Siemens 6ES7 221-3AD30-0XB0 DIGITAL INPUT SB 1221 6ES7221-3AD30-0XB0
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Siemens 6ES7221-3AD30-0XB0 Digital Input SB 1221
Product Overview
The Siemens 6ES7221-3AD30-0XB0 is a SB 1221 digital input signal board designed for direct installation on SIMATIC S7‑1200 CPUs. It provides a compact and cost-effective way to expand the digital input capability of the controller, allowing connection to field binary devices such as pushbuttons, limit switches, proximity sensors, and other 24 V DC switching devices. As a plug-in signal board, it occupies minimal space and is widely used in small automation systems, control cabinets, machinery, and building automation applications requiring flexible I/O extension.
Main Functions
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Digital Input Signal Acquisition
- Captures and converts external 24 V DC binary switching signals into logical signals for the S7‑1200 CPU.
- Provides reliable detection of ON/OFF states from field sensors and manual operating devices.
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Input Filtering and Anti-Interference
- Built-in input filtering suppresses electromagnetic interference and contact bounce, ensuring stable and accurate signal detection.
- Improves operational stability in harsh industrial environments with high electrical noise.
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Voltage and Wiring Compatibility
- Supports 24 V DC nominal input voltage, matching standard industrial sensor and actuator systems.
- Allows flexible wiring configuration to suit different field device types.
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Status Indication
- Equipped with LED indicators for each input channel to show real-time signal status.
- Supports quick on-site diagnostics and visual monitoring of input activity.
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Direct CPU Integration
- Plugs directly into the onboard signal board socket of the S7‑1200 CPU without tools or additional mounting components.
- Requires no extra space in the control cabinet and simplifies system wiring.
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System Diagnostics
- Integrates with the S7‑1200 CPU diagnostic system for status monitoring and fault detection.
- Supports automatic module recognition by the controller for fast commissioning.
Technical Features
表格
| Parameter | Specification |
|---|---|
| Product Model | 6ES7221-3AD30-0XB0 |
| Product Series | SIMATIC S7‑1200, SB 1221 Signal Board |
| Module Type | Digital Input Signal Board |
| Number of Input Channels | 4 channels |
| Nominal Input Voltage | 24 V DC |
| Input Delay | Integrated hardware filtering |
| Isolation | Non-isolated (CPU-integrated signal board) |
| Operating Voltage | Supplied by S7‑1200 CPU internal logic |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 10% – 95% non-condensing |
| EMC Compliance | EN 61131‑2, EN 61000‑6‑2, EN 61000‑6‑4 |
| Protection Class | IP20 |
| Installation | Directly plugged onto S7‑1200 CPU |
Product Dimensions
- Width: 19 mm
- Height: 62 mm
- Depth: 40 mm
- Extremely compact dimensions designed specifically for CPU-mounted expansion
Weight
- Net weight: Approximately 0.02 kg
- Gross weight (with packaging): Approximately 0.04 kg
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.
How to contact your customer service?
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.
Does your company often organize promotional activities?
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.
