6ES7231-0HC22-0XA8 Siemens EM 231 Analog Input for S7-200

Product Description

The Siemens 6ES7231-0HC22-0XA8 is an EM 231 analog input module designed for SIMATIC S7-200 CN controllers.
This module expands S7-200 CPUs by providing stable and accurate analog signal acquisition for industrial processes.
Moreover, Siemens engineered this module for compact installations where panel space and wiring efficiency matter.
The EM 231 supports precise measurement of analog signals, therefore improving control accuracy and system responsiveness.
Its proven design allows continued operation in harsh environments commonly found in manufacturing facilities.

The 6ES7231-0HC22-0XA8 belongs to the S7-200 CN product family, which targets cost-effective automation solutions.
Although Siemens has discontinued production, this module remains widely used in existing automation systems.
Therefore, it is frequently selected for maintenance, replacement, and lifecycle extension projects.

Technical Specifications

• Manufacturer: Siemens

• Article Number: 6ES7231-0HC22-0XA8

• Product Type: Analog Input Module (EM 231)

• Product Family: SIMATIC S7-200 CN

• Compatible CPUs: SIMATIC S7-200 CN series

• Analog Inputs: 4 channels

• Signal Types: Voltage / Current (model-dependent configuration)

• Resolution: High-resolution analog conversion for process signals

• Power Supply: Provided via S7-200 system bus

• Mounting: Snap-on expansion module, right-side CPU mounting

• Lifecycle Status: Product discontinued

• Operating Temperature: 0 … +55 °C

• Storage Temperature: -40 … +70 °C

• Packaging Dimensions (L × W × H): 9.9 × 8.6 × 7.3 cm

• Net Weight: 0.174 kg

• RoHS Compliance: Yes, since 2008-03-31

• WEEE Obligation: Yes

FAQ

What is the function of the Siemens 6ES7231-0HC22-0XA8?
It provides analog input channels for SIMATIC S7-200 CN PLC systems.

Is this module compatible with standard S7-200 CPUs?
No, it is specifically intended for the S7-200 CN product line.

Is the product still manufactured by Siemens?
No, Siemens has discontinued production, but it remains widely used in existing systems.

How is the module installed?
It mounts directly to the right side of a compatible S7-200 CN CPU.

Does it support industrial environments?
Yes, it is designed for stable operation in demanding industrial conditions.