2
Operating instructions
Safety-monitoring module
SRB 401LC
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
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, ie with the front cover fitted
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SRB 401LC
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 21,
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 de-
signed 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
The safety function is defined as the opening of the enabling circuits
13-14, 23-24, 33-34 and 43-44 when the inputs S11 - S12 are opened
or when the supply voltage A1 and A2 is disconnected The safety-
relevant current paths with output contacts 13-14, 23-24, 33-34 and
43-44 meet the following requirements under observation of a PFH value
assessment (also refer to “Requirements of DIN EN ISO 13849-1“):
– Control category 3 - PL d to DIN EN ISO 13849-1
– SIL 2 to DIN EN 61508-2
– SILCL 2 to DIN EN 62061
(meets the requirements of control category 3 to DIN EN 954-1)
To determine the Performance Level (PL) of the entire safety function
(eg 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
Climatic resistance:
EN 60068-2-78
Mounting:
Snaps onto standard DIN rail to EN 60715
Terminal designations:
EN 60947-1
Material of the housings:
glass-fibre reinforced
thermoplastic, ventilated
Material of the contacts:
AgSnO, self-cleaning, positive drive
Weight:
190 g
Start conditions:
Automatic or start button
Feedback circuit (Y/N):
yes
ON delay with reset button:
typically 15 ms
Drop-out delay in case of emergency stop:
typically 20 ms
Drop-out delay on "supply failure":
typically 30 ms
bridging in case of voltage drops:
typically 20 ms
Mechanical data:
Connection type:
Screw connection
Cable sections:
0,25 … 2,5 mm
2
Pre-wired cable:
rigid or flexible
Tightening torque for the terminals:
0,6 Nm
With removable terminals (Y/N):
Nein
Mechanical life:
10 million operations
Electrical lifetime:
Derating curve available on request
Resistance to shock:
30 g / 11 ms
Resistance to vibrations to EN 60068-2-6:
10 … 55 Hz,
amplitude 035 mm
Ambient conditions:
Ambient temperature:
−25 °C … +60 °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:
conforming to EMC Directive
Electrical data:
Contact resistance in new state:
max 100 mΩ
Power consumption:
max 2,7 W / 5,0 VA
Rated operating voltage U
e:
24 VDC –15%/+20%,
residual ripple max 10%;
24 VAC –15%/+10%
Frequency range:
50 / 60 Hz
Max fuse rating of the operating voltage:
internal T 05 A
Monitored inputs:
Short-circuit recognition (Y/N):
refer to chapter 81
Wire breakage detection (Y/N):
Yes
Earth leakage detection (Y/N):
Yes
Number of NO contacts:
0
Number of NC contacts:
1
Cable length
:
1500 m mit 1,5 mm
2
2500 m mit 2,5 mm
2
Conduction resistance:
max 40 Ω
Outputs:
Number of safety contacts:
4
Number of auxiliary contacts:
1
Number of signalling outputs:
0
Max switching capacity of the safety contacts:
13 - 14; 23 - 24; 33 - 34, 43 - 44:
max 230 V, 6 A ohmic (inductive in case of
suitable protective wiring); min 10 V / 10 mA,
residual current at ambient temperature
up to 45°C: 24 A , 60°C: 16 A
Switching capacity of the auxiliary contacts:
51 - 52: 24 VDC / 2 A
Protection of the safety contacts:
external (I
k
= 1000 A) to
EN 60947-5-1, Safety fuse 10 A gl,
8 A quick blow, 6 A slow blow
Fuse rating for the auxiliary contacts:
external (I
k
= 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 VAC / 3 A
DC-13: 24 VDC / 2 A
Dimensions H × W × D:
100 × 225 × 121 mm
The data specified in this manual is applicable when the component is
operated with rated operating voltage U
e
± 0%
.
2.5 Safety classification
Standards:
EN ISO 13849-1, IEC 61508, EN 60947-5-1
PL:
up to d
Control category:
up to 3
PFH value:
≤ 2,00 × 10
-7
/h
SIL:
up to 2
Service life:
20 years
The PFH value of 200 × 10
-7
/h applies to the combinations of contact
load (current through enabling contacts) and number of switching
cycles (n
op/y
) mentioned in the table below
