schmersal SRB 301HC/R-24V User manual

SRB 301HC/R-24V
SRB 301HC/R-230V
Operating instructions
Safety relay module
EN 1
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.
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 indicates 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 Schmersal range of products is not intended for private consumers.
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.
Further technical information can be found in the Schmersal
catalogues or in the online catalogue on the Internet:
products.schmersal.com.
The information contained in this operating instructions manual is
provided without liability and is subject to technical modifications.
There are no residual risks, provided that the safety instructions as well
as the instructions regarding mounting, commissioning, operation and
maintenance are 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 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 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 LED functions..........................................3
5.2 Description of the terminals ...............................3
5.3 Circuit technical notes ...................................3
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
8 Appendix
8.1 Wiring examples .......................................4
8.2 Start conguration ......................................4
8.3 Sensor conguration ....................................5
8.4 Actuator conguration ...................................5
9 EU Declaration of conformity
x.000 / 10.2022 / v.A. - 101190616-EN / G / 2022-10-19 / AE-Nr. 15192
EN Operating instructions . . . . . . . . . . . . . . .pages 1 bis 6
Original

2
Operating instructions
Safety relay module
SRB 301HC/R-24V
SRB 301HC/R-230V
EN
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 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 301HC/R-
➀
No. Option Description
➀
24V 24 VAC/DC
230V 48 … 240 VAC
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 ordering code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Purpose
The safety relay 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 for safety functions on
sliding, hinged and removable safety guards as well as emergency stop
control devices, safety mats (SMS from Schmersal) and two-hand
controls to EN ISO 13851, III/C type.
The safety function is defined as the opening of enabling contacts 13-14,
23-24 and 33-34 when the inputs S13-S14 and/or S23-S24 are opened.
The safety-relevant current paths with the outputs contacts 13-14, 23-24
and 33-34 meet the following requirements under observation of a PFH
value assessment (also refer to chapter 2.5 "Safety classification"):
– Control category 4 – PL e to EN ISO 13849-1
– corresponds to SIL 3 to IEC 61508 and EN 62061
To determine the Performance Level (PL) to EN ISO 13849-1 of the
entire safety function (e.g. sensor, logic, actuator), an assessment of
all relevant components is required.
The entire concept of the control system, in which the safety
component is integrated, must be validated to the relevant
standards.
2.4 Technical data
General data:
Standards: EN 60204-1, EN 60947-5-1,
EN ISO 13849-1, IEC 61508
Climate resistance: EN 60068-2-78
Mounting: snaps onto standard rail
to EN 60715
Terminal designations: EN 60947-1
Material of the housings: Plastic, glass-fibre reinforced
thermoplastic, ventilated
Material of the contacts: AgSnO, self-cleaning, positive drive
Weight: 24 V-version: 320 g, 230 V-version: 340 g
Start conditions: start button
Feedback circuit (Y/N): Yes
Pull-in delay with start button: typ. 50 ms
Drop-out delay in case of emergency stop: typ. 20 ms
Drop-out delay on "supply failure": typ. 100 ms
Bridging in case of voltage drops: typ. 90 ms
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: 30 g / 11 ms
Resistance to vibration in accordance with EN 60068-2-6: 10 ... 55 Hz,
Amplitude 0.35 mm
Ambient conditions:
Ambient temperature: –25 °C … +60 °C
Storage and transport temperature: –40 °C … +85 °C
Degree of protection: Enclosure: IP40
Terminals: IP20
Clearance: IP54
Air clearances and creepage distances to 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: 24 V-version: max. 1.4 W / 3.3 VA
230 V-version: max. 1.6 W / 4.2 VA
Rated operating voltage Ue:
- 24 V-version: –24 VDC –15% / +20%,
residual ripple max. 10%
–24 VAC –15% / +10%,
- 230 V-version: 48 … 240 VAC
Frequency range: 50 / 60 Hz
Fuse rating for the operating voltage:
- 24 V-version: F1: internal electronic fuse,
tripping current > 500 mA;
secondary side: internal electronic fuse,
tripping current > 0,12 A
- 230 V-version: primary side: safety fuse, tripping current T 1 A
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
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 appropriate protective wiring);
min. 10 V / 10 mA
Switching capacity of the auxiliary contacts: 41-42: 24 VDC / 2 A

