Siemens SIMATIC S5-115U, User Manual

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S5-115U Manual Analog Value Processing
10.5.1 Connecting Transducers to the 466-3LA11 Analog Input Module
The pin assignments of the 466-3LA11 analog input module depend on the type of measurement
(common-reference measurement or differential measurement).
Common-reference Measurement
Figure 10-18. Pin Assignments of the 466 Analog Input Module in the Case of
Common-Reference Measurement
In the case of common-reference measure-
ment, all signal lines have a common refe-
rence point. The reference point is pro-
duced by running all M - inputs to one
point (see Figure 10-18).
Since this type of measurement is sus-
ceptible to noise, the signal sources should
be located close to the 466 analog input
module.
There are 16 channels available; unused
channels must be short-circuited (jumper
between M+ and M -).
Labelling and Grouping of Channels
The channels are labelled as follows on the
module:
Channel 0:
M0+
M0 -
Channel 1: M1+
M1 -
: :
Channel 15: M15+
M15 -
The channels are arranged in groups of
four, for which separate measuring ranges
can be set:
Channel group I:
Channel 0 to 3
Channel group II: Channel 4 to 7
Channel group III: Channel 8 to 11
Channel group IV: Channel 12 to 15
1
2
M0+
3 M0-
4 M8-
5 M8+
6
7
M1+
8 M1-
9 M9-
10 M9+
11
12
M2+
13 M2-
14 M10-
15 M10+
16
17
M3+
18 M3-
19 M11-
20 M11+
21
22
23
24
M4+
25 M4-
26 M12-
27 M12+
28
29
M5+
30 M5-
31 M13-
32 M13+
33
34
M6+
35 M6-
36 M14-
37 M14+
38
39
M7+
40 M7-
41 M15-
42 M15+
43
EWA 4NEB 811 6130-02b
10-29