SRB NA-R-C.33
Operating instructions
Safety-monitoring module
EN
1
EN
Operating instructions...................... pages 1 to 6
Translation of the original operating instructions
FR
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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 instruc-
tions 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 and 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 machinery or plant components cannot be excluded. The relevant
requirements of the standard EN 1088 must be observed.
Inhalt
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.7 Exclusion of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2 Product description
2.1 Ordering code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.2 Special versions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.3 Destination and use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.5 Safety classication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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
6 Set-up and maintenance
6.1 Functional testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
6.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
7 Disassembly and disposal
7.1 Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
8 Appendix
8.1 Wiring examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
8.2 Start conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
8.3 Sensor conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
8.4 Actuator conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
8.5 EC Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
04.02.2010 / Index: 82/10 / Teile-Nr. 1211785-EN
2
Operating instructions
Safety-monitoring module SRB NA-R-C.33
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
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 NA-R-C.33
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 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 for safety
functions on sliding, hinged and removable safety guards as well as
emergency stop control devices.
The safety function is dened as the opening of enabling circuits 13-14,
23-24 and 33-34 when the inputs T11-T12 and/or T11-T22 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
10d
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 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/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: Thermoplastic
Material of the contacts: AgSnO, self-cleaning, positive drive
Weight: 190 g
Start conditions Start button
Feedback circuit (Y/N): Yes
Drop-out delay: typ. 50 ms
Pull-in delay: typ. 20 ms
Mechanical data:
Connection type: Screw connection
Cable section: min. 0,25 mm
2
/ max. 2,5 mm
2
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: to EMC Directive
Electrical data:
Contact resistance in new state: max. 100 mΩ
Power consumption: max. 2.5 VA
Rated operating voltage U
e
: 24 VDC –15%/+20%,
residual ripple max. 10%
Max. fuse rating of
the operating voltage:
Internal F1: TM 0,25 A / 250 V
Cover F2: T 0.125 A / 250 V
Monitored inputs:
Cross-wire detection (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:
230 VAC: 6 A ohmic (inductive in
case of appropriate protective wiring)
Fuse rating of
the safety contacts:
6.3 A slow blow
Utilisation category
to EN 60947-5-1:
AC-15 / DC-13: EN 60947-5-1
Dimensions (H/W/D): 83 mm × 45 mm × 140 mm
The data specied in this manual is applicable when the component is
operated with rated operating voltage U
e
±0%.
3
SRB NA-R-C.33
Operating instructions
Safety-monitoring module
EN
2.5 Safety classication
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
B
10d
value (for one channel): Low voltages range 20%: 20,000,000
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 n
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
cycle
= average demand rate of the safety function in s
(e.g. 4 × per hour = 1 × per 15 min. = 900 s)
(Specications can vary depending on the application-specic
parameters hop, dop and t
cycle
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): 83 x 45 x 140 mm
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 1
• K2: Status channel 2
• U
i
: 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)
• UB: Status operating voltage (LED is on, when the operating
voltage on the terminals A1-A2 is ON)
Description of the terminals
Voltages: A1
A2
+24 VDC
0 VDC
Inputs: T11-T12
T11-T22
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: T33-T34
X1-X2
Reset
Feedback circuit
T33
41
42
T11
SRB-NA-R-C.33
34
T12
24
T12
T22
X2
K2UBK1
Ui
T34
a)
33
PE
23
X1
14
13
A2
A1
Fig. 1
a) Fuse
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.
4
Operating instructions
Safety-monitoring module SRB NA-R-C.33
EN
8.3 Sensor conguration
Single-channel emergency stop circuit with command devices
to DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 4)
• Wire breakage and earth leakage in the control circuits are detected.
• Possible control categories:
– 1 to EN 954-1
– 2 – PL d to DIN EN ISO 13849-1
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.
• Possible control categories:
– 4 to EN 954-1
– 4 – PL e to DIN EN ISO 13849-1
T12 T22
T12T11X2X1
T12
T11
T22
T11X2X1
Fig. 4 Fig. 5
Single-channel guard door monitoring circuit with interlocking
devices to EN 1088 (Fig. 6)
• At least one contact with positive break required
• Wire breakage and earth leakage in the control circuits are detected.
• Possible control categories:
– 1 to EN 954-1
– 2 – PL d to DIN EN ISO 13849-1
Dual-channel guard door monitoring circuit with interlocking
device to EN 1088 (Fig. 7)
• At least one contact with positive break required
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• Possible control categories:
– 4 to EN 954-1
– 4 – PL e to DIN EN ISO 13849-1
T12 T22
T12T11X2X1
T12
T11
T22
T11X2X1
Fig. 6 Fig. 7
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. 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 recognises wire-breakage and earth faults in the
monitoring circuit.
• Cat. 3 bzw. 4
• For an AC operating voltage, a detachable connection between the
device and the functional earth is required to DIN VDE 0110 Part 725.
K1
F1
F2
A1 T11 X1X2 T34
L1
N
K
A
K
A
K1
K2
A2 42
413323 51
K
A
K
B
J
S
342414
T12 T12 T22 13
K
B
K
B
PE
a)
K2
K1 K2
T33
Fig. 2
S = Feedback circuit
a) Logic
8.2 Start conguration
External reset button (non-monitored start) (see 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.
J
T34
T33
Fig. 3
5
SRB NA-R-C.33
Operating instructions
Safety-monitoring module
EN
8.4 Actuator conguration
Single-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.
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.
• S = Feedback circuit:
if the feedback circuit is not required, establish a bridge.
X1 X2 13
14
K
A
K
A
K
A
S
L1
N
X1 X2 13
14
K
B
K
A
K
B
K
A
K
B
L1
N
K
A
S
Fig. 8 Fig. 9
6
Operating instructions
Safety-monitoring module SRB NA-R-C.33
EN
SRBNA-R-C.33-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 conform to the applicable European Directives.
Place and date of issue: Wuppertal, October 6, 2009
Authorised signature
Heinz Schmersal
Managing Director
Name of the safety component: SRB NA-R-C.33
Description of the safety component: Safety-monitoring module for
emergency stop circuits and
guard door monitoring
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
Notied 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, D - 35435 Wettenberg
Postfach 1109, D - 35429 Wettenberg
Telefon: +49 (0)641 9848-0
Telefax: +49 (0)641 9848-420
E-Mail: info-elan@schmersal.com
Internet: www.elan.de
Appendix
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