Siemens Simatic M7-400 Reference Manual page 346

Analog Modules
5.24 Analog Input Module SM 431; AI 8
(6ES7431-7KF00-0AB0)
Characteristics
The analog input module SM 431; AI 8  16 Bit has the following features:
• 8 isolated differential inputs for voltage/current/temperature measurement
• Unlimited measuring range selection
• Linearization of the thermocouple characteristic curves
• 16-bit resolution
• Programmable diagnostics
• Programmable diagnostic interrupt
• Programmable hardware interrupt when limit has been exceeded
• Analog section isolated from CPU
• The maximum permissible common mode voltage between the channels and
between the channel and the central ground point is 120 VAC
• Internal measured resistance
• Field connection (6ES7431-7K00-6AA0) with internal reference temperature
(included with the product)
Calibration Software
The analog input module SM 431; AI x 16 Bit; (6ES7431-7KF00-0AB0) is delivered
with the software "S7-400 Thermocouple User Calibration" on two diskettes. After
installing the software, you can define user–specific calibration values for each
channel and and each module input range. You will find further information under
ID 12436891 at the Customer Support FAQ site.
5-130
S7-400, M7-400 Programmable Controllers Module Specifications
16 Bit;
A5E00069467-07