About

Siemens S7-1200 1AI Expansion Module By Naksh Technology Solution LLP The Siemens S7-1200 1AI Expansion Module is designed to enhance the analog input capacity of Siemens S7-1200 PLCs by providing one additional analog input (AI). This module is ideal for applications requiring precise measurement of voltage or current signals from sensors, transducers, or other analog devices. Key Features: 1 Analog Input (AI) - Supports voltage and current input signals High Accuracy & Resolution - Ensures precise data acquisition Seamless Integration - Easily connects with Siemens S7-1200 PLCs Compact & Space-Saving Design - Ideal for small control panels Reliable Industrial Performance - Suitable for harsh environments Applications: Process Automation & Monitoring Temperature, Pressure, & Flow Measurement Industrial Sensor Integration Smart Control Systems Naksh Technology Solution LLP is a trusted supplier of Siemens automation products, providing genuine and high-quality industrial automation solutions. For pricing and availability, contact Naksh Technology Solution LLP today! 

SIMATIC S7-1200 – SB 1231 Analog Input Module

Part No.: 6ES7231-4HA30-0XB0
Type: SB 1231, 1 AI, ±10 V DC (12-bit), or 0–20 mA

General Information

• Product type: SB 1231, AI 1×12-bit

• Supply voltage: 24 V DC

• Backplane bus current: 5 V DC, typ. 55 mA

• Power loss: 0.4 W

Analog Inputs

• Number of inputs: 1 (voltage or current, differential)

Permissible Limits

• Voltage input (max): ±35 V

• Current input (max): 40 mA

Cycle Time

• All channels: max. 156.25 µs (400 Hz suppression)

Input Ranges

Voltage

• ±10 V → Input resistance ≥ 9 MΩ

• ±5 V → Input resistance ≥ 9 MΩ

• ±2.5 V → Input resistance ≥ 9 MΩ

Current

• 0 to 20 mA → Input resistance ≥ 250 Ω

Not Supported

• Thermocouple

• RTD

• Resistance measurement

Analog Value Processing

• Measurement principle: Integrating

• Resolution (max): 11-bit + sign

• Integration time: Parameterizable

• Interference suppression: 40 dB (DC to 60 Hz)

Smoothing Options

• None

• Low

• Medium

• High

Errors & Accuracy

• Temperature error:

  • ±25°C → ±0.3%

  • Up to 55°C → ±0.6%

Diagnostics & Status

• Alarms: Yes

• Diagnostic alarm: Yes

• Wire break detection: No

• LED indications:

  • Input status

  • Maintenance

Approvals / प्रमाणपत्रs

CE, CSA, UL, cULus, FM, RCM, KC, Marine

Ambient Conditions

• Free fall: 0.3 m (5 times, packaged)

Operating Temperature

• Horizontal: −20°C to +60°C

• Vertical: −20°C to +50°C

Storage/Transport

• −40°C to +70°C

Air Pressure

• Operation: 795–1080 hPa

• Storage/transport: 660–1080 hPa

Humidity

• Up to 95% RH (non-condensing @ 25°C)

Pollutants

• SO₂ < 0.5 ppm

• H₂S < 0.1 ppm

Mechanical Data

• Front connector required: Yes

• Material: Plastic

• Dimensions:

  • Width: 38 mm

  • Height: 62 mm

  • Depth: 21 mm

• Weight: ~35 g 

Technical Details