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
- 6ES7231-5QF32-0XB0
- Model no
- SM 1231, AI 8x16 bit TC
In stock · 50+
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· From Türkiye
0
- CE
SIMATIC S7-1200Siemens 6ES7231-5QF32-0XB0 SIMATIC S7-1200 SM 1231 TC 8AI Thermocouple PLC I/O Module
SIMATIC S7-1200 SM 1231 analog input module, 8AI thermocouple, 10 TC types supported, 15-bit + sign.
Description
About the SM 1231, AI 8x16 bit TC
About the SM 1231, AI 8x16 bit TC
Siemens 6ES7231-5QF32-0XB0 is a SIMATIC S7-1200 SM 1231 analog input module with 8 thermocouple channels, 15-bit plus sign resolution, and support for 10 thermocouple types (J, K, T, E, R, S, B, N, C, TXK/TXK(L)). It runs from a 24 V DC supply, draws 40 mA typical, and adds diagnostic wire-break and supply-voltage monitoring per channel.
Certifications & Standards
- CE
- CSA
- UL
- cULus
- FM
- RCM
- KC
- Marine
Selection Notes
The 8-channel TC variant covers ten thermocouple types on one module, so a single SM 1231 TC can serve mixed-sensor applications - K-type on one channel, J-type on another - without separate voltage-input modules. 15-bit plus sign resolution and built-in wire-break diagnostics per channel matter where a broken thermocouple lead must be flagged rather than silently read as a stuck value. If the application only needs standard voltage or current-loop sensors, the SM 1231 voltage/current variant is the simpler, less expensive choice.
Applications
Used for temperature monitoring and closed-loop control on S7-1200 stations - ovens, extruders, kilns, and process heating skids - where multiple thermocouple types are already installed across sensors.
Specification
Full specification
General information 1
| Product type designation | SM 1231, AI 8x16 bit TC |
|---|
Supply voltage 1
| Rated value (DC) | 24 V |
|---|
Input current 2
| Current consumption, typ. | 40 mA |
|---|---|
| from backplane bus 5 V DC, typ. | 80 mA |
Show all 85 specifications ↓ Show less ↑81 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, Version Classification, General Product Approval, Logistics.
Identification 10
| Part number | 6ES7231-5QF32-0XB0 |
|---|---|
| Type designation | SM 1231, AI 8x16 bit TC |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 6940408101906 |
| ETIM class | EC001420 |
| eCl@ss | 27242201 |
Power loss 1
| Power loss, typ. | 1.5 W |
|---|
Analog inputs 21
| Number of analog inputs | 8; Thermocouples |
|---|---|
| permissible input voltage for voltage input (destruction limit), max. | ±35 V |
| Technical unit for temperature measurement adjustable | Degrees Celsius/degrees Fahrenheit |
| Input ranges: Voltage | Yes |
| Input ranges: Current | No |
| Input ranges: Thermocouple | Yes; J, K, T, E, R & S, B, N, C, TXK/XK(L); voltage range: ±80 mV |
| Input ranges: Resistance thermometer | No |
| Input ranges: Resistance | No |
| Input ranges (rated values), voltages: -80 mV to +80 mV | Yes |
| Input ranges (rated values), voltages: Input resistance (-80 mV to +80 mV) | ≥1 MOhm |
| Input ranges (rated values), thermocouples: Type B | Yes |
| Input ranges (rated values), thermocouples: Type C | Yes |
| Input ranges (rated values), thermocouples: Type E | Yes |
| Input ranges (rated values), thermocouples: Type J | Yes |
| Input ranges (rated values), thermocouples: Type K | Yes |
| Input ranges (rated values), thermocouples: Type N | Yes |
| Input ranges (rated values), thermocouples: Type R | Yes |
| Input ranges (rated values), thermocouples: Type S | Yes |
| Input ranges (rated values), thermocouples: Type T | Yes |
| Input ranges (rated values), thermocouples: Type TXK/TXK(L) to GOST | Yes |
| Thermocouple (TC) Temperature compensation: Parameterizable | No |
Analog value generation for the inputs 5
| Measurement principle | integrating |
|---|---|
| Integration and conversion time/resolution per channel: Resolution with overrange (bit including sign), max. | 15 bit; + sign |
| Integration and conversion time/resolution per channel: Integration time, parameterizable | No |
| Integration and conversion time/resolution per channel: Interference voltage suppression for interference frequency f1 in Hz | 85 dB at 50 / 60 / 400 Hz |
| Smoothing of measured values: parameterizable | Yes |
Errors/accuracies 3
| Temperature error (relative to input range), (+/-) | 25 °C ±0.1%, to 55 °C ±0.2% total measurement range |
|---|---|
| Repeat accuracy in steady state at 25 °C (relative to output range), (+/-) | 0.5 % |
| Interference voltage suppression for f = n x (f1 +/- 1 %), f1 = interference frequency: Common mode interference, min. | 120 dB |
Interrupts/diagnostics/status information 7
| Alarms | Yes |
|---|---|
| Diagnostics function | Yes; Can be read out |
| 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 8
| 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 |
Version Classification 4
| eClass | 16 27-24-22-01 |
|---|---|
| ETIM | 10 EC001420 |
| IDEA | 4 3562 |
| UNSPSC | 15 32-15-17-05 |
General Product Approval 2
| Miscellaneous Manufacturer Declara- Metrological Approval tion | For use in hazard- |
|---|---|
| General Product Approval EMV | ous locations |
Logistics 6
| Net weight | 0.191 kg |
|---|---|
| Country of origin | CN |
| Shipping weight | 0.691 kg |
| Ships from | Türkiye |
| Dispatch | 12 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 6ES7231-5QF32-0XB0
No documents are on file for this part yet.
Ask us for the datasheet
Certifications
Certifications and standards
- CE
- 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 8x16 bit TC
Which supply voltage is SM 1231, AI 8x16 bit TC rated for?
The rated operational voltage of SM 1231, AI 8x16 bit TC is 24 V AC.
What is the HS code of SM 1231, AI 8x16 bit TC for customs?
The tariff (HS) code on file for SM 1231, AI 8x16 bit TC is 85389091.
What is the EAN of SM 1231, AI 8x16 bit TC?
The EAN (GTIN) of SM 1231, AI 8x16 bit TC is 6940408101906.
Where does SM 1231, AI 8x16 bit TC ship from, and how fast?
SM 1231, AI 8x16 bit TC 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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Reviews
Customer reviews
Series
Siemens SIMATIC S7-1200
- Brand
- Siemens
- Series
- SIMATIC S7-1200
