Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | SIMATIC S7-400 SM 431 analog input |
| Analog inputs | 8 isolated analog inputs |
| Resolution | 13 bit including sign, with overrange |
| 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 |
| Backplane input current | 350 mA maximum from 5 V DC |
| Typical power loss | 1.8 W |
| Integration time | 16,7 / 20 ms |
| Basic conversion time | 23 / 25 ms |
| Diagnostics function | No |
Applications
- Voltage measurement: The module supports voltage measurement through its analog inputs.
- Current measurement: The module supports current measurement with 2-wire transducers using external transmitter supply and with 4-wire transducers.
- Resistance measurement: The module supports resistance measurement with 2-wire, 3-wire, and 4-wire connections.
Key Features
- 8 isolated analog inputs: The module has 8 analog inputs for voltage/current measurement and 4 inputs for resistance measurement. The channels are not isolated from one another, but the analog inputs are isolated from the backplane bus.
- 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 measurement supports 0 to 600 ohms, usable up to 500 ohms.
- 13-bit resolution: Resolution with overrange is maximum 13 bit including sign. Integration time is parameterizable, with basic conversion time of 23 / 25 ms and integration time of 16,7 / 20 ms.
- Signal encoder connections: Supported connections include voltage measurement, current measurement with 2-wire transducer with external transmitter supply, 4-wire current measurement, and 2-wire, 3-wire, or 4-wire resistance measurement.
- Backplane input current and power loss: Input current from the backplane bus is maximum 350 mA at 5 V DC. Typical power loss is 1.8 W.
- Module dimensions and weight: Dimensions are 25 mm width, 290 mm height, and 210 mm depth. Approximate weight is 500 g.
Frequently Asked Questions
1. How many analog inputs does Siemens 6ES7431-1KF00-0AB0 have?
It has 8 analog inputs. All 8 support voltage/current measurement, while 4 support resistance measurement.
2. Which signal ranges does the 6ES7431-1KF00-0AB0 support?
It supports 1 V to 5 V, -1 V to +1 V, and -10 V to +10 V voltage ranges; -20 mA to +20 mA and 4 mA to 20 mA current ranges; and 0 to 600 ohms resistance measurement, usable up to 500 ohms.
3. What resolution and timing does this analog input module provide?
Resolution with overrange is maximum 13 bit including sign. Basic conversion time is 23 / 25 ms, and integration time is 16,7 / 20 ms and parameterizable.
4. Does the module provide channel-to-channel isolation or diagnostics?
The analog inputs are not isolated between channels, but they are isolated from the backplane bus. The diagnostics function is No.
5. What should be verified before requesting a quote for 6ES7431-1KF00-0AB0?
Verify the required voltage, current, or resistance ranges, the signal-encoder connection type, the 2-wire current measurement requirement for external transmitter supply, and the available installation dimensions.
