2
Operating instructions
Safety-monitoring module
SRB 301/CL1
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 301/CL1
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 for safety
functions on sliding, hinged and removable safety guards as well
as emergency stop control devices. They have a defined switch-off
behaviour in case of a momentary supply failure.
The safety function is defined as the opening of the enabling circuits
13-14, 23-24 and 33-34 when the inputs C1-S1 and/or D1-S2 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 13849-1“):
– Control category 4 – PL e to DIN EN ISO 13849-1
– corresponds to SIL 3 to DIN EN 61508-2
– corresponds to SILCL 3 to DIN EN 62061
(corresponds to 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 61508
Climate resistance:
EN 60068-2-78
Mounting:
Snaps onto standard DIN 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:
250 g
Start conditions:
Automatic or start button
Feedback circuit (Y/N):
yes
Pull-in delay for automatic start:
typ. 110 ms
Pull-in delay with reset button:
typ. 20 ms
Drop-out delay in case of emergency stop:
typ. 30 ms
Drop-out delay on "supply failure":
typ. 30 ms
Bridging in case of voltage drops:
typ. 20 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):
Nein
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. 2 W
Rated operating voltage U
e
:
24 VDC –15% / +20%,
residual ripple max. 10%,
min. 10 V / 10 mA
Fuse rating for the operating voltage:
electronic fuse,
Tripping current > 0.4 A;
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 = 1.5 mm²
–2,500 m = 2.5 mm²
2-channel with 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
appropriate protective wiring)
Switching capacity of the auxiliary contacts:
41-42: 24 VDC / 2 A
Fuse rating of the safety contacts:
6.3 A slow blow
Recommended fuse for the auxiliary contacts:
2 A slow blow
Utilisation category to IEC/EN 60947-5-1:
AC-15 / DC-13:
EN 60947-5-1
Dimensions H x W x D:
100 mm x 22,5 mm x 121 mm
The data specified in this manual are applicable when the component is
operated with rated operating voltage U
e
±0%.
