Product Description
Key Features
- Analog input capacity: 8 analog inputs, including 8 inputs for resistance measurement.
- Resolution and conversion: Resolution with overrange is 16 bit; integration time is 20 ms at 50 Hz for the entire module including wire break.
- Supported input types: Resistance thermometer and resistance inputs are supported; voltage, current and thermocouple input ranges are not supported.
- RTD support: Pt100, Pt1000, Pt200, Pt500, Ni100 and Ni1000 are supported, with selectable Europe/U.S. characteristics for Ni1000 and Ni100.
- Diagnostics and alarms: Diagnostics, diagnostic alarms and hardware interrupts are parameterizable; limit value alarms are supported.
- Lifecycle data: Product lifecycle: Announcement of product phase-out.
Applications
- Resistance measurement: Measures resistance using two-wire or three-wire signal-encoder connections.
- Resistance thermometer measurement: Measures resistance thermometers including Pt100, Pt1000, Pt200, Pt500, Ni100 and Ni1000.
Technical Summary
| Product type | SIMATIC S7-400 analog input SM 431 |
|---|---|
| Analog inputs | 8 |
| Resolution with overrange | 16 bit |
| Integration time | 20 ms at 50 Hz (entire module incl. wire break) |
| Basic conversion time | 8 / 23 / 25 ms |
| Resistance thermometer types | Pt100, Pt1000, Pt200, Pt500, Ni100, Ni1000 |
| Constant measurement current | 1 mA, typ. |
| Diagnostics function | Yes; Parameterizable |
| Diagnostic alarm | Yes; Parameterizable |
| Potential separation | Between the channels and backplane bus: Yes; between the channels: No |
| Product lifecycle | Announcement of product phase-out |
Frequently Asked Questions
How many analog inputs does 6ES7431-7KF10-0AB0 have?
It has 8 analog inputs, including 8 inputs for resistance measurement.
Which resistance thermometers are supported?
It supports Pt100, Pt1000, Pt200, Pt500, Ni100 and Ni1000.
What resolution and integration time does the module provide?
Resolution with overrange is 16 bit, and integration time is 20 ms at 50 Hz for the entire module including wire break.
Does the module provide diagnostics and alarms?
Yes. Diagnostics and diagnostic alarms are parameterizable, and limit value alarms are supported.
