Operating instructions
Safety-monitoring module
PROTECT SRB 101EXi-1A
8.3 Sensor conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
8.4 Actuator conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
9 Simple electrical apparatus
9.1 Devices that can be used as simple electrical apparatus . . . . . . . .7
9.2 Guidelines for installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
EN
Operating instructions...................... pages 1 to 8
Translation of the original operating instructions
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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 Destination and use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.5 Safety classication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3 Mounting
3.1 General mounting instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3.2 Mounting of the sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.3 Installation in Zone 2: particular conditions . . . . . . . . . . . . . . . . . . .3
3.4 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4 Electrical connection
4.1 General information for electrical connection. . . . . . . . . . . . . . . . . . 4
10 Appendix
10.1 EC Declaration of conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
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”.
19.02.2010 / Index: 167/10 / Teile-Nr. 1196280-EN
5 Operating principle and settings
5.1 LED functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.2 Description of the terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
5.3 Operating principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
5.4 Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6 Set-up and maintenance
6.1 Functional testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
6.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
7 Disassembly and disposal
7.1 Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
8 Appendix
8.1 Wiring examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
8.2 Start conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
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.
EN
1
Operating instructions
Safety-monitoring module PROTECT SRB 101EXi-1A
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.
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:
PROTECT SRB 101Exi-1A
Only if the information described in this operating instructions
manual are realised correctly, the safety function and therefore the compliance with the Machinery Directive and the
Explosion Protection 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 inputs of the SRB 101EXi-1 safety-monitoring module have
an intrinsically safe design according to EN 60079-11. As appropriate
intrinsically safe apparatus, the SRB can evaluate sensors located in
the Zone 2 / 22, 1/21 and must be installed outside of the Ex-area in
a suitable control box or control cabinet.
The SRB 101EXi-1A safety-monitoring module can also be used in
Zone 2 areas, when mounted in a suitable enclosure with at least IP 54
protection class to EN 60079-15. The relay contacts for the safety
enabling signal are designed with protection class nC, the terminals
for the supply with nA and those for the signal inputs with ib.
The safety function is dened as the opening of release 13-14 when
the inputs S11-S12 or S21-S22 are opened. The safety-relevant current
path with output contact 13-14 meets 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
– 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: glass-bre reinforced
thermoplastic, ventilated
Material of the contacts: AgSnO, self-cleaning, positive drive
Weight: aprox.230 g
Start conditions: Automatic or start button
Feedback circuit (Y/N): Yes
Pull-in delay with automatic start: typ. 300 ms
Drop-out delay in case
typ. 20 ms
of emergency stop:
Drop-out delay
typ. 20 ms
on "supply failure":
Bridging in case
typ. 15 ms
of voltage drops:
Mechanical data
Connection type: Screw terminals
Cable section: min. 0.25 mm
2
/ max. 2.5 mm
2
Connecting cable: rigid or exible
Tightening torque
0.6 Nm
for the terminals:
With removable
No
terminals (Y/N):
Mechanical life: 10 million operations
Electrical life: Derating curve available on request
Resistance to shock: 10 g / 11 ms
Resistance to vibrations
10 ... 55 Hz, amplitude 0.35 mm
to EN 60068-2-6:
Ambient conditions
Ambient temperature: –25°C … +60°C
Storage and transport
–40°C … +85°C
temperature:
Protection class: Enclosure: IP 40
Terminals: IP 20
Wiring compartment: IP 54
Air clearances and
creepage distances
IEC 60664-1: 4 kV/2
(basic insulation), EN 60079-11
EMC rating: to EMC Directive
Electrical data
Contact resistance
max. 100 mΩ
in new state:
Power consumption: max. 3.0 W
Rated operating voltage U
: 24 VDC –15% / +20%,
e
residual ripple max. 10%
Frequency range: 50 Hz / 60 Hz
Max. fuse rating of
the operating voltage:
internal fuse:
– F1: T 50 mA / 250 V
– F2: T 100 mA / 250 V
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 lengths: see EX-relevant Data:
Conduction resistance: see EX-relevant Data:
Outputs
Number of safety contacts: 1
Number of auxiliary contacts: 1
Number of signalling outputs: 0
Switching capacity of
the safety contacts:
13-14:
max. 230 V, 3 A ohmic
(inductive in case of appropriate
protective wiring) min. 10 V / 10 mA
Switching capacity of
24 VDC / 2 A
the auxiliary contacts:
2
EN
Operating instructions
B d x x
s/h3600
Safety-monitoring module
PROTECT SRB 101EXi-1A
Fuse rating of the
3.15 A slow blow
safety contacts:
Recommended fuse for
2 A slow blow
the auxiliary contacts:
Utilisation category
AC-15 / DC-13: EN 60947-5-1
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
± 0%.
