Siemens SIMATIC S5-100U System Manual page 280

Analog Value Processing
Additional operating mode switch selections possible with analog module 464-8MA21:
Linearization: With this function, you can obtain a characteristic linearization of the thermo-
couples of type J, K, and L or of the resistance thermometer PT 100. With module
464-8MA21, the linearization must always be activated together with the
corresponding compensation of the reference point temperature.
Thermocouples:
Type J: - 200° C to +1200° C
Type K: - 200° C to +1369° C
Type L: - 199° C to + 900° C
Temperature For the thermocouples of type J, K, and L, you can compensate, on the one hand,
compensation: the temperature of the reference point using a compensating box.
(See Figure 11-1). On the other hand, it is possible to move the reference point to
the front of the module by activating the "temperature compensation" function.
When thermocouples are directly connected, an internal circuit on the module
causes the digital value "0" to be displayed independently of the temperature of
the terminal when the temperature at the measuring junction is 0° C (32° F). In
order to accomplish this, the terminals of the sensors have to be connected
directly to the module, i.e., without a copper extension cable.
Table 11-2. Operating Mode Switch Settings for Analog Input Module 464-8MA21
Function
Power supply
frequency
Operation
Wire break
11-8
(-328° F to 2192° F)
(-328° F to 2497° F)
(-326° F to 1652° F)
Settings for Operating Mode Switch
50 Hz
8
7
6
5
4
3
2
1
1 channel 2 channels (channel 0
(channel 0)
8
7
6
5
4
3
2
1
With wire break signal
8
7
6
5
4
3
2
1
in steps each of 1° C (1.8° F)
60 Hz
4 channels (channel 0
and channel 1)
8
7
6
5
4
3
2
1
No wire break signal
EWA 4NEB 812 6120-02b
S5-100U
8
7
6
5
4
3
2
1
- channel 3)
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1