3
SRB301HC/T-24V
SRB301HC/T-230V
Operating instructions
Safety-monitoring module
EN
Switching capacity of the safety contacts:
13-14; 23-24; 33-34:
max. 250 V, 8 A ohmic (inductive in case
of appropriate protective wiring);
min. 10 V / 10 mA
Switching capacity of the auxiliary contacts:
41-42: 24 VDC / 2 A
Protection of the safety contacts
:
external (I
k
= 1000 A)
to EN 60947-5-1
Safety fuse 10 A quick blow, 8 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
Current and voltage at the control circuits:
- S13-S14:
24 VDC, start impulse: 80 mA / 120 ms;
continuous current: 20 mA
- S23-S24:
24 VDC / 20 mA
- X1-X2:
24 VDC, start impulse: 80 mA / 120 ms
Utilisation category to EN 60947-5-1:
AC-15: 230 V / 3 A
DC-13: 24 V / 2 A
Dimensions (H/W/D):
100 mm x 45 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:
EN ISO 13849-1, IEC 61508, EN 60947-5-1
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 cy-
cles (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.
3.2 Dimensions
All measurements in mm.
Device dimensions (H/W/D): 100 x 45 x 121 mm
with plugged-in terminals: 120 × 45 × 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
To avoid EMC disturbances, the physical ambient and opera-
tional conditions at the place where the product is installed,
must meet the provisions laid down in the paragraph "Electro-
magnetic Compatibility (EMC)" of DIN EN 60204-1.
5. Operating principle and settings
5.1 LED functions
• ON: supply voltage is on. / OFF: supply voltage missing, short-circuit
between inputs S13-S14, S23-S24, internal power supply error
• IN A: ON: input S13-S14 closed / OFF: input S13-S14 open or wire
breakage
• IN B: ON: input S23-S24 closed / OFF: input S23-S24 open or wire
breakage
• OUT: ON: both internal relays are interconnected, when S13-S14 and
S23-S24 are closed and the feedback circuit is closed /
OFF: when the inputs S13-S14 or S23-S24 or the feedback circuit
are/is not closed
5.2 Description of the terminals
Voltages:
A1
A2
+24 VDC / 24 VAC / 48 … 230 VAC
0 VDC / 0 VAC
Inputs:
S13-S14
S23-S24
Input channel 1 (+)
Input channel 2 (-)
Outputs:
13-14
23-24
33-34
41-42
First safety enabling circuit (stop 0)
Second safety enabling circuit (STOP 0)
Third safety enabling circuit (stop 0)
Auxiliary NC contact as signalling contact
Feedback
circuit:
X1-X2
Start:
X1-X2
Manual start (reset button)
5.3 Notes
Signalling outputs must not be used in safety circuits.
ON
IN A
IN B
OUT
A1 S13 S24 X1
A2 S14 S23 X2
41
23
13
33
42
24
14
34
SRB 301HC/T
...V
Fig. 1
