Siemens
- Available:
- 4 pcs.In-StockUpdated at: 31-10-2025
- Offer from:
Trusted supplier — United Kingdom, member since 2021
Meet global industrial automation leaders at ANEXPO 2027| Learn More
Need more information?
The Siemens S7-1200 Digital Input Module (SM 1221) is designed to enhance the functionality of your S7-1200 PLC system. This module provides 16 digital inputs with a 24V DC sink/source configuration, making it ideal for a wide range of industrial automation applications. It ensures precise and reliable signal processing, conforming to IEC 61131 Type 1 standards.
With a compact design, the SM 1221 module features a robust plastic enclosure, ensuring durability and protection with an IP20 rating. The module supports a wide operating temperature range from -20°C to 60°C, making it suitable for various industrial environments. Additionally, it offers diagnostic capabilities with LED indicators for input status, ensuring easy monitoring and maintenance.
The module is equipped with potential separation between channels in groups of four, enhancing safety and reliability. It supports a maximum cable length of 500 meters for shielded cables and 300 meters for unshielded cables, providing flexibility in installation. The input delay is parameterizable, allowing customization to meet specific application requirements.
Compliant with international standards, the SM 1221 module holds approvals from CE, CSA, UL, cULus, FM, RCM, KC, and Marine. It also meets the ecological footprint requirements with an environmental product declaration and global warming potential metrics.
Applications: This digital input module is perfect for use in manufacturing, process control, and other industrial...
Siemens
Siemens
Siemens
Register now to explore 36 mln offers from verified suppliers worldwide.Including 29 more offers for this product.
Datasheet for Siemens 6ES7221-1BH32-0XB0, including specifications and features.
3D CAD model and technical drawings, ready for your design software.

Get real-time analytics and market data to optimize your purchasing decisions for this component and similar products