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
- 6ES7231-4HD50-0XB0
- Model no
- SB 1231, AI 4x 14 bit
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· From Türkiye
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- CE
SIMATIC S7-1200Siemens 6ES7231-4HD50-0XB0 SIMATIC S7-1200 SB 1231 4AI 14-Bit Signal Board PLC I/O Module
Siemens SB 1231 signal board, 4 AI, 14-bit, +/-10V or 4-20mA, for SIMATIC S7-1200.
Description
About the SB 1231, AI 4x 14 bit
About the SB 1231, AI 4x 14 bit
The Siemens 6ES7231-4HD50-0XB0 SB 1231 is a signal board for the SIMATIC S7-1200 that adds 4 analog inputs with 13-bit plus sign resolution, selectable for +/-10V, +/-5V, +/-2.5V, or 0/4-20 mA per channel. It draws 24 V DC at 30 mA and mounts directly on the CPU faceplate without a backplane slot.
Certifications & Standards
- CE
- UL
- cULus
- RCM
- KC
Selection Notes
13-bit-plus-sign resolution across four switchable voltage or current ranges lets the same board read a 4-20 mA pressure transmitter on one channel and a +/-10V load cell amplifier on another, without separate hardware per signal type. Wire-break detection on the current ranges flags a disconnected 4-20 mA loop as a diagnostic alarm rather than a silent zero reading. Because it occupies the CPU's signal-board slot rather than a backplane position, adding analog sensing this way leaves the backplane's SM slots free for higher-channel-count I/O modules.
Applications
Low-channel-count analog sensing (temperature, pressure, level, load) on SIMATIC S7-1200 CPUs where a full SM 1234-class analog module isn't justified by the point count.
Specification
Full specification
General information 1
| Product type designation | SB 1231, AI 4x 14 bit |
|---|
Supply voltage 3
| Rated value (DC) | 24 V |
|---|---|
| permissible range, lower limit (DC) | 20.4 V |
| permissible range, upper limit (DC) | 28.8 V |
Input current 2
| Current consumption, typ. | 30 mA |
|---|---|
| from backplane bus 5 V DC, typ. | 28 mA |
Show all 101 specifications ↓ Show less ↑95 more values in Identification, Power loss, Analog inputs, Analog value generation for the inputs, Errors/accuracies, Interrupts/diagnostics/status information, Standards, approvals, certificates, Ambient conditions, Connection method, Mechanics/material, Dimensions, Weights, Approvals / Certificates, Logistics.
Identification 10
| Part number | 6ES7231-4HD50-0XB0 |
|---|---|
| Type designation | SB 1231, AI 4x 14 bit |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4034106035945 |
| ETIM class | EC001420 |
| eCl@ss | 27242201 |
Power loss 1
| Power loss, typ. | 1.4 W |
|---|
Analog inputs 20
| 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. | 0.625 ms; at 400 Hz rejection |
| 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) | ≥1 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) | ≥1 MOhm |
| Input ranges (rated values), voltages: -5 V to +5 V | Yes |
| Input ranges (rated values), voltages: Input resistance (-5 V to +5 V) | ≥1 MOhm |
| Input ranges (rated values), currents: 0 to 20 mA | Yes |
| Input ranges (rated values), currents: Input resistance (0 to 20 mA) | 270 Ω |
| Input ranges (rated values), currents: 4 mA to 20 mA | Yes |
| Input ranges (rated values), currents: Input resistance (4 mA to 20 mA) | 270 Ω |
| Cable length: shielded, max. | 100 m; shielded, twisted pair |
Analog value generation for the inputs 9
| Measurement principle | successive approximation |
|---|---|
| Integration and conversion time/resolution per channel: Resolution with overrange (bit including sign), max. | 13 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 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 % / -20 °C to 60 °C ±0.2 % of the full-scale deflection |
|---|---|
| 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 6
| Diagnostics function | Yes |
|---|---|
| Alarms: Diagnostic alarm | Yes |
| Diagnoses: Monitoring the supply voltage | Yes |
| Diagnoses: Wire break | Yes |
| Diagnostics indication LED: DIAG LED | Yes |
| Diagnostics indication LED: for status of the inputs | Yes |
Standards, approvals, certificates 14
| Siemens Eco Profile (SEP) | Siemens EcoTech |
|---|---|
| CE mark | Yes |
| CSA approval | No |
| UL approval | Yes |
| cULus | Yes |
| FM approval | No |
| RCM (formerly C-TICK) | Yes |
| KC approval | Yes |
| Marine approval | No |
| Ecological footprint: environmental product declaration Global warming potential | Yes; type 2 acc. to ISO 14021 |
| Ecological footprint: global warming potential, (total) [CO2 eq] | 16.6 kg |
| Ecological footprint: global warming potential, (during production) [CO2 eq] | 3.51 kg |
| Ecological footprint: global warming potential, (during operation) [CO2 eq] | 13.3 kg |
| Ecological footprint: global warming potential, (after end of life cycle) [CO2 eq] | -0.257 kg |
Ambient conditions 17
| 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. | 40 °C; at max. voltages and max. specifications |
| 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. | 540 hPa |
| Air pressure acc. to IEC 60068-2-13: Operation, max. | 1 140 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, min. | 540 hPa |
| Air pressure acc. to IEC 60068-2-13: Storage/transport, max. | 1 140 hPa |
| Altitude during operation relating to sea level: Installation altitude, min. | -1 000 m |
| Relative humidity: Operation at 25 ℃ without condensation, max. | 95 % |
| Vibrations: Vibration resistance during operation acc. to IEC 60068-2-6 | 3.5 mm from 5 - 8.4 Hz, 1g from 8.4 - 150 Hz |
| Vibrations: Operation, tested according to IEC 60068-2-6 | Yes |
| Shock testing: tested according to IEC 60068-2-27 | Yes; IEC 68, Part 2-27 half-sine: strength of the shock 15 g (peak value), duration 11 ms |
| 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 | No |
|---|
Mechanics/material 1
| Enclosure material (front): plastic | Yes |
|---|
Dimensions 3
| Width | 15 mm |
|---|---|
| Height | 62 mm |
| Depth | 63 mm |
Weights 1
| Weight, approx. | 30 g |
|---|
Approvals / Certificates 1
| General Product Approval | Miscellaneous |
|---|
Logistics 7
| Net weight | 0.044 kg |
|---|---|
| Package dimensions | 82 × 34 × 79 mm |
| Country of origin | DE |
| Shipping weight | 0.544 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 6ES7231-4HD50-0XB0
No documents are on file for this part yet.
Ask us for the datasheet
Certifications
Certifications and standards
- CE
- CE mark
- UL approval
- cULus
- RCM (formerly C-TICK)
- KC approval
Quick answers
Questions about the SB 1231, AI 4x 14 bit
Which supply voltage is SB 1231, AI 4x 14 bit rated for?
The rated operational voltage of SB 1231, AI 4x 14 bit is 24 V AC.
What is the HS code of SB 1231, AI 4x 14 bit for customs?
The tariff (HS) code on file for SB 1231, AI 4x 14 bit is 85389091.
What is the EAN of SB 1231, AI 4x 14 bit?
The EAN (GTIN) of SB 1231, AI 4x 14 bit is 4034106035945.
Where does SB 1231, AI 4x 14 bit ship from, and how fast?
SB 1231, AI 4x 14 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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Reviews
Customer reviews
Series
Siemens SIMATIC S7-1200
- Brand
- Siemens
- Series
- SIMATIC S7-1200
