Signal Modules of the S7-400
3-8
Automation System S7-400 Configuration and Use
A5E0044271 1-02
Performance Characteristics of the Analog Modules
Table 3-2 provides an overview of the performance characteristics of the S7-400
analog modules.
Table 3-2 Performance Characteristics of the Analog Modules
Module
Performance characteristics
Analog input module SM 431
AI 8 x 13 Bit
6ES7431-1KF0x-0AB0
All-purpose and easy to use module which is suffic ient for many
automation technology applications.
• 8 inputs for voltage/current measurement
• 4 inputs for resistance measurement
• Different measuring ranges can be set simultaneously
• 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
encoders and M
ANA
30 V AC.
AI 8 x 14 Bit
6ES7431-1KF1x-0AB0
All-purpose module which can be used for all measuring ranges (U, I,
R, RTD, TC). Suitable for applications which rely on Common Mode
Voltage (UCM) which occur for example, in plants spread out over a
large area.
• 8 inputs for voltage/current measurement
• 4 inputs for resistance and temperature measurement
• Different measuring ranges can be set simultaneously
• 14-bit resolution
• Especially suitable for measuring temperatures
• Temperature encoder types can be configured
• Linearization of the encoder characteristic curves
• Power supply: 24 V DC required only for the connection of 2-wire
transmitters
• Analog section isolated from CPU
• The maximum permissible common mode voltage between the
channels and between the channel and the c entral ground point
is 120 V AC.
AI 8 x 14 Bit
with rapid A/D changeover
6ES7431-1KF2x-0AB0
• Rapid A/D changeover, therefore particularly suitable for highly
dynamic processes
• 8 inputs for voltage/current measurement
• 4 inputs for resistance measurement
• Different measuring ranges can be set simultaneously
• 14-bit resolution
• Power supply: 24 V DC required only for the connection of 2-wire
transmitters
• Analog section isolated from CPU
• The maximum permissible common mode voltage between the
channels and between the reference potential of the connected
encoders and M
ANA
8VAC.
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