e
EX-relevant Data
EG-prototype test/
prototype test:
Group, Category,
Ignition protection type:
TÜV 08 ATEX 7522
TÜV 08 ATEX 7557 X
L
II 3 G Ex nAnC IIC T5
Gas:
(SRB in zone 2)
Gas/dust: L II (2) GD [Ex ib] IIC /
[Ex ibD] (circuits in zone 1, 21/2, 22)
Maximum safety voltage U
: 253 VAC
m
(caution: Um is not a rated voltage!)
Inputs: S11-S12, S21-S22, X1-X3:
[Ex ib] IIC / [Ex ibD]
Temperature class: T5
Voltage U
Current I
Power P
Separation
(intrinsically safe/other circuits):
: 33.6 V
o
: 57.0 mA
o
: 478.8 mW (linear characteristic)
o
safe separation to EN 60079-11,
amplitude of the voltage 375 V
Gas group II C II B
external capacity
C
(nF)
o
external inductivity
(mH)
L
o
26 36 46 49 160 180 230 280 350 412
4.0 2.0 1.0 0.5 38.0 5.0 2.0 1.0 0.5 0.2
Reference values for cable:
C ≈ 200 nF/km, L ≈ 1 mH/km (C ≈ 200 pF/m, L ≈ 1 µH/m)
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 Mounting of the sensors
The installation of the intrinsically safe current circuits must be executed
in accordance with the applicable standards EN 60079-14 or EN 61241-14.
According to EN 60079-11, the following must be observed
for the installation: a distance of ≥ 6 mm must be observed
between the terminals of the intrinsically safe current circuits
and other intrinsically safe current circuits. Between the
terminals of the intrinsically safe current circuits and other,
non-intrinsically safe current circuits, a distance of ≥ 50 mm
must be observed.
The commissioning and installation are to be executed by
qualied professionals only.
3.3 Installation in Zone 2: particular conditions
• The devices must be installed in control or junction boxes, which meet
the requirements to EN 60079-15 and have at least protection class
IP 54 (Fig. 1). To respect temperature class T5, the device must have
a free volume of at least 2,400 cm
3
.
• 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 intrinsically safe current circuits of the device (light blue terminals)
may be lead in explosion-endangered areas. In this case, it must be
especially observed that they are safely separated from all non-intrinsically safe current circuits.
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 99% (high)
CCF: > 65 points
SIL: up to 3
Service life: 15 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
MTTF
d
10d op op
0,1 x n
n
op
op
For an average annual demand rate of nop = 126,720 cycles
h
t
cycle
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)
(Specications can vary depending on the application-specic
parameters hop, dop and t
as well as the load.)
cycle
• The connection and separation of the connections of
non-intrinsically safe current circuits is not authorised
in explosion-endangered atmospheres.
• Only use a damp cloth to clean the enclosure.
• The lifetime of the safety-monitoring related to the ignition
protection class "nC" is at least 15 years. Upon expiration
of this time, the safety-monitoring module must be replaced either returned to the manufacturer for check-up!
The temperature specications (–25°C ≤ Ta ≤ +60°C) of
the safety-monitoring module are related to a volume of the
control cabinet of at least approx. 2,400 cm3 for each SRB.
