2
Operating instructions
Safety-monitoring module
SRB 202MSL
EN
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.
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 202MSL
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 specifications apply accordingly, provided that they correspond
to the standard version.
2.3 Purpose
The safety-monitoring 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 or semi-
conductor sensors to initiate a muting function.
The safety function is defined as the opening of enabling circuits 13-14
and 23-24 when the inputs S11-S12 and/or S22-S23 are opened. The
safety-relevant current paths with the output contacts 13-14 and 23-24
meet the following requirements under observation of a B
10D
value
assessment (also refer to "Requirements of 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, DIN EN 61496-1
Climate resistance:
EN 60068-2-78
Mounting:
Snaps onto standard DIN rail
to DIN EN 60715
Terminal designations:
EN 60947-1
Material of the housings:
Plastic, glass-fibre reinforced
thermoplastic, ventilated
Material of the contacts:
AgSnO, AgNi, self-cleaning,
positive drive
Weight:
400 g
Start conditions:
by external muting sensors
Feedback circuit (Y/N):
yes
Pull-in delay:
typ. 200 ms
Drop-out delay in case of emergency stop:
typ. 20 ms
Drop-out delay on "supply failure":
typ. 60 ms
Time difference muting sensors:
typ. 2.5 sec
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:
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: IP40
Terminals: IP20
Clearance: IP54
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. 5.6 W plus signalling outputs and
muting indicators
Rated operating voltage U
e
:
24 VDC –15% / +20%,
residual ripple max. 10%
Fuse rating for the operating voltage:
F1: Internal electronic trip,
tripping current > 1.25 mA,
reset after approx. 1 sec.
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
Current and voltage at:
S11-S12: 23 VDC / 60 mA
S22-S23: 0 VDC / 60 mA
Outputs:
Number of safety contacts:
2
Number of auxiliary contacts:
0
Number of signalling outputs:
3
Switching capacity of the safety contacts:
13-14 / 23-24:
24 VDC, 4 A ohmic (inductive in
case of appropriate protective wiring);
DC-13: 24 VDC / 2 A
Fuse rating of the safety contacts:
4 A slow blow
Switching capacity of the signalling outputs:
L54 / L84: max. 50 mA
Muting indicators LA1 / LA2:
24 V / max. 0.5 A; min. 150 mA
