Analog Modules
4-157
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Connection of the sensor
• For measuring voltage Possible
• For measuring current
As two-wire transmitter
As four-wire transmitter
Possible
Possible
•
For measuring
resistance
With two-conductor
connection
With three-conductor
connection
With four-conductor
connection
Possible
Possible
Possible
• Load of the two-wire
transmitter
max. 820 Ω
Characteristic linearization
• for thermocouples
Parameters can be
assigned
Type E, N, J, K, L
• For RTD Pt 100
(standard, climate range)
Ni 100
(standard, climate range)
Temperature compensation Parameters can be
assigned
• Internal temperature
compensation
Possible
• External temperature
compensation with
compensating box
Possible
• Compensation for 0 C
comparison point
temperature
Possible
• Technical unit for
temperature
measurement
Degrees Celsius
4.25.1 Commissioning the SM 331; AI 2 x 12 bits
You set the mode of operation of the SM 331; AI 2 x 12 bits by means of a
measuring range module on the module and in STEP 7.
Measuring range module
If necessary, the measuring range module 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 4.4.
The corresponding table in Section 4.25.2 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.
Default settings for measuring range module
The measuring range module is preset to “B” (voltage; " 10 V) when the module
is supplied.
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