Product Description
Key Features
- Isolated analog input capacity: SM 431 provides 8 isolated analog inputs; 8 are available for voltage/current measurement and 4 for resistance measurement.
- Supported input types: Inputs support voltage, current, thermocouple, resistance thermometer and resistance measurement, including Pt100.
- Resolution and conversion: Resolution is 14 bit with overrange, including sign; with activated filtering, resolution is 16 bit. Basic conversion time is 20.1 / 23.5 ms.
- Supply and current limits: Load voltage L+ is rated at 24 V DC and is required only for supplying 2-wire transmitters. Maximum current from L+ without load is 200 mA for 8 connected, fully controlled 2-wire transmitters; maximum backplane bus current is 600 mA.
- Signal encoder connections: Supports voltage measurement, 2-wire and 4-wire current measurement, and 2-wire, 3-wire and 4-wire resistance measurement.
- Product lifecycle: Product lifecycle: Announcement of product phase-out.
Applications
- Voltage measurement: The module supports voltage measurement through its analog inputs.
- Current measurement: The module supports current measurement with 2-wire and 4-wire transducers.
- Resistance and temperature measurement: The module supports resistance measurement, resistance thermometers including Pt100, and thermocouples.
Technical Summary
| Product | 6ES7431-1KF10-0AB0 |
|---|---|
| Product family | SIMATIC S7-400, analog input SM 431 |
| Analog inputs | 8 isolated AI |
| Resolution | 14 bit with overrange; 16 bit with activated filtering |
| Load voltage L+ | 24 V DC; only required for supplying 2-wire transmitters |
| Input ranges | Voltage, current, thermocouple, resistance thermometer and resistance |
| Signal encoder connections | Voltage; current as 2-wire or 4-wire transducer; resistance with 2-wire, 3-wire or 4-wire connection |
| Product lifecycle | Announcement of product phase-out |
Frequently Asked Questions
What is the exact order number of this analog input module?
The exact order number is 6ES7431-1KF10-0AB0.
How many analog inputs does the module have?
It has 8 isolated analog inputs.
Which signal encoder connections are supported?
It supports voltage measurement, current measurement with 2-wire or 4-wire transducers, and resistance measurement with 2-wire, 3-wire or 4-wire connections.
What lifecycle information is supplied for this model?
The supplied product lifecycle is Announcement of product phase-out.