The distance with regard to other safety-monitoring module
imperatively must be at least approx. 5 cm.
EN
3
Operating instructions
Safety-monitoring module PROTECT SRB 101EXi-1A
a)
b)
5 cm
5 cm
c)
5 cm
5 cm
d)
Fig. 1
a) IP54 control box suitable for installation in Zone 2 to EN 60079-15
b) Air around the safety-monitoring module approx. 2,400 cm3
(8.25 × 16 × 18.1 cm)
c) Contactor II 3G
d) Terminals (Kl. II 3G)
Potential equalisation: wiring of the PA terminals (Fig. 2)
According to EN 60079-14 par. 12.2.4, 2 cables with a section of
at least 1.5 mm
the potential equalisation.
2
must be inserted between the PA terminals and
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
: Status operating voltage (LED is on, when the operating voltage
• U
B
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 F2 has not been
triggered)
• Ui: Status internal operating voltage (LED is on, when the operating
voltage on the terminals A1-A2 is ON and the fuse F1 has not been
triggered)
5.2 Description of the terminals
Voltages: A1
A2
Inputs: S11-S12
S21-S22
S21-S22
Outputs: 13-14 Safety release
Start: X1-X3
21-22
+24 VDC
0 VDC
Input channel 1 (+)
Input channel 2 (+)
Input channel 2 (–)
(with cross-wire short detection)
Feedback circuit and external reset
Auxiliary NC contact
0V X1 X3
S11 S12 S21 S22
U
EXi
SRB
101EXi
-1A
U
B
U
i
K1
K2
PA PA A1 A2
13 14 21 22
2
2 x 1,5 mm
Fig. 2
3.4 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
As far as the electrical safety is concerned, the protection
against unintentional contact of the connected and therefore
electrically interconnected apparatus and the insulation of the
feed cables must be designed for the highest voltage, which
can occur in the device.
5.3 Operating principle
• The SRB 101EXi-1A is a dual-channel safety-monitoring module for
monitoring emergency stop command devices, guard door monitors
and magnetic safety switches.
• When the safety circuits S11-S12 and S21-S22 and the feedback
circuit X1-X3 is closed, the safety-monitoring module is started and
the enabling circuit 13-14 is closed.
• The enabling circuit 13-14 is immediately opened when the emergen-
cy stop command device or another safety equipment is operated.
• Through the signalling path 21-22 an external control of the switching
condition of the SRB 101EXi-1A can be signalled for instance.
• The safety-monitoring module can only be restarted, when both
channels K1 and K2 have been enabled.
5.4 Adjustment
Opening the front cover (see Fig. 3)
• To open the front cover, insert a slotted screwdriver in
the top and bottom cover notch and gently lift it.
• When the front cover is open, the electrostatic discharge
requirements must be respected and observed.
• After setting, the front cover must be tted back in position.
Setting the switch (see Fig. 4)
• The cross-wire short monitoring function (factory setting) is
• programmed by means of the switch underneath the front
cover of the safety-monitoring module.
• The switch must only be operated in de-energised condition
by means of a nger or an insulated blunt tool.
• Pos. nQS (top), not cross-wire short proof:
suitable for 1-channel applications and applications with
outputs connected to potential in the control circuits.
• Pos. QS (bottom), cross-wire short proof:
suitable for 2-channel applications without outputs connected
to potential in the control circuits
4
EN
Operating instructions
1 S22
A2
Safety-monitoring module
PROTECT SRB 101EXi-1A
Only touch the components after electrical discharge!
S11 S12 S2
0V X1 X3
S11 S12 S21S22
U
EXi
SRB
101EXi
-1A
U
B
U
i
K1
K2
PA PA A1 A2
13 14 21 22
0V X1 X3
S11 S12 S21 S22
U
EXi
SRB
101EXi
-1A
U
B
U
i
K1
K2
PA PA A1 A2
13 14 21 22
nQS
QS
PA PA A1
Fig. 3 Fig. 4 Fig. 5
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
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. 6)
• 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, earth faults and cross-
wire shorts in the monitoring circuit.
