Product Description
Key Features
- 8 isolated analog inputs: The SM 431 has 8 analog inputs, with 8 for voltage/current measurement and 4 for resistance measurement.
- 13-bit resolution: Resolution with overrange, including sign, is 13 bit maximum.
- Supported input ranges: Voltage ranges include 1 V to 5 V, -1 V to +1 V and -10 V to +10 V; current ranges include -20 mA to +20 mA and 4 mA to 20 mA; resistance range is 0 to 600 ohms.
- Signal encoder connections: Connections are supported for voltage measurement, 2-wire and 4-wire current measurement, and 2-wire, 3-wire and 4-wire resistance measurement.
- Backplane bus current: Input current from the backplane bus is 350 mA maximum at 5 V DC.
- Lifecycle status: 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 transducers with external transmitter supply and with 4-wire transducers.
- Resistance measurement: The module supports resistance measurement with 2-wire, 3-wire and 4-wire connections.
Technical Summary
| Product | Siemens 6ES7431-1KF00-0AB0 |
|---|---|
| Family | SIMATIC S7-400, analog input SM 431, isolated 8 AI, resolution 13 bit, U/IResistor |
| Analog inputs | 8 |
| Voltage input ranges | 1 V to 5 V; -1 V to +1 V; -10 V to +10 V |
| Current input ranges | -20 mA to +20 mA; 4 mA to 20 mA |
| Resistance input range | 0 to 600 ohms; usable up to 500 ohms |
| Resolution | 13 bit maximum, with overrange including sign |
| Input current | 350 mA maximum from backplane bus 5 V DC |
| Power loss | 1.8 W typical |
| Potential separation | Between analog inputs and backplane bus: Yes; between channels: No |
| Lifecycle | Announcement of product phase-out |
Frequently Asked Questions
What is the exact order number of the analog input module?
The exact order number is Siemens 6ES7431-1KF00-0AB0.
How many analog inputs does the SM 431 have?
It has 8 analog inputs: 8 for voltage/current measurement and 4 for resistance measurement.
Which signal encoder connections are supported?
It supports voltage measurement, 2-wire current measurement with external transmitter supply, 4-wire current measurement, and 2-wire, 3-wire and 4-wire resistance measurement.
What is the lifecycle status of this configuration?
The product lifecycle is Announcement of product phase-out.
