Siemens SIMATIC S7-1200 G2 SB 1231 Analog Input Signal Board, 4 AI, 14 bit, 6ES7231-4HD50-0XB0

The Siemens SIMATIC S7-1200 G2 SB 1231 is a high-performance analog input signal board designed for the SIMATIC S7-1200 controller family. This compact module adds 4 analog input channels with 14-bit resolution, enabling precise measurement of voltage and current signals. It plugs directly into the CPU, expanding the system's I/O capabilities without additional wiring or space requirements.

Advantages

• Easy installation: Direct plug-in to S7-1200 CPU, no separate mounting needed.
• High precision: 14-bit resolution for accurate analog measurements.
• Flexible input ranges: Supports ±10V, ±5V, ±2.5V, ±1.25V voltage and 0-20mA, 4-20mA current.
• Fast conversion: Approx. 625 µs per channel for real-time monitoring.
• Compact design: Saves space in control cabinets.

Suitable for

• Industrial automation and process control systems
• Machine building and plant engineering
• Data acquisition from sensors and transducers
• Integration into SIMATIC S7-1200 based solutions

Key specifications

• Product Type: Signal Board (SB)
• Function: Analog Input (AI)
• Number of Analog Inputs: 4 channels
• Resolution: 14 bit
• Input Voltage Ranges: ±10V, ±5V, ±2.5V, ±1.25V
• Input Current Ranges: 0-20mA, 4-20mA
• Accuracy (Voltage): ±0.1% full scale
• Accuracy (Current): ±0.2% full scale
• Conversion Time: Approx. 625 µs per channel
• Connection Type: Screw terminals
• Supply Voltage: 24V DC (from CPU backplane)
• Current Consumption (from backplane): Max. 10 mA
• Operating Temperature: 0 to 50 °C
• Compatibility: SIMATIC S7-1200 CPUs
• Mounting Type: Direct plug-in to CPU
• Isolation: None (channels not isolated)
• Configurable Input Type: Yes (via TIA Portal)

Recommendations

For optimal performance, use the SB 1231 with a SIMATIC S7-1200 CPU and configure the input ranges via TIA Portal. Ensure proper wiring with shielded cables for noise-sensitive applications.