2
Operating instructions
Safety-monitoring module SRB 031MC
EN
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 resul-
ting 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.
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 031MC
Drop-out delay preset in factory:
1,5 sec.; 1,1 sec.; 0,7 sec.; 0,4 sec.
Only if the information described in this operating instructions
manual are realised correctly, the safety function and therefo-
re 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 desi-
gned 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 delayed opening of the enabling
circuits 17 - 18, 27 - 28 and 37 - 38 when the inputs S11 - S12 and/
or S21 - S22 are opened. The safety-relevant current paths with the
outputs contacts 17 - 18, 27 - 28 and 37 - 38 meet the following requi-
rements under observation of a PFH value assessment (also refer to
chapter 2.5 "Safety classification"):
(meets the requirements of control category 3 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. 100 ms
Pull-in delay with reset button: typ. 20 ms
Drop-out delay in case of emergency stop: Delay time ±30% at 24 VDC
and duty cycle (on-time) > 3.5 sec.
Drop-out delay in case of power failure: Delay time ±30% at 24 VDC
and duty cycle (on-time) > 3.5 sec.
Drop-out delay in case of voltage drops: Delay time ±30% at 24 VDC
and duty cycle (on-time) > 3.5 sec.
Bridging in case of voltage drops: Delay time ±30% at 24 VDC
and duty cycle (on-time) > 3.5 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): 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:
Storage and transport temperature:
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:
Power consumption: max. 2.0 W / 4.9 VA
Rated operating voltage Ue:
residual ripple max. 10%,
Frequency range: 50 / 60 Hz
Fuse rating for the operating voltage: Internal electronic trip,
tripping current > 500 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:
Outputs:
Number of safety contacts: 3
Number of auxiliary contacts: 1
Number of signalling outputs: 0
Max. switching capacity of the safety contacts: 17-18; 27-28;37-38:
max. 250 V, 8 A ohmsch (ohmic (inductive in case
of suitable protective wiring); min. 10 V / 10 mA,
residual current at ambient temperature
Switching capacity of the auxiliary contacts: 45-46: 24 VDC / 2 A
