Programmable Logic Controller Guide: Selection, Application, and Maintenance for Engineers
PLC selection guide for engineers covering IEC 61131 compliance, Siemens, Rockwell, Schneider, ABB comparison, scan time sizing, and wiring. Shop at Stoklink.
- Part number
- 6ES7231-4HD32-0XB0
- Model no
- SM 1231, AI 4x13 bit
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· From Türkiye
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SIMATIC S7-1200Siemens 6ES7231-4HD32-0XB0 SIMATIC S7-1200 SM 1231 4AI Analog Input PLC I/O Module
SIMATIC S7-1200 SM 1231 analog input, 4 channels, ±10V/±5V/±2.5V or 0-20mA/4-20mA, 13-bit resolution, IP20.
Description
About the SM 1231, AI 4x13 bit
About the SM 1231, AI 4x13 bit
The Siemens 6ES7231-4HD32-0XB0 is a SIMATIC S7-1200 SM 1231 analog input module with 4 differential channels, each configurable for ±10V, ±5V, ±2.5V, or 0-20mA/4-20mA input and 12-bit-plus-sign (13-bit) resolution. It draws 24V DC and adds diagnostic alarms for wire-break and supply-voltage faults on an IP20-rated housing, and it plugs into any S7-1200 CPU base or SM expansion slot without extra wiring accessories.
Certifications & Standards
- CE
- CSA
- UL
- cULus
- FM
- RCM
- KC
- Marine
Selection Notes
Each of the 4 channels independently accepts voltage (±10V/±5V/±2.5V) or current (0-20mA/4-20mA) inputs, so this module covers mixed sensor types on one card instead of needing separate voltage-only and current-only modules. The 625 µs max cycle time across all 4 channels and ±0.1% basic error limit at 25°C make it suitable for process signals that need fast, accurate scanning, such as pressure, flow, or temperature transmitters. Wire-break diagnostics flag an open 4-20mA loop at the module level rather than waiting for the PLC program to catch a stuck value.
Applications
Process instrumentation input on SIMATIC S7-1200 stations — pressure transmitters, flow meters, and 4-20mA loop-powered sensors in compact machine control panels.
Specification
Full specification
General information 1
| Product type designation | SM 1231, AI 4x13 bit |
|---|
Supply voltage 1
| Rated value (DC) | 24 V |
|---|
Input current 2
| Current consumption, typ. | 45 mA |
|---|---|
| from backplane bus 5 V DC, typ. | 80 mA |
Show all 92 specifications ↓ Show less ↑88 more values in Identification, Power loss, Analog inputs, Analog value generation for the inputs, Errors/accuracies, Interrupts/diagnostics/status information, Degree and class of protection, Standards, approvals, certificates, Ambient conditions, Connection method, Mechanics/material, Dimensions, Weights, Logistics.
Identification 10
| Part number | 6ES7231-4HD32-0XB0 |
|---|---|
| Type designation | SM 1231, AI 4x13 bit |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 6940408102033 |
| ETIM class | EC001420 |
| eCl@ss | 27242201 |
Power loss 1
| Power loss, typ. | 1.5 W |
|---|
Analog inputs 19
| Number of analog inputs | 4; Current or voltage differential inputs |
|---|---|
| permissible input voltage for voltage input (destruction limit), max. | 35 V |
| permissible input current for current input (destruction limit), max. | 40 mA |
| Cycle time (all channels) max. | 625 µs |
| Input ranges: Voltage | Yes; ±10V, ±5V, ±2.5V |
| Input ranges: Current | Yes; 4 to 20 mA, 0 to 20 mA |
| Input ranges: Thermocouple | No |
| Input ranges: Resistance thermometer | No |
| Input ranges: Resistance | No |
| Input ranges (rated values), voltages: -10 V to +10 V | Yes |
| Input ranges (rated values), voltages: Input resistance (-10 V to +10 V) | ≥9 MOhm |
| Input ranges (rated values), voltages: -2.5 V to +2.5 V | Yes |
| Input ranges (rated values), voltages: Input resistance (-2.5 V to +2.5 V) | ≥9 MOhm |
| Input ranges (rated values), voltages: -5 V to +5 V | Yes |
| Input ranges (rated values), voltages: Input resistance (-5 V to +5 V) | ≥9 MOhm |
| Input ranges (rated values), currents: 0 to 20 mA | Yes |
| Input ranges (rated values), currents: Input resistance (0 to 20 mA) | 280 Ω |
| Input ranges (rated values), currents: 4 mA to 20 mA | Yes |
| Input ranges (rated values), currents: Input resistance (4 mA to 20 mA) | 280 Ω |
Analog value generation for the inputs 8
| Integration and conversion time/resolution per channel: Resolution with overrange (bit including sign), max. | 12 bit; + sign |
|---|---|
| Integration and conversion time/resolution per channel: Integration time, parameterizable | Yes |
