Siemens 6ES7231-5ND32-0XB0 SM 1231 4-Channel 16-Bit Analog Input Module
A four-channel high-resolution S7-1200 module for fast voltage and current acquisition.
Key Information
6ES7231-5ND32-0XB0 is the SM 1231 high-resolution analog input module with four differential channels and a maximum 15-bit resolution plus sign. Its published signal set adds a ±1.25 V range to the voltage choices used by the standard 4HD32 module.
Siemens publishes a maximum 100 µs update across all channels, making the article distinct in both resolution and acquisition speed. The configured range and actual source bandwidth remain part of the application design.
The exact module uses a 24 V DC rated supply, 65 mA typical input current and 1.8 W typical power loss.
Functions
High-resolution conversion
Digitizes four differential channels at up to 15 bits plus sign.
Fast multi-channel update
Refreshes the complete four-channel set in as little as the published 100 µs maximum.
Extended low-voltage range
Includes ±1.25 V alongside ±2.5 V, ±5 V and ±10 V selections.
Current-loop support
Acquires 0–20 mA or 4–20 mA signals when channels are configured for current.
Specifications
- Manufacturer
- Siemens
- Exact model
- 6ES7231-5ND32-0XB0
- Designation
- SM 1231 AI 4x16 bit
- Analog inputs
- 4 differential
- Voltage ranges
- ±10 V, ±5 V, ±2.5 V, ±1.25 V
- Current ranges
- 0–20 mA, 4–20 mA
- Resolution
- 15 bit + sign
- All-channel update
- 100 µs maximum
- Rated supply
- 24 V DC
- Typical input current
- 65 mA
- Backplane current
- 80 mA at 5 V DC
- Typical power loss
- 1.8 W
- Voltage input resistance
- ≥1 MΩ
About IndustryParts
https://www.industryparts.com/Exact-model handling for 6ES7231-5ND32-0XB0
IndustryParts keeps the complete model label, requested quantity, application evidence and delivery requirements together so the proposed supply can be checked against the installed system before dispatch.
Installation
Confirm the performance need
Record why the selected range, resolution and 100 µs update are required by the application.
Protect signal integrity
Review differential wiring, grounding, shield termination and source impedance before fitting.
Validate dynamic response
Use traceable steady points and an approved response test to prove scaling and acquisition behavior.
Lifecycle
Parameter custody
Keep range, filtering and scaling parameters with the PLC project and loop register.
Performance trending
Retain baseline noise and response results so degradation can be separated from process variation.
Article control
Do not replace 6ES7231-5ND32-0XB0 with 4HD32 merely because both have four voltage/current inputs.
Related Models
FAQ
What makes 6ES7231-5ND32-0XB0 different from 6ES7231-4HD32-0XB0?
It provides up to 15-bit resolution plus sign, a 100 µs all-channel update and an additional ±1.25 V range.
Which evidence supports a 6ES7231-5ND32-0XB0 quotation?
Send the exact label, CPU and slot record, four-channel range table, required update behavior, loop drawings and project version.
Does 6ES7231-5ND32-0XB0 accept RTD sensors directly?
No. It is a voltage/current module; direct resistance-temperature measurement belongs to the designated RTD article.
How should noise performance be checked on 6ES7231-5ND32-0XB0?
Compare grounded-reference and live-source readings using the approved wiring, shielding and filter configuration.
What proves 6ES7231-5ND32-0XB0 is ready for production?
Document traceable static points, dynamic response where required, stable diagnostics and correct process scaling for every channel.
