2
Operating instructions
Safety-monitoring module
SRB 308IT
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 modiications to the device are strictly forbidden;
the manufacturer shall accept no liability for damages resulting from
such invasive work, arbitrary repairs, conversions and/or modiications
to the device.
2 Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SRB 308IT-
➀
No.
Option
Description
➀
24 V
24VDC/24VAC
115 V
115VAC
230 V
230VAC
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 speciications 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 itting 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 deined as the opening of enabling circuits 13-14,
23-24 and 33-34 when the inputs S11-S12 and/or S21-S22 and/or
S31-S32 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 13 849-1“):
– 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
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-ibre reinforced thermoplastic,
ventilated
Material of the contacts:
AgSnO, self-cleaning, positive drive
Weight:
24VDC/24VAC: 340 g
115VAC / 230VAC: 400 g
Start conditions
automatic or start button
(optionally monitored)
Feedback circuit (Y/N):
Yes
Pull-in delay with
automatic start:
typ. 60 ms
Pull-in delay with reset button:
typ. 200 ms
Drop-out delay in case
of emergency stop:
typ. 15 ms
Drop-out delay on
"supply failure":
on request
Mechanical data
Connection type:
Screw terminals
Cable section:
min. 0.25 mm
2
/ max. 2.5 mm
2
Connecting cable:
rigid or lexible
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. 3 W / 3 VA
Rated operating voltage U
e
:
24 VDC:
15% / +20%,
residual ripple max. 10%
230 VAC / 115 VAC / 24 VAC:
15% / +10%
Frequency range:
50 Hz / 60 Hz
Max. fuse rating of the
operating voltage:
Internal electronic trip,
tripping current F1: > 0.5 A,
Reset after disconnection
of supply voltage
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 lengths:
– 1,500 m = 1.5 mm²
– 2,500 m = 2.5 mm²
1-channel
2-channel without cross-wire
short detection
Conduction resistance:
max. 40 Ω