• S = Feedback circuit
L1
+24 VDC
21A1 X1 X3
K
d)
B
N
a)
0V S12JS11 S21 S22
F1
b)
U
F2
U
B
EXi
U
i
A2 PA PA
Fig. 6
a) Installation in zone 1/21
b) Installation in zone 2
c) Logic
d) Control
8.2 Start conguration
K1 K2
K
B
S
K
A
13
nQS
QS
c)
K1
K2
14 22
K
A
K
A
K
B
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
The device has to be integrated into the periodic check-ups
according to the Ordinance on Industrial Safety and Health/the
ATEX Directive (99/92/CE), however at least 1x/year.
Troubleshooting
No changes are allowed to devices, which are used in conjunction
with explosion-endangered areas.
Repairs to the devices are not authorised either.
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.
External reset button (without edge detection) (see Fig. 7)
• The reset button is integrated in the feedback circuit in series
as shown.
• The safety-monitoring module is activated upon actuation of
the reset button.
• The reset button is controlled through an individual
intrinsically safe current circuit.
• To start the safety-monitoring module, the reset button
may be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
Automatic start (see Fig. 8)
• The automatic start is programmed by connecting the feedback
circuit to the terminals. If the feedback circuit is not required,
establish a bridge.
• The feedback circuit is controlled through an individual intrinsically
safe current circuit.
• Caution: Not admitted without additional measure due to the risk
of gaining access by stepping behind!
• within the meaning of EN 60204-1:2006 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.
EN
5
Operating instructions
Safety-monitoring module PROTECT SRB 101EXi-1A
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
J
K
A
K
B
X3
Fig. 7 Fig. 8
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. 9)
• Wire breakage and earth leakage in the control circuits are detected.
• For the safety circuits monitoring, the emergency stop command
devices may be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 2 – PL d to DIN EN ISO 13849-1 possible
Dual-channel emergency stop circuit with command devices
to DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 10)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are not detected.
• For the safety circuits monitoring, the emergency stop command
devices may be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 4 – PL e to DIN EN ISO 13849-1 possible
(with protective wiring).
Dual-channel emergency stop circuit with command devices to
DIN EN ISO 13850 (EN 418) and EN 60947-5-5 (Fig. 11)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• For the safety circuits monitoring, the emergency stop command
devices may be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 4 – PL e to DIN EN ISO 13849-1
S11
S12
nQS
QS
S12
S22
Fig. 9 Fig. 10 Fig. 11
Single-channel guard door monitoring circuit with
interlocking devices to EN 1088 (Fig. 12)
• At least one contact with positive break required
• Wire breakage and earth leakage in the control circuits are detected.
• For the safety circuits monitoring, the interlocking devices may be
designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 2 – PL d to DIN EN ISO 13849-1 possible
S11
S12
S21
S22
X1
K
A
K
B
X3
S11
S21
nQS
QS
S12
S22
nQS
QS
Dual-channel guard door monitoring circuit with
interlocking device to EN 1088 (Fig. 13)
• 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 not detected.
• For the safety circuits monitoring, the interlocking devices may be
designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 4 – PL e to DIN EN ISO 13849-1 possible
(with protective wiring).
Dual-channel guard door monitoring circuit with
interlocking device to EN 1088 (Fig. 14)
• 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.
• For the safety circuits monitoring, the interlocking devices may be
designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 4 – PL e to DIN EN ISO 13849-1
S11
S12
nQS
QS
S12
S22
Fig. 12 Fig. 13 Fig. 14
Dual-channel control of magnetic safety switches
to EN 60 947-5-3 (see Fig. 15)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are not detected.
• For the safety circuits monitoring, the magnetic safety sensors may
be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 3 – PL e to DIN EN ISO 13849-1 possible.
