Siemens S5-135U/155U System Manual page 458

Analog Input/Output Modules
Front Connector
Assignments
Voltage or current input
or connection of two-wire transducer
Connection of Front Strip
Process Signal
Pin
Lines
F+
1
F–
2
L+
3
4
+ CH.0
5
–
1)
6
+
–
7
1)
8
+
–
1) 9
10
+
11
1) –
13
+
1) –
14
15
+
1) –
16
17
+
1)
– 18
19
+
1) –
20
22
Comp.–
23
Comp.+
24
3)L+
25
+
–
1)
26
27
+
–
1)
28
29
+
–
1)
30
31
+
–
32
1)
34
+
MU –
35
L+
2)
36
L–
+
MU –
37
2)
38
+
MU
–
39
2)
40
+
MU
41
–
2)
42
L–
0 Vgnd (L–)
CH.15
Figure 9-25 Front Connector Assignments
Two-wire transducers can only be connected in the 500 mV mode.
Connect L- to the central ground point (reference potential).
1)
2)
3)
9-76
Block Diagram Connection of
of the Module Process Signal
Lines
F+
t
F–
L+
ADU
I
trip
Comp.–
Comp.+
3) L+
L–
Observe permissible potential difference between sensor and reference potential of modules
or between sensors.
Two-wire transducer
Only required to switch off the tripping current without broken wire detection;
(0 V at common ground point with L-).
Resistance thermometer
Front Strip Block Diagram
of the Module
Pin
1
t
2
3
4
CH.0
5
6
CH.1
7
8
ADU
CH.2
9
10
CH.3
11
13
CH.4
14
15
CH.5
16
17
CH.6
18
19
CH.7
20
I
trip
22
23
24
25
CH.0
26
27
CH.1
28
29
CH.2
30
31
CH.3
32
34
CH.4
35
36
CH.5
37
38
CH.6
39
40
CH.7
41
42
0 Vgnd (L–)
C79000-G8576-C199-06
System Manual