S7-200 Analog Input Module, 4 Differential Inputs, 12 Bit, Model EM 231 | Siemens

Siemens SIMATIC S7-200 EM 231 Analog Input Module (6ES7231-0HC22-0XA0), 4 Inputs, 12 Bit

The Siemens SIMATIC S7-200 EM 231 (ref. 6ES7231-0HC22-0XA0) is an analog input expansion module designed for S7-22X CPUs. It features 4 differential analog inputs and 12-bit resolution, allowing for high-precision processing of voltage and current signals. Conversion time is 250 µs per channel. It supports multiple input ranges for voltage and current. Includes a diagnostic LED for external fault identification and connection via plug-in terminals. Power supply: 10 VDC / 20 mA. Replacement part for existing systems (product discontinued). Open Box condition in perfect state, 1-year warranty. Manufactured in Germany.

Applications

• Acquisition of analog signals from temperature, pressure, and flow sensors in S7-200 PLCs
• Expansion of analog capabilities in existing SIMATIC S7-22X CPUs
• Industrial process control and measurement with high accuracy (12 bits)
• Maintenance and replacement of EM 231 modules in operational S7-200 installations
• Integration of 0-10V or 4-20mA signals into legacy Siemens automation systems
• Applications in manufacturing, food processing, pharmaceuticals, and industrial infrastructure

Technical Specifications

• Model: EM 231 (ref. 6ES7231-0HC22-0XA0)
• Brand: Siemens
• Series: SIMATIC S7-200
• Type: Analog input expansion module
• Compatibility: S7-22X CPUs (SIMATIC S7-200)
• Number of inputs: 4 differential type
• Resolution: 12 bits
• Conversion time: 250 µs per channel
• Input ranges: Voltage and current (multiple ranges)
• Power supply: 10 VDC / 20 mA
• Diagnostics: Status LED for external faults
• Connection: Plug-in terminals
• Status: Replacement part (product discontinued)
• Condition: Open Box – component in perfect condition
• Warranty: 1 year
• Country of origin: Germany

Other Common Names

• Analog module 4 inputs 12 bit Siemens S7-200 EM231
• Analog input module Siemens 6ES7231-0HC22-0XA0 S7-200
• SIMATIC S7-200 analog expansion module 4AI differential
• EM 231 Siemens S7-200 4 analog inputs 250µs
• Expansion module analog input 12-bit S7-200 Siemens
• Replacement analog module PLC Siemens S7-200 CPU S7-22X