Dual-channel control of magnetic safety switches
to EN 60947-5-3 (see Fig. 16)
• Wire breakage and earth leakage in the control circuits are detected.
• Cross-wire shorts between the control circuits are detected.
• For the safety circuits monitoring, the magnetic safety sensors may
be designed as “simple electrical apparatus”.
• Examples see chapter 9 Simple “electrical apparatus – intrinsic safety”
• Control category 3 – PL e to DIN EN ISO 13849-1 possible.
The connection of magnetic safety switches to the SRB
101EXi-1A safety-monitoring module is only admitted when
the requirements of the standard EN 60 947-5-3 are observed.
As the technical data are regarded, at least the following
requirements must be met:
– Switching capacity: min. 3 W
– Switching voltage: min. 40 VDC
– Switching current: min. 75 mA
S11
S21
nQS
QS
S11
S21
nQS
QS
S12
S22
S11
S21
S11
S21
nQS
QS
S12
S22
nQS
QS
S12
S22
Fig. 15 Fig. 16
6
EN
S12
S22
Operating instructions
Safety-monitoring module
PROTECT SRB 101EXi-1A
8.4 Actuator conguration
Single-channel control with feedback circuit (Fig. 17)
• Suitable for increase in capacity or number of contacts by
means of contactors or relays with positive-guided contacts.
• If the feedback circuit is not required, establish a bridge.
According to EN 60079-11, the following must be observed
for the installation: a distance of ≥ 6 mm must be observed
between the terminals of the intrinsically safe current circuits
and other intrinsically safe current circuits. Between the
terminals of the intrinsically safe current circuits and other,
non-intrinsically safe current circuits, a distance of ≥ 50 mm
must be observed.
Dual-channel control with feedback circuit (Fig. 18)
• Suitable for increase in capacity or number of contacts by
means of contactors or relays with positive-guided contacts.
• If the feedback circuit is not required, establish a bridge.
According to EN 60079-11, the following must be observed for
the installation: a distance of ≥ 6 mm must be observed between
the terminals of the intrinsically safe current circuits and other
intrinsically safe current circuits. Between the terminals of the
intrinsically safe current circuits and other, non-intrinsically safe
current circuits, a distance of ≥ 50 mm must be observed.
+24 VDC
L1
S
K
A
X1 X3 2113
+24 VDC
L1
K
K
A
S
X1 X3 2113
B
9.1 Devices that can be used as simple electrical apparatus
On the basis of a valid declaration of the manufacturer with an assess-
ment as simple electrical apparatus, the following devices can be used:
Reset buttons
• EX-RDT... (Elan Schaltelemente GmbH & Co. KG)
• EX-RDM... (Elan Schaltelemente GmbH & Co. KG)
Emergency stop control devices
EX-RDRZ... (Elan Schaltelemente GmbH & Co. KG)
Solenoid interlocks
• EX-AZ 16-...-3D (K.A. Schmersal GmbH)
• EX-AZ 17-...-3D (K.A. Schmersal GmbH)
• EX-AZ 335-...-3D (K.A. Schmersal GmbH)
• EX-AZ 355-...-3D (K.A. Schmersal GmbH)
• EX-AZ 415-...-3D (K.A. Schmersal GmbH)
• EX-AZ 3350-...-3D (K.A. Schmersal GmbH)
• EX-Z/T 235-...-3D (K.A. Schmersal GmbH)
• EX-Z/T 335-…-3D (K.A. Schmersal GmbH)
Safety sensors
• EX-BN 20-...-3G/D (K.A. Schmersal GmbH)
• EX-BNS 33-...-3G/D* (K.A. Schmersal GmbH)
• EX-BNS 120-...-3G/D* (K.A. Schmersal GmbH)
• EX-BNS 180-...-3G/D (K.A. Schmersal GmbH)
• EX-BNS 303-...-3G/D* (K.A. Schmersal GmbH)
* however version without LED
9.2 Guidelines for installation
Range of application to the ATEX Directives:
• Category 2G, 3G: use in explosion-endangered areas due
to the presence of gas of Zone 1 and 2
• Category 2D, 3D: use in explosion-endangered areas due
to the presence of dust of Zone 21 and 22
2214
K
a)
A
N
Fig. 17
a) Control
S = Feedback circuit
N
Fig. 18
a) Control
S = Feedback circuit
2214
K
A
a)
K
B
9 Simple electrical apparatus
An assessment of simple electrical apparatus
to EN 60079-11 and EN 61241-11 must be executed.
