3
SRB402EM
SRB402EM/CC
Operating instructions
Output expander module
EN
Dimensions H x W x D:
SRB402EM: 120 × 22.5 × 121 mm
SRB402EM/CC: 130 × 22.5 × 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:
≤ 2.0 x 10
-8
/h
SIL:
up to 3
Service life:
20 years
The PFH value of 2.0 × 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.
3.2 Dimensions
All measurements in mm.
Device dimensions (H/W/D):
SRB402EM: 120 × 22.5 × 121 mm
SRB402EM/CC: 130 × 22.5 × 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/K2: status channels 1 and 2
5.2 Description of the terminals
Voltages: A1
A2
+24 VDC/24 VAC
0 VDC/24 VAC
Outputs: 13-14
23-24
33-34
43-44
51-52
61-62
First safety enabling circuit
Second safety enabling circuit
Third safety enabling circuit
Fourth safety enabling circuit
Auxiliary NC contact as signalling contact
Auxiliary NC contact as signalling contact
Start:
X1-X2
Feedback circuit
Signalling outputs must not be used in safety circuits.
K1/K2
SRB
402EM
13 23 33 43
A1 X1 51 61
14 24 34 44
A2 X2 52 62
Fig. 1