| Integration and conversion time/resolution per channel: Interference voltage suppression for interference frequency f1 in Hz | 40 dB, DC to 60 V for interference frequency 50 / 60 Hz |
| Smoothing of measured values: parameterizable | Yes |
| Smoothing of measured values: Step: None | Yes |
| Smoothing of measured values: Step: low | Yes |
| Smoothing of measured values: Step: Medium | Yes |
| Smoothing of measured values: Step: High | Yes |
Errors/accuracies 4
| Temperature error (relative to input range), (+/-) | 25 °C ±0.1%, to 55 °C ±0.2% total measurement range |
|---|---|
| Basic error limit (operational limit at 25 °C): Voltage, relative to input range, (+/-) | 0.1 % |
| Basic error limit (operational limit at 25 °C): Current, relative to input range, (+/-) | 0.1 % |
| Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency: Common mode voltage, max. | 12 V |
Interrupts/diagnostics/status information 7
| Alarms | Yes |
|---|---|
| Diagnostics function | Yes |
| Alarms: Diagnostic alarm | Yes |
| Diagnoses: Monitoring the supply voltage | Yes |
| Diagnoses: Wire break | Yes |
| Diagnostics indication LED: for status of the inputs | Yes |
| Diagnostics indication LED: for maintenance | Yes |
Degree and class of protection 1
| IP degree of protection | IP20 |
|---|
Standards, approvals, certificates 13
| CE mark | Yes |
|---|---|
| CSA approval | Yes |
| UL approval | Yes |
| cULus | Yes |
| FM approval | Yes |
| RCM (formerly C-TICK) | Yes |
| KC approval | Yes |
| Marine approval | Yes |
| Ecological footprint: environmental product declaration Global warming potential | Yes |
| Ecological footprint: global warming potential, (total) [CO2 eq] | 43.1 kg |
| Ecological footprint: global warming potential, (during production) [CO2 eq] | 7.62 kg |
| Ecological footprint: global warming potential, (during operation) [CO2 eq] | 36 kg |
| Ecological footprint: global warming potential, (after end of life cycle) [CO2 eq] | -0.544 kg |
Ambient conditions 13
| Free fall: Fall height, max. | 0.3 m; five times, in product package |
|---|---|
| Ambient temperature during operation: min. | -20 °C |
| Ambient temperature during operation: max. | 60 °C |
| Ambient temperature during operation: horizontal installation, min. | -20 °C |
| Ambient temperature during operation: vertical installation, min. | -20 °C |
| Ambient temperature during storage/transportation: min. | -40 °C |
| Ambient temperature during storage/transportation: max. | 70 °C |
| Air pressure acc. to IEC 60068-2-13: Operation, min. | 795 hPa |
| Air pressure acc. to IEC 60068-2-13: Operation, max. | 1 080 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, min. | 660 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, max. | 1 080 hPa |
| Relative humidity: Operation at 25 ℃ without condensation, max. | 95 % |
| Pollutant concentrations: SO2 at RH < 60% without condensation | S02: < 0.5 ppm; H2S: < 0.1 ppm; RH < 60 % condensation-free |
Connection method 1
| required front connector | Yes |
|---|
Mechanics/material 1
| Enclosure material (front): Plastic | Yes |
|---|
Dimensions 3
| Width | 45 mm |
|---|---|
| Height | 100 mm |
| Depth | 75 mm |
Weights 1
| Weight, approx. | 180 g |
|---|
Logistics 6
| Net weight | 0.152 kg |
|---|---|
| Country of origin | CN |
| Shipping weight | 0.652 kg |
| Ships from | Türkiye |
| Dispatch | 12 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 6ES7231-4HD32-0XB0
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Ask us for the datasheet
Certifications
Certifications and standards
- CE mark
- CSA approval
- UL approval
- cULus
- FM approval
- RCM (formerly C-TICK)
- KC approval
- Marine approval
Quick answers
Questions about the SM 1231, AI 4x13 bit
Which supply voltage is SM 1231, AI 4x13 bit rated for?
The rated operational voltage of SM 1231, AI 4x13 bit is 24 V AC.
What is the HS code of SM 1231, AI 4x13 bit for customs?
The tariff (HS) code on file for SM 1231, AI 4x13 bit is 85389091.
What is the EAN of SM 1231, AI 4x13 bit?
The EAN (GTIN) of SM 1231, AI 4x13 bit is 6940408102033.
Where does SM 1231, AI 4x13 bit ship from, and how fast?
SM 1231, AI 4x13 bit ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
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Series
Siemens SIMATIC S7-1200
- Brand
- Siemens
- Series
- SIMATIC S7-1200
