Signal Modules of the S7-400
3-9
Automation System S7-400 Configuration and Use
A5E0044271 1-02
Table 3-2 Performance Characteristics of the Analog Modules, continued
Module Performance characteristics
AI 16 x 13 Bit
6ES7431-0HHxx-0AB0
Simple module for current and voltage measurement, offers high
channel density at a very low channel price.
• 16 inputs for voltage/current measurement
• Different measuring ranges can be set simultaneously
• 13-bit resolution
• Analog section non-isolated from CPU
• The maximum permissible common mode voltage between the
channels and the reference potentials of the connected encoders
and central ground point is 2 V AC/DC.
AI 16 x 16 Bit
6ES7431-7QHxx-0AB0
Can be used univerally due to its ability to cover all measuring ranges
(U, I, R, RTD, TC). Suitable for applications requiring higher and
highest precision and resolution, for example, in process engineering
plants.
• 16 inputs for voltage/current and temperature measurement with
thermocouples (TC)
• 8 inputs for resistance and temperature measurement with
resistance thermometers (RTD)
• Different measuring ranges can be set simultaneously
• 16-bit resolution
• Programmable diagnostics
• Programmable diagnostic interrupt
• Programmable interrupt for limit violation
• Programmable end-of-cycle interrupt
• 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 RTD x 16 Bit
6ES7431-7KF1x-0AB0
Special module for temperature acquisition via resistance
thermometer (RTD). Very h igh precision and resolution with a short
basic conversion time (25 ms for all 8 channels) allow it to be used
even in high-speed processes.
• 8 differential inputs for the resistance thermometer
• Programmable resistance thermometer
• Linearization of the resistance thermometer characteristic curves
• 16-bit resolution
• Update rate of 25 ms for 8 channels
• Programmable diagnostics
• Programmable diagnostic interrupt
• Programmable interrupt for limit violation
• Analog section isolated from CPU
• The maximum permissible common mode voltage between the
channel and the central ground point is 120 V AC.
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