Leuze electronic
MSI-TB
10
a
Start/active
b
Active
c
Transmitter
d
Receiver
e
Reset
f
Operation with start/restart interlock
g
Operation without start/restart interlock
h
EDM (contactor monitoring, feedback circuit)
i
Output Signal Switching Device OSSD
j
Secondary switching device SSD
k
Indication output Safety On
l
Indication output Error
Figure 3.3: Structure of the complete safety system
Device versions:
MSI-TR1B: standard safety monitoring device for type-2 sensors.
MSI-TR2B: safety monitoring device with extended filter time (switches only after a continuous inter
-
ruption > 130 ms; ignores small parts).
MSI-TSB: safety monitoring device with STOP1 function.
The display elements of the safety relay simplify the start-up and fault analysis.
0V
Var. B
Var. A
+2
4
V
State
Er
ro
r
MSI-TB
activ
e
Receiver
0V
+
24V
RE
S
reset
Error
ac
ti
v
e
St
a
rt
w/
o
R
E
S
-K1
-K2
5
-A3
6
14 15
22
21
13
7
8
30
32
24
29
31
23
-K2
-K1
-K1
-K2
A1
A2
-K1
A1
A2
-K2
1
2
1
2
4
4
3
-A2
1
16
0V
+ 24V
PE
L+
L+
+ 24V
0V
PE
L-
L-
3
1
Transmitter
-A1
a
b
d
c
f
e
h
g
j
j
i
i
l
k
+2
4
V
0V
*
*
Figure 3.4: MSI-TR1B
Figure 3.5: MSI-TR2B
Figure 3.6: MSI-TSB