3
SRB 301HC/R-24V
SRB 301HC/R-230V
Operating instructions
Safety relay module
EN
Fuse rating of the safety contacts: external (Ik= 1000 A)
to EN 60947-5-1
Safety fuse 10 A quick blow, 8 A slow blow
Fuse rating for the auxiliary contacts: external (Ik= 1000 A)
to EN 60947-5-1
Safety fuse 2.5 A quick blow, 2 A slow blow
Utilisation category to EN 60947-5-1: AC-15: 230 V / 4 A
DC-13: 24 V / 2 A
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 62061
PL: up to e
Category: up to 4
DC: 99% (high)
CCF: > 65 points
PFH: ≤ 2,00 × 10-8/h
SIL: up to 3
Mission time: 20 years
The PFH value of 2.00 × 10-8/h applies to the combinations of contact
load (current through enabling contacts) and number of switching
cycles (nop/y) mentioned in the table below. At 365 operating days per
year and a 24-hours operation, this results in the below-mentioned
switching cycle times (tcycle) for the relay contacts.
Diverging applications upon request.
Contact load nop/y tcycle
20 % 525,600 1.0 min
40 % 210,240 2.5 min
60 % 75,087 7.0 min
80 % 30,918 17.0 min
100 % 12,223 43.0 min
3. Mounting
3.1 General mounting instructions
Mounting: snaps onto standard rails to EN 60715.
Snap the bottom of the enclosure slightly tilted forwards in the rail and
push up until it latches in position.
To avoid EMC disturbances, the physical ambient and
operational conditions at the place where the product
is installed, must meet the provisions laid down in the
paragraph "Electromagnetic Compatibility (EMC)" of
EN 60204-1.
3.2 Dimensions
Device dimensions (H/W/D): 100 x 45 x 121 mm
with plugged-in terminals: 120 × 45 × 121 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.
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.
Settle length x of the conductor: 7 mm
XX
Wiring examples: see appendix
5. Operating principle and settings
5.1 LED functions
• ON: supply voltage is on. / OFF: supply voltage missing, short-circuit
between inputs S13-S14, S23-S24, internal power supply error
• IN A: ON: input S13-S14 closed / OFF: input S13-S14 open or wire
breakage
• IN B: ON: input S23-S24 closed / OFF: input S23-S24 open or wire
breakage
• OUT: ON: both internal relays are interconnected, when S13-S14
and S23-S24 are closed and the feedback circuit is closed / OFF:
when the inputs S13-S14 or S23-S24 or the feedback circuit are/is
not closed
5.2 Description of the terminals
Voltages: A1
A2
+24 VDC / 24 VAC / 48 … 230 VAC
0 VDC / 24 VAC
Inputs: S13-S14
S23-S24
Input channel 1 (+)
Input channel 2 (–)
Outputs: 13-14
23-24
33-34
First safety enabling circuit (stop 0)
Second safety enabling circuit (STOP 0)
Third safety enabling circuit (stop 0)
Feedback
circuit:
S23-X3
Start: S13-X2 Manual start (reset button)
Signalling
output:
41-42 Auxiliary contact
ON
IN A
IN B
OUT
A1 S13S24 X2
A2 S14S23 X3
41 2313 33
42 2414 34
SRB 301HC/R
-xxV
Fig. 1
5.3 Circuit technical notes
Signalling outputs must not be used in safety circuits.

4
Operating instructions
Safety relay module
SRB 301HC/R-24V
SRB 301HC/R-230V
EN
6. Set-up and maintenance
6.1 Functional testing
The safety function of the safety relay 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
If a manual functional check is necessary to detect a possible
accumulation of faults, then this must take place during the
intervals noted as follows:
• at least every month for PL e with category 3 or category 4
(according to EN ISO 13849-1) or SIL 3 with HFT (hardware
fault tolerance) = 1 (according to EN 62061).
• at least every 12 months for PL d with category 3 (according
to EN ISO 13849-1) or SIL 2 with HFT (hardware fault
tolerance) = 1 (according to EN 62061).
Damaged or defective components must be replaced.
7. Disassembly and disposal
7.1 Disassembly
The safety relay module must be disassembled in a de-energised
condition only. Push up the bottom of the enclosure and hang out
slightly tilted forwards.
7.2 Disposal
The safety relay module must be disposed of in an appropriate manner
in accordance with the national prescriptions and legislations.
8. Appendix
8.1 Wiring examples
Dual-channel control, shown for a guard door monitor; with two
contacts A and B, where at least one is a positive break contact;
with external reset button
J
(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 positive-
guided contacts.
• The control system recognises wire-breakage and earth faults in the
monitoring circuit.
• Cross-wire shorts between the monitoring circuits are detected.
•
S
= Feedback circuit
A1
AB
S13 S14 S23
J
S24 X2 X3
K
B
K
A
K
A
K
B
K2
K1
A2 14
N
24 34 42
S
K2
a)
K1
ON OUT
IN A IN B
F1
13 23 33
L1
41
K
B
K
A
Fig. 2 a) Logic
8.2 Start configuration
External reset button with edge detection (see Fig. 3 and Fig. 4)
• The reset button and feedback circuit can be integrated as shown.
• The safety-monitoring module is activated by the reset (after release)
of the reset button (= detection of the trailing edge). Faults in the reset
button, e.g. welded contacts or manipulations which could lead to an
inadvertent restart, are detected in this configuration and will result in
an inhibition of the operation.
X2
J
S13
X3
S23
KA
S
KB
X2
S13
KB
J
KA
X3
S23
Fig. 3 Fig. 4

