SIEMENS 6ES7231-5PD32-0XB0 Used Working SIMATIC S7-1200 Analog Input

Product Overview

The Siemens 6ES7231-5PD32-0XB0 (SM 1231 RTD) is a high-precision analog expansion module for the SIMATIC S7-1200 PLC series. This specialized module is designed for direct temperature measurement, supporting a wide range of Resistance Temperature Detectors (RTD) such as Pt100, Pt1000, and Ni100. Featuring 4 high-resolution inputs, it provides accurate temperature data acquisition for process industries, HVAC systems, and thermal monitoring applications. This Used Working unit offers a reliable way to expand your S7-1200 system’s sensing capabilities with Siemens' signature industrial build quality at a reduced cost.

Key Features

• 4-Channel RTD Inputs: Allows for the simultaneous connection of up to four temperature sensors on a single compact module.
• Superior Resolution: Features 15-bit + sign resolution, ensuring highly granular and precise temperature readings for sensitive processes.
• Multi-Sensor Support: Compatible with various resistance sensors (Pt, Ni, Cu, and LG-Ni) and resistance measurements (150, 300, and 600 Ohms).
• Flexible Wiring: Supports 2-wire, 3-wire, and 4-wire connection methods to compensate for lead wire resistance and improve accuracy.
• Seamless Integration: Connects directly to the right side of any S7-1200 CPU via the integrated bus connector and is easily configured within TIA Portal.
• Diagnostic LEDs: Equipped with channel-specific status LEDs and a module "Diag" light for rapid troubleshooting of wiring faults or overflow conditions.

Item Condition (Used - Working)

• Functional Status: Used - Working. This module has been pulled from a decommissioned, climate-controlled control cabinet. It has been tested for communication with an S7-1200 CPU and signal response.
• Physical State: Excellent physical condition with minimal signs of wear. The DIN rail clip is springy and secure, and the terminal blocks are clean.
• Electrical Integrity: The bus connector pins are straight and oxidation-free. The module firmware is stable and ready for commissioning.
• Visual Reference: Please refer to the high-resolution images to verify the hardware version (HW) and serial number; the unit pictured is the exact module you will receive.

Package Includes

1. 1 x Siemens 6ES7231-5PD32-0XB0 SM 1231 Analog Input Module (Used)
2. 1 x Set of Removable Terminal Blocks (Installed)
3. Note: Does not include original Siemens factory box or printed manual. Documentation is available via the Siemens Industry Online Support (SIOS) portal.