Product Overview
Technical Summary
| Product designation | SIMATIC S7-400, analog input SM 431 |
|---|---|
| Analog inputs | 8 isolated AI |
| Resolution | 14 bit; with activated filtering: 16 bit |
| Input types | Voltage, current, resistance, thermocouple, resistance thermometer, Pt100 |
| Rated load voltage L+ | 24 V DC; only required for supplying 2-wire transmitters |
| Voltage input ranges | 1 V to 5 V; -1 V to +1 V; -10 V to +10 V; -2.5 V to +2.5 V; -250 mV to +250 mV; -5 V to +5 V; -500 mV to +500 mV; -80 mV to +80 mV |
| Current input ranges | 0 to 20 mA; 4 mA to 20 mA |
| Basic conversion time | 20.1 / 23.5 ms |
Key Features
- Product designation: SIMATIC S7-400, analog input SM 431 with isolated 8 AI and 14-bit resolution.
- Supported input types: Voltage, current, resistance, thermocouple, resistance thermometer, and Pt100 input ranges.
- Supply: Rated load voltage L+: 24 V DC; only required for supplying 2-wire transmitters. Reverse polarity protection: Yes.
- Measurement capacity: 8 analog inputs for voltage/current measurement and 4 analog inputs for resistance measurement.
- Signal connection: Supports voltage measurement, 2-wire and 4-wire current measurement, and 2-wire, 3-wire, and 4-wire resistance measurement.
- Product lifecycle: Announcement of product phase-out.
Frequently Asked Questions
What does Siemens 6ES7431-1KF10-0AB0 identify?
It identifies a SIMATIC S7-400 SM 431 analog input module with isolated 8 AI and 14-bit resolution.
Which specifications distinguish this MLFB variant?
Check the isolated 8 AI, 14-bit resolution, supported voltage/current/resistance/thermocouple/Pt100 inputs, and complete order number.
What connection types are supported?
Voltage measurement, 2-wire and 4-wire current measurement, and 2-wire, 3-wire, and 4-wire resistance measurement are supported.
What details are needed for a quotation?
Provide the complete 6ES7431-1KF10-0AB0 order number, required quantity, and destination.
