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Siemens SIMATIC S7-400 SM 431 Analog Input Module 6ES7431-1KF20-0AB0
Manufacturer: Siemens
Condition: Brand New
Lead Time: In Stock
Origin: Germany
Warranty: 12 Months
Email: [email protected]
whatsApp: +86-18150117685
- Overview
- Product Overview
- Key Functions
- Official Specifications
- Frequently Asked Questions
- Compatibility & Ordering Notes
- Hot Selling Models
- Recommended Products
Overview
Siemens • SIMATIC S7-400
6ES7431-1KF20-0AB0 SIMATIC S7-400 SM 431 Analog Input Module
The SIMATIC S7-400 SM 431 provides eight isolated analog inputs for voltage, current and resistance measurements with up to 14-bit resolution and fast module execution.
At a Glance
| Brand | Siemens |
|---|---|
| Model | 6ES7431-1KF20-0AB0 |
| Product Type | Eight-channel isolated analog input module |
| Core Function | Measures voltage, current and resistance signals with up to 14-bit resolution |
| Application or Compatible Series | S7-400 process measurement using voltage, transmitter current or resistance sensors |
Exact Identification
Match 6ES7431-1KF20-0AB0 character by character and confirm the complete SIMATIC S7-400 SM 431 Analog Input Module designation.
Interface Arrangement
Confirm the installed supply, ports, field connections and required accessories before wiring the replacement.
Configuration Check
Preserve the approved engineering project, network parameters and application data used by the installed system.
Product Overview
The SIMATIC S7-400 SM 431 provides eight isolated analog inputs for voltage, current and resistance measurements with up to 14-bit resolution and fast module execution.
Eight channels acquire configured voltage, current or resistance signals. The module supports voltage, two-wire and four-wire current transmitters and resistance connections. A 52 microsecond basic conversion time and 0.42 ms module execution support responsive measurement.
Key Functions
Eight Analog Inputs
Eight channels acquire configured voltage, current or resistance signals.
Multiple Sensor Connections
The module supports voltage, two-wire and four-wire current transmitters and resistance connections.
Fast Module Processing
A 52 microsecond basic conversion time and 0.42 ms module execution support responsive measurement.
Official Specifications
| Analog Inputs | 8 |
|---|---|
| Maximum Resolution | 14 bit including sign |
| Basic Conversion Time | 52 us |
| Basic Module Execution Time | 0.42 ms with all channels enabled |
| Integration Time | Parameterizable |
| Interference Suppression | None, 400 Hz, 60 Hz or 50 Hz |
| Input Filter Time Constant | 15 us |
| Voltage Measurement | Supported |
| Two-Wire Current Transmitters | Supported |
| Four-Wire Current Transmitters | Supported |
| Resistance Connection | 2-wire, 3-wire or 4-wire |
| Shielded Cable Length | 200 m maximum |
| Temperature Error | 0.03% per K |
| Basic Current Error | 0.7% of input range |
| Basic Resistance Error | 0.7% for 0 to 600 ohm |
| Diagnostics | Not provided |
| Dimensions W x H x D | 25 x 290 x 210 mm |
| Approximate Weight | 500 g |
Frequently Asked Questions
Which measurements can 6ES7431-1KF20-0AB0 accept?
Configure the channels for supported voltage, current or resistance measurements.
Can two-wire transmitters connect to 6ES7431-1KF20-0AB0?
Yes; two-wire and four-wire current transmitter connections are supported.
What is the maximum resolution of 6ES7431-1KF20-0AB0?
The module provides up to 14-bit resolution including sign.
Does 6ES7431-1KF20-0AB0 provide diagnostic alarms?
No; use controller logic and external loop checks to supervise the measurement circuits.
How should resistance sensors be wired to 6ES7431-1KF20-0AB0?
Use the configured two-wire, three-wire or four-wire connection and account for lead resistance.
What settings should be recorded before replacing 6ES7431-1KF20-0AB0?
Record every channel type, range, integration setting, address, terminal and process scaling.
What must be tested after installing 6ES7431-1KF20-0AB0?
Inject known values into all enabled channels and verify wiring, scaling, interference suppression and engineering units.
Compatibility & Ordering Notes
Compatibility Checklist
- Match each channel type, range and sensor connection.
- Reproduce the original S7-400 slot and address allocation.
- Validate every loop with known input values after replacement.
