SIEMENS 6ES7231-4HD32-0XB0 Used Working SIMATIC S7-1200 Analog Input

Product Overview

The Siemens 6ES7231-4HD32-0XB0 (SM 1231) is a high-precision 4-Channel Analog Input Module designed for the SIMATIC S7-1200 PLC family. This expansion module allows for the integration of up to four analog sensors—such as pressure transducers, flow meters, or temperature transmitters—into your control system. Each channel is individually configurable for either voltage or current signals, providing the flexibility needed for diverse industrial process monitoring. This Used Working unit offers Siemens' legendary reliability and high-resolution data acquisition at a significant value for system upgrades or maintenance spares.

Key Features

• 4 Analog Inputs: Four independent channels that can be configured to read different signal types simultaneously.
• Versatile Signal Ranges: Supports standard industrial ranges including ±10V, ±5V, ±2.5V, or 0–20mA / 4–20mA.
• High Resolution: 13-bit resolution (plus sign bit) ensures precise measurement and smooth data scaling within your PLC program.
• Rapid Conversion: Fast conversion times allow the module to keep up with dynamic process changes in real-time.
• TIA Portal Native: Effortless drag-and-drop configuration within the Siemens TIA Portal environment with built-in hardware diagnostics.
• Isolated Design: Features electrical isolation between the channels and the backplane bus to protect the CPU from field-side interference.
• Compact Footprint: Matches the sleek profile of the S7-1200 series, clipping directly onto the 35mm DIN rail and connecting via the built-in slide connector.

Item Condition (Used - Working)

• Functional Status: Used - Working. This module has been professionally removed from a working S7-1200 station. It has been bench-tested for signal accuracy and verified for bus communication with a CPU 1214C.
• Physical State: Excellent condition. The terminal covers open and close smoothly, and the side bus connector is in perfect condition.
• Technical Integrity: Terminal screws are clean and unstripped. No evidence of electrical overheating or terminal arcing is present.
• Visual Reference: Please refer to the high-resolution images to confirm the hardware revision (E-Stand); the unit pictured is the exact SM 1231 module you will receive.

Package Includes

1. 1 x Siemens SIMATIC S7-1231 Analog Input Module (Used)
2. 1 x Removable Terminal Block (Attached)
3. Note: Does not include original Siemens packaging or programming software.