Product information
Overview
Key Features
- Isolated analog input capacity: Has 8 isolated analog inputs, with 8 inputs for voltage/current measurement and 4 for resistance measurement.
- Signal types: Supports voltage, current, thermocouple, resistance thermometer and resistance input ranges.
- Resolution: Resolution with overrange is 14 bit including sign; with activated filtering, resolution is 16 bit.
- Supply for 2-wire transmitters: Load voltage L+ rated value is 24 V DC, required only for supplying 2-wire transmitters. Reverse polarity protection: Yes.
- Signal encoder connections: Supports voltage measurement, 2-wire and 4-wire current measurement, and 2-wire, 3-wire and 4-wire resistance measurement.
- Installation and conversion: Shielded cable length is max. 200 m; 50 m with thermocouples and input ranges ≤ 80 mV. Basic conversion time is 20.1 / 23.5 ms.
Technical Summary
| Product type | SIMATIC S7-400 analog input SM 431 |
|---|---|
| Analog inputs | 8 isolated AI |
| Resolution | 14 bit; 16 bit with activated filtering |
| Input signal types | Voltage, current, thermocouple, resistance thermometer and resistance |
| Load voltage L+ | 24 V DC; only required for supplying 2-wire transmitters |
| Input ranges | 1 V to 5 V, -10 V to +10 V, 0 to 20 mA, 4 mA to 20 mA and additional ranges |
| Conversion time | 20.1 / 23.5 ms basic conversion time |
| Potential separation | Between analog inputs and backplane bus; between analog inputs and load voltage L+ |
| Product lifecycle | Announcement of product phase-out |
Frequently Asked Questions
What is the exact product type and input capacity?
It is the Siemens SIMATIC S7-400 analog input SM 431, order number 6ES7431-1KF10-0AB0, with 8 isolated analog inputs.
Which input signals does 6ES7431-1KF10-0AB0 support?
It supports voltage, current, thermocouple, resistance thermometer and resistance input ranges.
What supply is required for 2-wire transmitters?
Load voltage L+ is 24 V DC and is required only for supplying 2-wire transmitters.
What cable length is supported?
Shielded cable length is max. 200 m; it is 50 m with thermocouples and input ranges ≤ 80 mV.
Can you quote this item for my requirement?
Send the required quantity, destination and project-list context for a model-specific quotation.
