# Siemens SM 1223 Digital I/O Module 6ES7223-1BH32-0XB0, 8 DI and 8 DO, 24V DC

**URL:** https://aio.lv/en/product--siemens-6es72231bh320xb0--3746852
**Data updated:** 2026-05-18 02:44 (EEST)
**Category:** Server Parts & Components
**Manufacturer:** Siemens
**Manufacturer code:** 6ES72231BH320XB0
**EAN:** 6940408101982
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Siemens SM 1223 (6ES7223-1BH32-0XB0) is a digital input/output expansion module designed for the SIMATIC S7-1200 PLC system. It features 8 digital inputs and 8 digital outputs operating at 24V DC. This module is essential for expanding the processing capabilities of industrial automation systems, providing reliable signal integration for various sensors and actuators in manufacturing and control applications.

## Long description

The Siemens SM 1223 digital I/O module is a high-performance expansion unit specifically engineered for the SIMATIC S7-1200 programmable logic controller series. This module provides 8 digital inputs and 8 digital outputs, all operating at a standard 24V DC voltage level, allowing for seamless integration into complex industrial automation environments. By extending the I/O capacity of the base PLC unit, it enables more sophisticated control over machinery and production lines.
Advantages
This module offers exceptional reliability and robust performance in demanding industrial conditions. Its compact design ensures efficient use of space within control cabinets, while the standardized 24V DC interface simplifies wiring and compatibility with a wide range of industrial sensors and actuators. The integration process is streamlined through the TIA Portal engineering software, ensuring that users can quickly configure and deploy the module within their existing automation architecture.
Suitable for
Industrial automation and process control systems
Integration of proximity switches and limit sensors
Control of solenoid valves and contactors
Expansion of existing SIMATIC S7-1200 PLC configurations
Manufacturing and assembly line monitoring
When it may not be suitable
This module is not intended for applications requiring analog signal processing, as it is strictly limited to digital input and output operations. Furthermore, it is not compatible with PLC systems outside of the SIMATIC S7-1200 family.
Key specifications
8 digital inputs, 24V DC
8 digital outputs, 24V DC
Designed for SIMATIC S7-1200 PLC series
Compact modular housing
Standardized industrial voltage levels
How to use
Installation involves mounting the module onto a standard DIN rail directly adjacent to the S7-1200 CPU or another expansion module. The electrical connection is established via the integrated bus connector, which handles both data communication and power supply from the CPU. Once physically installed, the module must be configured within the TIA Portal software environment to map the inputs and outputs to the PLC memory addresses, allowing the user to reference them in the control program.
What to consider before purchase
Verify that your existing S7-1200 CPU supports additional expansion modules
Ensure the power supply provides sufficient 24V DC current for the connected sensors and actuators
Check the available space in the control cabinet for mounting
Confirm that the digital signal requirements match the 24V DC specification
Usage recommendations
Always ensure the power is disconnected before performing any wiring or installation tasks to prevent electrical damage to the module or the PLC system. Maintain proper cable management to avoid signal interference.

## FAQ

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### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

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