5
SRB 301HC/R-24V
SRB 301HC/R-230V
Operating instructions
Safety relay module
EN
8.3 Sensor configuration
Two-hand control (see Fig. 5)
Only the operator is protected by the two-hand switching
circuit.
• The SRB 301HC/R is designed for connecting two actuating elements,
which are each antivalently equipped with an NC and an NO contact.
Both actuating elements must be actuated simultaneously within a time
of ≤ 0.5 s according to the type III C requirements of EN ISO 13851.
If this time is exceeded, both actuating elements must be released,
before the restart can be initiated.
• Malfunction of every contact as well as earth leakages (not in the 230 V
variant) and cross-wire shorts are detected.
• Feedback circuit
S
:
The safety-technical function of external positive-guided contactors
is monitored by a series-wiring of the NC contacts as shown. In idle
state, this circuit must be closed.
• Category 4 – PL e to EN ISO 13849-1 possible.
S14
S13
S23
S24
KAKB
S
X3
X2
Fig. 5
Dual-channel emergency stop circuit with command devices to
EN ISO 13850 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 detected.
• Category 4 – PL e to EN ISO 13849-1 possible.
S14
S13
S23
S24
Fig. 6
Dual-channel guard door monitoring circuit with interlocking
device to EN ISO 14119 (Fig. 7)
• 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 detected.
• Category 4 – PL e to EN ISO 13849-1 possible.
Safety mat to EN ISO 13856-1 (see Fig. 8)
• • In combination with SMS safety mat (from Schmersal).
• With reset function
• The connection of the inputs is realised through the safety mat here.
• When the safety mat is actuated, the potentials of both inputs are
connected, so that a cross-wire short is created and the device is
safely shut down.
• Category 3 – PL d to EN ISO 13849-1 possible.
S14
S13
S23
S24
S14
S13
S23
S24
Fig. 7 Fig. 8
8.4 Actuator configuration
Single-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.
Dual-channel control with feedback circuit (see Fig. 10)
• 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.
S23 X3 13
14
K
AS
L1
N
K
A
K
A
S23 X3 13
14
K
B
K
A
K
B
L1
N
K
A
S
K
A
K
B
Fig. 9 Fig. 10

6EN
SRB301HC/R-E-EN
Operating instructions
Safety relay module
SRB 301HC/R-24V
SRB 301HC/R-230V
9. EU Declaration of conformity
Name of the component: SRB301HC/R-24V, SRB301HC/R-230V
Description of the component: Safety-monitoring module for emergency stop circuits,
guard door monitoring, safety mats and two-hand controls
Relevant Directives: Machinery Directive
EMC-Directive
RoHS-Directive
2006/42/EC
2014/30/EU
2011/65/EU
Applied standards: EN 60947-5-1:2017 + AC:2020
EN ISO 13851:2019
EN ISO 13849-1:2015
EN ISO 13849-2:2012
Notied body for the prototype test: TÜV Rheinland Industrie Service GmbH
Am Grauen Stein, 51105 Köln
ID n°: 0035
EC-prototype test certicate: 01/205/5157.02/22
Person authorised for the compilation
of the technical documentation:
Oliver Wacker
Möddinghofe 30
42279 Wuppertal
K.A. Schmersal GmbH & Co. KG
Möddinghofe 30, 42279 Wuppertal
Germany
Telephone: [phone]
Telefax: [phone]
E-Mail: [email protected]
Internet: www.schmersal.com
Place and date of issue: Wuppertal, October 5, 2022
Authorised signature
Philip Schmersal
Managing Director
EU Declaration of conformity
Original K.A. Schmersal GmbH & Co. KG
Möddinghofe 30
42279 Wuppertal
Germany
Internet: www.schmersal.com
We hereby certify that the hereafter described components both in their basic design and construction conform
to the applicable European Directives.
The currently valid declaration of conformity can be
downloaded from the internet at products.schmersal.com.