Signal Board 1 analog input

Siemens 6ES7231-4HA30-0XB0 is an analogue input signal board designed for use with SIMATIC S7-1200 programmable logic controllers. It provides a single, high-precision analogue input channel for connecting sensors and transmitters directly to the PLC.

Key Features

• Type: Analogue input signal board (SB 1231, AI 1x12 bit)

• Number of Inputs: 1 analogue input (differential)

• Input Types Supported:

  • Voltage: ±10 V, ±5 V, ±2.5 V

  • Current: 0–20 mA

• Resolution: 12 bits (including sign)

• Input Resistance:

  • Voltage: ≥9 MΩ

  • Current: ≥250 Ω

• Cycle Time (max): 156.25 μs (all channels)

• Measurement Principle: Integrating

• Interference Suppression: 40 dB at DC–60 Hz (for interference voltage)

• Smoothing: Parameterizable (none, low, medium, high)

• Accuracy:

  • Temperature error: ±0.3% at 25°C, ±0.6% at 55°C (relative to input range)

• Maximum Permissible Input:

  • Voltage (destruction limit): 35 V

  • Current (destruction limit): 40 mA

• Diagnostics:

  • Diagnostic alarm: Yes

  • Diagnostic LED: Yes (status and maintenance)

• Power Supply:

  • From backplane bus: 5 V DC, typical 55 mA

  • From PLC: 24 V DC (for signal board supply)

• Power Loss: Typical 0.4 W

• Cable Length:

  • Max. shielded, twisted pair: 100 m

• Operating Temperature: -20°C to +60°C (horizontal installation)

• Storage Temperature: -40°C to +70°C

• Relative Humidity: Up to 95% at 25°C (non-condensing)

• Protection: IP20

• Dimensions: 38 mm (width) × 62 mm (height) × 21 mm (depth)

• Weight: Approx. 30 g (gross)

• Required: Front connector (not included)

• Certificates: CE, RoHS, REACH compliant

Typical Applications

• Connection of analog sensors (voltage or current) to SIMATIC S7-1200 PLCs

• Process monitoring and control

• Integration into automation and control systems