
Analog modules
5.2 Module overview
S7-400 Automation System Module Data
180 Reference Manual, Edition 09/2009, A5E00850736-06
5.2 Module overview
Features of the analog modules
The tables below summarize the essential properties of the analog modules. This overview
supports you in selecting a module to suit your requirements.
Table 5- 1 Analog input modules: overview of features
Features SM 431;
AI 8 x 13 bit
(-1KF00-)
SM 431;
AI 8 x 14 bit
(-1KF10-)
SM 431;
AI 8 x 14 bit
(-1KF20-)
SM 431;
AI 16 x 13
bit
(-0HH0-)
SM 431;
AI 16 x 16
bit
(-7QH00-)
SM 431;
AI 8 x
RTD 16 bit
(-7KF10-)
SM 431;
AI 8 x 16 bit
(-7KF00-)
Number of inputs 8 AI for U/I
measure-
ment
4 AI for
resistance
measure-
ment
8 AI for U/I
measure-
ment
4 AI for
resistance/
temperature
measure-
ment
8 AI for U/I
measure-
ment
4 AI for
resistance
measure-
ment
16 inputs 16 AI for U/I/
temperature
measure-
ment
8 AI for
resistance
measure-
ment
8 inputs 8 inputs
Resolution 13 bits 14 bits 14 bits 13 bits 16 bits 16 bits 16 bits
Measuring method Voltage
Current
Resistance
Voltage
Current
Resistance
Tempera-
ture
Voltage
Current
Resistance
Voltage
Current
Voltage
Current
Resistance
Tempera-
ture
Resistance Voltage
Current
Tempera-
ture
Measuring principle Integrating Integrating Instantane-
ous value
encoding
Integrating Integrating Integrating Integrating
Programmable
diagnostics
No No No No Yes Yes Yes
Diagnostic interrupt No No No No Adjustable Yes Yes
Limit value
monitoring
No No No No Adjustable Adjustable Adjustable
Hardware interrupt
when limit exceeded
No No No No Adjustable Adjustable Adjustable
Hardware interrupt at
end of scan cycle
No No No No Adjustable No No
Voltage relationships Analog section isolated from CPU Electrical
isolation
Analog section isolated from CPU
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