schmersal SRB-E-204ST - Application Example

8
Operating instructions
Safety-monitoring module
SRB-E-204ST / SRB-E-204PE
EN
7.2 Application example
Dual-channel control, shown for a guard door monitor with two position switches where one has a positive break contact;
with external reset button
J
• Relay outputs: Suitable for 2-channel control, for increase in capacity or number of contacts by means of contactors or relays
with positive-guided contacts
• H2 = Feedback circuit
Signalling outputs must not be used in safety circuits.
Wiring example SRB-E-204ST
0V / GND
X3A1 S22S11
A2
S21 X2
Q1 Q2Y1
S12
+24VDC
K
A
K
B
K
A
K
B
F1
S42S31S41 S32
K
A
K
B
S51S52 S61S62S72 S82
Y2 Y3 Y4
R
H2
a)
b)
c)
d)
e)f)
d)
a) a)
d) d)
a)
Wiring example SRB-E-204PE
0V / GND
X3A1 S22S11
A2
S21 X2
Q1 Q2Y1
S12
+24VDC
F1
S42S31S41 S32 S51S52 S61S62S72 S82
Y2 Y3 Y4
a)
b)
c)
d)
e)f)
d)
a) a)
d) d)
a)
g)
Key
a) Safety inputs
b) Safety outputs
c) Signalling outputs
d) Clock outputs
e) Processing
f) Power
g) Safety modules
Safe signal processing, e.g. by PROTECT SRB-E-series
with start and reset functions as well as feedback circuit monitoring.