3
SRB 301LC/B
SRB 301LC/B-R
Operating instructions
Safety-monitoring module
EN
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
-LC/B-R:
fitting with 6 mm distance for U
B
= 32 VDC
and T
u
= 50 °C: residual current = 18 A,
without distance 6 A
Switching capacity of the auxiliary contacts:
41-42: 24 VDC / 2 A
Fuse rating of the safety contacts:
6 A slow blow
Recommended fuse for the auxiliary contacts:
2 A slow blow
Utilisation category to IEC/EN 60947-5-1:
AC-15 / DC-13:
EN 60947-5-1:2007
Dimensions H x W x D:
100 mm x 22.5 mm x 121 mm
The data specified in this manual are applicable when the component is
operated with rated operating voltage U
e
±0%.
2.5 Safety classification
Standards:
ISO 13849-1, IEC 61508, IEC 62061
PL:
up to e
Control category:
up to 4
DC:
99% (high)
CCF:
> 65 points
PFH value:
≤ 2.00 × 10
-8
/h
SIL:
up to 3
Service life:
20 years
The PFH value of 2.00 × 10
-8
/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. At 365 operating days per
year and a 24-hours operation, this results in the below-mentioned
switching cycle times (t
cycle
) for the relay contacts.
Diverging applications upon request.
Contact load
n
op/y
t
cycle
20 %
525,600
1.0 min
40 %
210,240
2.5 min
60 %
75,087
7.0 min
80 %
30,918
17.0 min
100 %
12,223
43.0 min
3. Mounting
3.1 General mounting instructions
Mounting: snaps onto standard DIN rails to EN 60715.
Snap the bottom of the enclosure slightly tilted forwards in the DIN rail
and push up until it latches in position.
To avoid EMC disturbances, the physical ambient and
operational conditions at the place where the product is
installed, must meet the provisions laid down in the paragraph
"Electromagnetic Compatibility (EMC)" of EN 60204-1.
3.2 Dimensions
All measurements in mm.
Device dimensions (H/W/D): 100 x 22.5 x 121 mm
4. Electrical connection
4.1 General information for electrical connection
As far as the electrical safety is concerned, the protection
against unintentional contact of the connected and therefore
electrically interconnected apparatus and the insulation of the
feed cables must be designed for the highest voltage, which
can occur in the device.
The electrical connection may only be carried out by
authorised personnel in a de-energised condition.
Wiring examples: see appendix
5. Operating principle and settings
5.1 LED functions
• K1: Status channel 1
• K2: Status channel 2
• U
B
: Status operating voltage (LED is on, when the operating voltage
on the terminals A1-A2 is ON)
• U
i
: Status internal operating voltage (LED is on, when the operating
voltage on the terminals A1-A2 is ON and the fuse has not been
triggered).
5.2 Description of the terminals
Voltages: A1
A2
+ 24 VDC/24 VAC
0 VDC/24 VAC
Inputs:
S11-S12
S11-S22
Input channel 1 (+)
Input channel 2 (+)
Outputs:
13-14
23-24
33-34
First safety enabling circuit
Second safety enabling circuit
Third safety enabling circuit
Start:
X1-X2
41-42
Feedback circuit and external reset
Auxiliary NC contact as signalling contact
U
B
U
i
K1
K2
33 23 13 41
X1 S12 S11 A1
X2 S22S21 A2
34 24 14 42
SRB
301
LC/B
U
B
U
i
K1
K2
SRB
301
LC/B-R
33 23 13
X1 S12 S11
41
A1
34 24 14
X2S22S21
42
A2
Fig. 1
Fig. 2
5.3 Notes
Signalling outputs must not be used in safety circuits.
6. Set-up and maintenance
6.1 Functional testing
The safety function of the safety-monitoring module must be tested.
The following conditions must be previously checked and met:
1. Correct fixing
2. Check the integrity of the cable entry and connections
3. Check the safety-monitoring module's enclosure for damage.
4. Check the electrical function of the connected sensors and their
influence on the safety-monitoring module and the downstream
actuators
6.2 Maintenance
A regular visual inspection and functional test, including the following
steps, is recommended:
1. Check the correct fixing of the safety-monitoring module
2. Check the cable for damages
3. Check electrical function
