Analog Modules
5-83
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
5.19.1 Commissioning the SM 431; AI 8 14 Bit
You set the mode of operation of the SM 431; AI 8 14 Bit by means of
measuring range modules on the module and in STEP 7.

Measuring Range Module

A measuring range module of the module matches two channels and one
resistance channel to each type of sensor. If necessary, the measuring range
modules must be replugged to change the measuring method and the measuring
range. The steps you have to perform to do this are described in detail in
Section 5.4.
The corresponding table in Section 5.19.2 tells you which assignment you have to
select for which measuring method and measuring range. In addition, the
necessary settings are embossed on the module.
Parameter
You will find a description of the general procedure for assigning parameters to
analog modules in Section 5.7.
An overview of the parameters that you can set and their default settings are
shown in the table below.
Table 5-51 Parameters of the SM 431; AI 8 14 Bit
Parameter Value Range Default1Parameter
Type Scope
Diagnostics
•Wire break Yes/no No Static Channel
Measurement
•Measuring type Disabled
U Voltage
4DMU Current (four-wire transmitter)
2DMU Current (two-wire transmitter)
R-4L Resistance (four-conductor
terminal)
R-3L Resistance (three-conductor
terminal)
RTD-4L Thermal resistor
(linear, four-conductor terminal)
RTD-3L Thermal resistor
(linear, three-conductor
terminal)
TC-L Thermocouple (linear)
U
Static Channel
•Measuring
range Refer to Section 5.19.2 for the
measuring ranges of the input channels
that you can set.
" 10 V
•Reference
Temperature – 273.15 to 327.67 oC0,00 oCDynamic Module