2
Operating instructions
Safety-monitoring module
SRB 202CS / SRB 202CS/T / SRB 202CA/T /
SRB 202CA/QT / SRB 202CA / SRB 202CA/Q
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 re
-
pairs, 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.
2 Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SRB 202
➀
No. Option Description
➀
CS
Reset
not monitored
, optionally automatic reset*
CS/T
Reset
monitored*
CA
Reset
not monitored
, optionally automatic reset*,
switch-off level 2 with antivalent inputs
CA/T
Reset
monitored
*, switch-off level 2 with
antivalent inputs, cross-wire short detection*
CA/Q
Reset
not monitored
, optionally automatic reset*,
switch-off level 2 with antivalent inputs
CA/QT
Reset
monitored
*, switch-off level 2 with
antivalent inputs, cross-wire short detection*
* with reference to switch-off level 1
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 Destination and use
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 magnetic
safety sensors for safety functions on sliding, hinged and removable
safety guards as well as emergency stop control devices and AOPD’s.
The safety function is defined as the opening of enabling circuits 13-24
when the inputs S31-S32 and/or S41-S42 (S43-S44) are opened and
as the opening of enabling circuits 13-14 and 13-24 when the inputs
S12 and/or S22 are opened.The safety-relevant current paths with the
output contacts 13-14 and 13-24 meet the following requirements under
observation of a B
10d
value assessment (also refer to “Requirements to
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/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-fibre reinforced thermoplastic,
ventilated
Material of the contacts:
AgSnO, AgNi, self-cleaning,
positive drive
Weight:
235 g
Start conditions
Automatic or start button
(Refer to 2.1 Ordering code)
Feedback circuit (Y/N):
Yes
Pull-in delay with reset button: Switch-off level 1: typ. 40 ms
Switch-off level 2: typ. 0.5 sec.
Drop-out delay in case
of emergency stop:
typ. 50 ms
Mechanical data
Connection type:
Screw connection
Cable section:
min. 2 mm
2
/ max. 2 mm
2
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: 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. 4.4 W
Rated operating voltage U
e
:
24 VDC –15%/+20%,
residual ripple max. 10%
Max. fuse rating of
the operating voltage:
electronic fuse,
tripping current > 1 A;
reset after approx. 1 sec.
Monitored inputs
Cross-wire detection (Y/N):
Refer to 2.1 Ordering code
Wire breakage detection (Y/N):
Yes
Earth leakage detection (Y/N):
Yes
Number of NO contacts:
CS, CS/T: 0 pc.
CA, CA/T, CA/Q, CA/QT: 1 pc.
Number of NC contacts:
CS, CS/T: 4 pc
CA, CA/T, CA/Q, CA/QT: 3 pc
Current and voltage limitation
of the control contacts:
S31-S32, S43-S44:
26 VDC / 100 mA26 VDC / 100 mA
Cable lengths:
1-channel without cross-wire
short detection:
– 1,500 m = 1.5 mm²
– 2,500 m = 2.5 mm²
2-channel with or without
cross-wire short detection
Conduction resistance:
max. 40 Ω
