What PLC platform is this module compatible with?
It is designed for the SIMATIC S7-400 system.
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
Siemens
6ES7431-1KF00-0AB0
SIMATIC S7-400 SM 431 Analog Input Module, 8 AI, 13-bit, Isolated
Siemens
From $1,339.52In stock
Product Description
The SIMATIC S7-400 SM 431 analog input module provides eight electrically isolated analog input channels for precise signal acquisition in demanding industrial automation environments. Designed for the S7-400 platform, it supports voltage and current inputs with 13-bit resolution, enabling accurate measurement for process control and monitoring. The module’s isolation enhances noise immunity and protects upstream components, making it suitable for installations with mixed signal types and harsh electrical conditions. Integration is straightforward within the SIMATIC S7-400 rack architecture, and the module is identified by part number 6ES7431-1KF00-0AB0. Typical applications include reading analog transducers, transmitters, and resistive sensors across process, manufacturing, and utility systems. The SM 431 is engineered for reliability and compatibility with SIMATIC engineering tools, ensuring stable performance and simplified configuration. Package contents typically include the module itself; terminal blocks and accessories may be required depending on the rack configuration.
Key Features
- •8 isolated analog input channels
- •13-bit resolution for precise measurement
- •Supports voltage and current inputs
- •Engineered for SIMATIC S7-400 systems
- •Improved noise immunity via channel isolation
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: $1,980
Availability: 10 in stock
Lead time: Ships from stock
Never Used
Price: $1,720
Availability: 3 in stock
Lead time: ~6 day lead
Used
Price: $1,339.52
Availability: 60 in stock
Lead time: Ships from stock
FNFP
Price: $2,605
Availability: Available to order
Lead time: ~21 day lead
Specifications
- Model number
- SM 431
- Manufacturer part number
- 6ES7431-1KF00-0AB0
- Alternate part number
- 6ES7 431-1KF00-0AB0
- Platform compatibility
- SIMATIC S7-400
- Input channels
- 8 analog inputs
- Resolution
- 13-bit
- Input types
- Voltage / Current, resistor supported
- Channel isolation
- Isolated inputs
- Part #
- 6ES7431-1KF00-0AB0
- Category
- PLCs/Machine Control
- Subcategory
- PLC Module/Rack
- Weight
- 0.00 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
DHL, FedEx, UPS, or forwarder options can be quoted with packing photos and tracking details.
Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
Independent sourcing disclaimer
We are not an authorized distributor, reseller, or representative of Siemens, Mitsubishi, Omron, or other manufacturers listed on this site. All product names, trademarks, brands, and logos are the property of their respective owners. Products may be used, refurbished, surplus, or sourced from the secondary market unless otherwise stated.
Need 6ES7431-1KF00-0AB0 availability?
Prices and stock can change. Submit quantity, required condition, and destination for a current quote.
FAQ
How many analog inputs are available?
The module provides 8 isolated analog input channels.
What is the resolution of the inputs?
The inputs have a 13-bit resolution.
Which signal types are supported?
Voltage and current inputs are supported, with resistor measurement referenced in Siemens data.
Is this module isolated?
Yes, the analog input channels are electrically isolated.