Siemens 6ES7 221-1BH32-0XB0 SIMATIC S7-1200 DIGITAL INPUT SM 1221 6ES72211BH320XB0
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Siemens 6ES7 221-1BH32-0XB0 | SIMATIC S7-1200 SM 1221 Digital Input Module
Product Overview
The 6ES7 221-1BH32-0XB0 is a SM 1221 32-channel digital input module belonging to Siemens’ SIMATIC S7-1200 system. It serves as a critical expansion component designed to increase the number of discrete signal inputs for the CPU, enabling connection to up to 32 binary sensors (such as proximity switches, pushbuttons, or mechanical switches). With its compact design and high integration density, it is ideal for machinery, automation systems, and production lines where a large number of switching signals need to be processed and monitored.
Key Functions
- High-Density Signal Acquisition: Provides 32 isolated digital inputs, allowing connection to 24 V DC sensors, significantly expanding the CPU’s input capacity.
- Galvanic Isolation: Each input channel is electrically isolated to prevent interference from the field side, ensuring stable signal transmission and protecting the CPU from potential damage.
- Integrated Diagnostics: Features LED indicators for each channel to display signal status (ON/OFF), facilitating quick troubleshooting and system maintenance.
- Wide Voltage Range Compatibility: Supports 24 V DC (18 V DC to 30 V DC) industrial power supply, adapting to different field power environments.
- Fast Response Time: High-speed signal scanning capability ensures real-time capture of fast-changing switching signals, meeting the requirements of dynamic control tasks.
Technical Highlights
表格
| Category | Specification |
|---|---|
| Product Type | SIMATIC S7-1200 SM 1221 – Digital Input Module |
| Order Number | 6ES7 221-1BH32-0XB0 |
| Number of Inputs | 32 × Digital Inputs (24 V DC) |
| Input Voltage | 18 V DC to 30 V DC |
| Input Current | Typical 7 mA per channel at 24 V DC |
| Isolation | Galvanically isolated between inputs and internal circuit |
| Response Time | Adjustable via TIA Portal, typical 0.1 ms (min) to 12.5 ms (max) |
| Signal Status Indication | LED per channel (red for ON, off for OFF) |
| Short-Circuit Protection | Integrated, with group-based protection design |
| Firmware Requirement | SIMATIC S7-1200 CPU with firmware V2.0 or higher |
| Programming Software | TIA Portal (V13 and above) |
Physical Specifications
表格
| Parameter | Value |
|---|---|
| Dimensions (W×H×D) | 130 mm × 110 mm × 45 mm |
| Net Weight | Approximately 0.35 kg (350 g) |
| Mounting Method | DIN rail mounting (TS 35 / 7.5 / 15 mm), compatible with S7-1200 CPU |
| Protection Class | IP20 (front panel) |
| Operating Temperature | -25 °C to +60 °C (horizontal installation); -25 °C to +55 °C (vertical installation) |
| Storage Temperature | -40 °C to +70 °C |
| Humidity | 5% to 95% non-condensing |
Application & Compatibility
- Ideal For: Expanding input channels for SIMATIC S7-1200 series controllers in automated production lines, packaging machinery, material handling systems, and building automation projects that require a large number of switch signal inputs.
- System Integration: Seamlessly integrates with all SIMATIC S7-1200 CPUs (such as CPU 1211C, CPU 1214C, CPU 1215C, etc.), and can be used together with other S7-1200 expansion modules (SM 1222, SM 1223, CM 1241, etc.) to build a complete control system.
- Sensor Compatibility: Suitable for connecting various 24 V DC binary sensors, including inductive proximity sensors, photoelectric sensors, mechanical travel switches, pushbutton switches, and relay contacts.
Notes
- When wiring, ensure correct connection of the input signal and the 24 V DC power supply to avoid reverse connection or short circuit, which may cause module damage.
- For specific wiring diagrams and parameter configuration methods, please refer to the official Siemens manual to ensure the normal operation of the module and the control system.
This digital input module is an essential expansion unit for the SIMATIC S7-1200 system, offering high reliability, high density, and easy integration to meet the increasing demand for signal acquisition in industrial automation scenarios.
WHO WE ARE
About us
Located in Kunshan, China, Atifts Technology Co., Ltd. is a well-known enterprise specializing in electronic components distribution. We specialize in the sales of global brands of industrial automation components, with a wealth of experience in foreign product agents, and many of the world's leading manufacturers such as Keens, Schneider, SMC, ABB, Siemens, and other world-renowned manufacturers to establish a long-term and stable relations of cooperation.
Atifts Technology Co., Ltd. @ 2024
Over the years, we have always adhered to the "pioneering, pragmatic, standardized, innovative" management philosophy, and constantly promote the close integration of products and market demand. We firmly believe that only by constantly exploring new market areas, doing a good job in every detail, standardizing business processes, and continuously innovating products and services can we ensure that our products are more adaptable to market changes and meet the diversified needs of our customers.
Since the founding of the company, we have always adhered to the core concept of "survival by quality", and are committed to providing customers with high-quality electronic components. At the same time, we take specialized R & D manufacturing as the goal, market-oriented development strategy to ensure that our products are always in the forefront of the industry.
With excellent product quality, professional technical service and good market reputation, Kunshan Autofits Technology Co.,Ltd. has won the trust and support of our customers. We look forward to working with more partners hand in hand, to achieve long-term win-win relationship, and jointly promote the prosperity of the electronic components industry.
Where is your company located?
We are located next to Shanghai, the largest city in China, and Kunshan, the first economic county in China. With convenient transportation and developed logistics, it provides a good geographical advantage for our electronic components sales business.
What types of electronic components does your company mainly sell?
We are committed to providing many types and brands of electronic components, including but not limited to Sensors, Switches & Relays, Connectors, Circuit Protectio, Power Supplier & Cable, etc. We have established relationships with many well-known electronic component manufacturers. We have established long-term and stable relationships with many well-known electronic component manufacturers to ensure that the products we sell are of reliable quality and reasonable price.
What are the prices of your products?
Our product prices vary according to market conditions and product models. We are committed to providing high quality electronic components at fair and reasonable prices, and offer our customers a variety of incentives and flexible purchasing methods.
How to purchase your electronic components?
You can contact our customer service staff directly by phone, whatsapp, email, our official website. We support a variety of payment methods, and provide you with fast and safe logistics and distribution services.
How do you guarantee the quality of your products?
We attach great importance to product quality, all the electronic components we sell come from regular channels and undergo strict quality testing. We promise to provide customers with high-quality electronic components, and provide perfect after-sales service to ensure that customers have no worries in the process of use.
If I am not satisfied with the electronic components I purchased, can I return them?
We provide perfect after-sales service, if you are not satisfied with the purchased electronic components, you can return or exchange them within the specified time. Please refer to our official website or consult our customer service staff for the specific return policy and process.
Can your company provide technical support and solutions?
We have a professional technical team that can provide technical support and solutions for our customers. Whether you encounter any problems in choosing or using the products, we will be happy to answer your questions and provide professional technical support.
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You can contact our customer service personnel through the online customer service system on our official website, telephone, e-mail or social media platforms. Our customer service staff will provide you with professional services and answer any questions you may have.
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In order to give back to our customers, we will organize various promotions from time to time, including discounts, full reductions, giveaways and so on. Please keep an eye on our official website or social media platforms to stay up-to-date with the latest promotions.
