2
Operating instructions
Safety-monitoring module
SRB303SQP-SS
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 ISO 13856-2
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:
SRB303SQP-SS-
➀➁
No. Option
Description
➀
Plug-in screw clamps: single wire (rigid)
or fine wire (flexible): 0.2 … 2.5 mm²;
fine wire with ferrule: 0.25 … 2.5 mm²
CC
Plug-in cage clamps: single wire (rigid)
or fine wire (flexible): 0.2 … 1.5 mm²;
fine wire with ferrule: 0.25 … 1.5 mm²
PC
Screw clamps: single wire (rigid)
or fine wire (flexible): 0.2 … 2.5 mm²;
fine wire with ferrule: 0.25 … 2.5 mm²
➁
24V
24 VAC/DC
230V
230 VAC
115V
115 VAC
Only if the action described in these operating instructions is
carried out correctly will the safety function be safeguarded,
including compliance with the Machinery Directive.
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 safety edges of the series STW-SL.
The safety function is defined as deactivating outputs 13-14, 23-24 and
33-34 after actuation of the safety edge. The safety-relevant current
paths with the outputs contacts 13-14, 23-24 and 33-34 meet the
following requirements under observation of a PFH value assessment
(also refer to chapter 2.5 "Safety classification"):
• Control category 3 - PL e to ISO 13849-1
• SIL 3 to IEC 61508-2
• SILCL 3 to IEC 62061
To determine the Performance Level (PL) to ISO 13849-1 of the entire
safety function (e.g. sensor, logic, actuator), an assessment of all
relevant components is required.
The entire concept of the control system, in which the
safety component is integrated, must be validated to the
relevant standards.
2.4 Technical data
General data:
Standards:
EN 60204-1, IEC 60947-5-1; ISO 13849-1,
IEC 62061, IEC 61508
EMC rating:
to EMC Directive
Air clearances and creepage distances:
to IEC 60664-1
Mounting:
standard rail in accordance with IEC 60715
Terminal designations:
IEC 60947-1
Electrical characteristics:
Rated operating voltage U
e
:
24 VDC –15% / +20%,
residual ripple max. 10%,
24 VAC –15% / +10%,
115VAC / 230VAC VAC –15% / +6%
Frequency range:
50 Hz/60 Hz
Power consumption:
24V version: max. 3.0 W / 7.5 VA,
115V version: max. 6.5 VA,
230V version: max. 6.0 VA
Fuse rating for the operating voltage:
Internal electronic trip,
tripping current > 500 mA,
Reset after disconnection of supply voltage
Insulation values in accordance with IEC 60664-1:
Rated insulation voltage U
i
:
- Safety contacts:
250 V
Rated impulse withstand voltage U
imp
:
- Safety contacts 13-14, 23-24, 33-34:
4 kV
Overvoltage category:
III
Degree of pollution:
2
Pull-in delay for automatic start:
typ. 80 ms
Pull-in delay with reset button:
typ. 15 ms
Drop-out delay:
typ. 30 ms
Drop-out delay on "supply failure":
typ. 60 ms
Bridging in case of voltage drops:
typ. 40 ms
Control current circuits/inputs:
- Inputs 5, 6:
24 VDC / 5 mA
- Input X3:
24 VDC, start impulse 20 mA / 20 ms
- Input X4:
24 VDC / 25 mA
- Input S2 (with reset button):
24 VDC, start impulse 20 mA / 20 ms
- Input S2 (auto start):
24 VDC / 25 mA
Safety edge STW-SL:
Cable lengths:
0.2 m up to 24 m
Conduction resistance:
5 kΩ / m
Relay outputs:
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);
min. 10 V / 10 mA
Fuse rating of the safety contacts:
external (I
k
= 1000 A)
to IEC 60947-5-1
Safety fuse 8 A quick blow, 6.3 A slow blow
Utilisation category to IEC 60947-5-1:
AC-15: 230 VAC / 6 A
DC-13: 24 VDC / 6 A
Switching capacity of the auxiliary contacts:
41-42: 24 VDC / 2 A
51-52, 51-54: 24 VDC / 1 A
Fuse rating for the auxiliary contact:
external (I
k
= 1000 A)
to IEC 60947-5-1
41-42: Safety fuse 2.5 A quick blow, 2 A slow blow
51-52, 51-54: Safety fuse 1.25 A quick blow, 1 A slow blow
Electrical life:
Derating curve available on request
Mechanical life:
10 million operations
Safety contact values:
resistance max. 100 mΩ, AgSnO,
self-cleaning, positive action
Mechanical data:
Connection type:
refer to 2.1 Ordering code
Cable section:
refer to 2.1 Ordering code
Connecting cable:
rigid or flexible
Tightening torque for the terminals:
0.5 Nm
Material of enclosure:
glass-fibre reinforced thermoplastic, ventilated
Weight:
24V-version: 320 g
115 / 230V-version: 470 g
