Siemens 6ES7231-4HD32-0XB0 SM 1231 4-Channel Analog Input Module
A four-channel S7-1200 analog input module for documented voltage and current signals.
Key Information
6ES7231-4HD32-0XB0 is the SIMATIC S7-1200 SM 1231 module with four differential analog inputs. Siemens permits voltage ranges of ±10 V, ±5 V and ±2.5 V plus 0–20 mA and 4–20 mA current ranges.
The module is intended for voltage or current acquisition; it is not the RTD or thermocouple execution. Channel mode, scaling, conductor routing and the complete MLFB must stay with the PLC hardware record.
Siemens publishes a 24 V DC rated supply, 1.5 W typical power loss and a maximum 625 µs update for all four channels.
Functions
Mixed analog acquisition
Accepts four differential voltage or current signals in the ranges enabled by the hardware configuration.
Process-value conversion
Converts each selected range at up to 12-bit resolution plus sign for transfer to the S7-1200 CPU.
Channel diagnostics
Supports a controlled commissioning record built around wiring, configured range and plausible raw values.
Compact expansion
Adds four analog points without selecting the higher-density eight-channel 4HF32 module.
Specifications
- Manufacturer
- Siemens
- Exact model
- 6ES7231-4HD32-0XB0
- Module designation
- SM 1231 AI 4x13 bit
- Analog inputs
- 4 differential
- Voltage ranges
- ±10 V, ±5 V, ±2.5 V
- Current ranges
- 0–20 mA, 4–20 mA
- Resolution
- 12 bit + sign
- All-channel update
- 625 µs maximum
- Rated supply
- 24 V DC
- Typical power loss
- 1.5 W
- Current input resistance
- 280 Ω
- Voltage input resistance
- ≥9 MΩ
About IndustryParts
https://www.industryparts.com/Exact-model handling for 6ES7231-4HD32-0XB0
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
Define every channel mode
Record voltage or current selection, range, scaling, signal common and shield treatment before removal.
Respect input boundaries
Check source polarity and ensure field fault conditions remain within the published 35 V and 40 mA destruction limits.
Prove raw and scaled values
Apply traceable test points to each used channel and compare PLC counts, engineering units and alarm behavior.
Lifecycle
Configuration control
Keep the TIA Portal hardware record and complete 6ES7231-4HD32-0XB0 MLFB together.
Calibration evidence
Archive the source instrument, applied points, tolerance and as-left readings for each active loop.
Spare distinction
Do not substitute the eight-channel 4HF32 or sensor-specific RTD/TC variants without engineering review.
Related Models
FAQ
Which channel record should accompany a 6ES7231-4HD32-0XB0 enquiry?
Provide the CPU MLFB, installed slot, configured range for every channel, loop drawings, project version and full module label.
Can 6ES7231-4HD32-0XB0 directly measure an RTD or thermocouple?
No. Siemens identifies this article for voltage and current input; use the specified RTD or TC module when those sensors are required.
Why is 4HD32 not interchangeable with 4HF32 for 6ES7231-4HD32-0XB0?
The 4HD32 has four inputs while 4HF32 has eight; terminal allocation, project data and channel density differ.
What should be captured before removing 6ES7231-4HD32-0XB0?
Save scaling, filter settings, diagnostic state, conductor markers and stable reference readings for every active input.
How is 6ES7231-4HD32-0XB0 accepted after installation?
Verify each configured range with known signals, confirm engineering scaling and complete the approved alarm and interlock tests.
