mail: [email protected]
Internet: www.elan.de
Appendix