# Siemens SIMATIC S7-1200 6ES7221-3BD30-0XB0 4DI 200kHz Input Module

Enhance your industrial automation with the Siemens SIMATIC S7-1200 SB 1221 Digital Input Module 6ES7221-3BD30-0XB0. This high-speed 4DI module offers precise 24V DC signal acquisition up to 200 kHz, ideal for demanding machine control and motion applications. It seamlessly expands the capabilities of your Siemens S7-1200 PLC system for faster, more reliable automation processes.

The Siemens SIMATIC S7-1200 6ES7221-3BD30-0XB0 is engineered for exceptional performance in high-frequency automation tasks. Its compact design ensures easy integration directly with S7-1200 CPUs, providing robust control system expansion. This module is perfect for applications requiring accurate high-speed counting, rapid motion control, and efficient OEM equipment operation. If you need fast signal detection for complex automation, this Siemens module delivers.

-   Siemens SIMATIC S7-1200 SB 1221 module with **4 digital inputs**
-   Supports **24V DC** input voltage for broad compatibility
-   Achieve precise signal detection with up to **200 kHz switching frequency**
-   Compact signal board design for direct **Siemens S7-1200 CPU integration**
-   Optimized for high-speed counting and advanced **industrial automation**

## Specifications

-   Product Name: Siemens SIMATIC S7-1200 SB 1221 Digital Input Module
-   Manufacturer Part Number: **6ES7221-3BD30-0XB0**
-   Brand: Siemens
-   Series: SIMATIC S7-1200
-   Product Type: Digital Input Signal Board SB 1221
-   Digital Inputs: 4 DI
-   Input Voltage: 24 V DC
-   Input Frequency: Up to 200 kHz
-   Application: High-speed industrial automation, motion control, counting, machine control
-   Mounting: Direct integration with S7-1200 CPU

Invest in the reliability and precision of Siemens automation components. The Siemens SIMATIC S7-1200 SB 1221 module 6ES7221-3BD30-0XB0 offers a dependable solution for your critical automation needs. Explore our range of Siemens products for your next project.

## Details

- **Price:** 999.0 USD
- **Vendor:** Siemens
- **Type:** Industrial Automation > Controllers & I/O > Digital Input Modules
- **Tags:** 200kHz input module, 24V DC automation, 6ES7221-3BD30-0XB0, high-speed counting, industrial automation components, S7-1200 signal board, Siemens digital input module, Siemens SIMATIC S7-1200

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 999.00 USD | In stock |

## Images

- Siemens SIMATIC S7-1200 6ES7221-3BD30-0XB0 4DI 200kHz Input Module-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/siemens-s7-1200-6es7221-3bd30-0xb0-input-module)
> Updated: 2026-09-30