As simple electrical apparatus within the meaning of intrinsic safety
do not represent a potential source of ignition, the Directive 94/9/EC
is not applicable. To demonstrate the intrinsic safety to EN 60079-14,
a declaration of the manufacturer therefore can be used.
The devices classied as simple electrical apparatus
can be used in the Zones 1 /2 and 21 / 22.
Only the intrinsically safe current circuit of the SRB 101EXi-1A
must be wired to the simple electrical apparatus.
Requirements for the intrinsically safe current circuit:
• The enclosures have at least protection class IP 54 (EN 60529) for gas,
IP6X for dust (IP5X in case of non-conductive dusts in Zone 22).
For reset buttons, emergency stop command devices, interlocking
devices and magnetic safety switches, the following is applicable:
Instructions for the installation:
• The risk of mechanical damage to the simple electrical apparatus
must be observed depending on the place of installation. Additional
measures to provide for a mechanical protection are useful, for instance when a potential difference through the earth wire can
occur due to damage.
Technical data in the intrinsically safe current circuit:
• Voltage U
: 33.6 V
o
• Current Io: 57.0 mA
• Capacity Po: 479 mW (linear characteristic)
• Co capacity: refer to the table with Ex-relevant data
• Lo inductivity: refer to the table with Ex-relevant data
Cable/wire (example):
• A mechanical protection for the cable(s) must be provided.
• The cable(s) must be separated from other, non-intrinsically
safe current circuits.
EN
7
Operating instructions
Safety-monitoring module PROTECT SRB 101EXi-1A
10 Appendix
10.1 EC Declaration of conformity
EC Declaration of conformity
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 conform to the applicable European Directives.
Name of the safety component: SRB 101EXi-1A
Description of the safety component: Safety-monitoring module for emergency stop
Harmonised EC-Directives: 2006/42/EC EC-Machinery Directive
Afxing of the CE conformity mark:
Used harmonized standards: EN 60079-15 EN 61241-0 EN 61241-11
Person authorized for the compilation
of the technical documentation:
Notied body: TÜV Rheinland Industrieservice GmbH
EC- test certicate: TÜV 08 ATEX 7522
Elan Schaltelemente GmbH & Co. KG
Im Ostpark 2 · 35435 Wettenberg
Germany
Internet: www.elan.de
L II 3 G Ex nAnC IIC T5
L II (2) GD [Ex ib] IIC / [Ex ibD]
circuits and guard door monitoring
1)
94/9/EC EC-Explosion Protection Directive (ATEX)
2004/108/EC EMC-Directive
1)
for safety components, whose type plate is labelled
"safety component"
EN 60079-0 EN 60079-11
Ulrich Loss - Möddinghofe 30 - 42279 Wuppertal
Alboinstraße 56 · 12103 Berlin
ID n°: 0035
EC- test certicate: TÜV 08 ATEX 7557 X
Place and date of issue: Wettenberg, October 6, 2009
PROTECT-SRB101EXI-1A-B-EN
Elan Schaltelemente GmbH & Co. KG
Im Ostpark 2, D35435 Wettenberg
Postfach 11 09, D - 35429 Wettenberg
Telefon: +4 9 (0)6 41 9848-0
Telefax +49 - (0)641 - 9848 - 420
E-Mail: info-elan@schmersal.com
Internet: www.elan.de
Authorised signature
Heinz Schmersal
Managing Director
Note
The currently valid declaration of conformity can be
downloaded from the internet at www.schmersal.net.
8
EN
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