3
SRB 202CS / SRB 202CS/T / SRB 202CA/T /
SRB 202CA/QT / SRB 202CA / SRB 202CA/Q
Operating instructions
Safety-monitoring module
EN
Outputs
Number of safety contacts:
2
Number of auxiliary contacts:
2
Switching capacity of the
safety contacts:
13-14; 13-24:
max. 250 V, 6 A ohmic (inductive in
case of appropriate protective wiring)
max. residual current 6 A
Switching capacity of
the auxiliary contacts:
31-32, 31-42:
24 VDC / 2 A
Fuse rating of the
safety contacts
6.3 A slow blow
Recommended fuse
for the auxiliary contacts
2 A slow blow
Utilisation category to
EN 60947-5-1:
AC-15: DC-13: EN 60947-5-1:2007
Dimensions (H/W/D):
100 mm x 22.5 mm x 121 mm
The data specified in this manual is 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:
Stop 0: up to e
Control category:
Stop 0: up to 4
DC:
Stop 0: 99% (high)
CCF:
> 65 points
SIL:
Stop 0: up to 3
Service life:
20 years
B
10d
value (for one channel):
Low voltages range 20%: 20,000,000
40%: 7,500,000
60%: 2,500,000
80%: 1,000,000
Maximum load 100%: 400,000
MTTF
B
d x
x
h
s/h
3600
d
10d
op
op
op
n
0,1 x n
op
t
cycle
For an average annual demand rate of n
op
= 126,720 cycles per year,
Performance Level PL e can be obtained at maximum load.
n
op
= average number of activations per year
d
op
= average number of operating days per year
h
op
= average number of operating hours per day
t
cycle
= average demand rate of the safety function in s
(e.g. 4 × per hour = 1 × per 15 min. = 900 s)
(Specifications can vary depending on the application-specific
parameters h
op
, d
op
and t
cycle
as well as the load.)
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 22.5 x 121 mm
with plugged-in terminals: 120 × 22.5 × 121 mm
4 Electrical connection
4.1 General information for electrical connection
Wiring examples: see appendix
The electrical connection may only be carried out
by authorised personnel in a de-energised condition.
5 Operating principle and settings
5.1 LED functions
• K1: Status channel A
• K2: Status channel B
• K3: Status channel C
• K4: Status channel D
• 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
0 VDC
Inputs:
S12
S22
S31-S32
S41-S42
S43-S44
Switch-off level 1, input channel 1
Switch-off level 2, input channel 2
Switch-off level 2, input channel 1
Switch-off level 2, input channel 2
(SRB 202CS, 202CS/T)
Switch-off level 2, input channel 2
(SRB 202CA, SRB 202CA/T,
SRB 202CA/Q, SRB 202CA/QT)
Outputs:
13-14
13-24
31-32
31-42
First safety enabling circuit (stop 0),
switch-off level 1
Second safety enabling circuit (stop 0),
switch-off level 2
Auxiliary NC contact, switch-off level 1
(must not be used in safety circuits)
Auxiliary NC contact, switch-off level 2
(must not be used in safety circuits)
Start:
X1
X2
Feedback circuit, manual start (reset button),
automatic start, switch-off level 1
Feedback circuit, manual start (reset button),
automatic start, switch-off level 2
UB
Ui
K1
K2
K3
K4
24 14 13 31
X1
S32 S42
S41
X2 A2
S31
32 42
S22 S12 A1
SRB
202
…*
Fig. 1
