Siemens Simatic S7-400 - Manual (Page 286)

Analog Modules
5-70
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
5.18 Analog Input Module SM 431; AI 8 13 Bit;
(6ES7431-1KF00-0AB0)
Characteristics
The analog input module SM 431; AI 8 13 Bit has the following features:
• 8 inputs for voltage/current measurement
• 4 inputs for resistance measurement
• Unlimited measuring range selection
• 13-bit resolution
• Analog section isolated from CPU
• The maximum permissible common mode voltage between the channels and
between the reference potential of the connected sensors and M
ANA
is 30 VAC