# Siemens SIMATIC S7-1200 SM 1221 Digital Input Module 6ES7221-1BF32-0XB0, 8 Channels, 24V DC

**URL:** https://aio.lv/en/product--siemens-6es7221-1bf32-0xb0--1778452
**Data updated:** 2026-05-18 02:40 (EEST)
**Category:** Server Parts & Components
**Manufacturer:** Siemens
**Manufacturer code:** 6ES7221-1BF32-0XB0
**EAN:** 6940408101913
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 168.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 139.66 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-6es7221-1bf32-0xb0--1778452

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.89 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

The Siemens 6ES7221-1BF32-0XB0 is a digital input module designed for the SIMATIC S7-1200 programmable logic controller system. It features 8 input channels operating at 24V DC. This expansion module is engineered for industrial automation tasks, providing reliable signal acquisition for control processes. It ensures seamless integration into S7-1200 configurations, supporting efficient monitoring and data processing in various automated industrial applications.

## Long description

The Siemens SIMATIC S7-1200 SM 1221 digital input module is a high-performance expansion component designed specifically for the S7-1200 programmable logic controller series. This module provides 8 digital input channels, allowing for the precise acquisition of 24V DC signals from external sensors, switches, or other industrial devices. It is engineered to integrate seamlessly into existing automation architectures, ensuring reliable data transmission and robust performance in demanding industrial environments.
Advantages
This digital input module offers exceptional reliability and ease of integration within the Siemens SIMATIC ecosystem. By utilizing standardized 24V DC signal processing, it ensures compatibility with a wide range of industrial sensors and control equipment. The compact design allows for efficient use of space within control cabinets, while the high-quality construction guarantees long-term operational stability and reduced maintenance requirements for automated control systems.
Suitable for
Industrial automation and process control systems
Signal acquisition from proximity switches and limit sensors
Monitoring of machine status and operational states
Integration into complex PLC-based control architectures
When it may not be suitable
This module is not suitable for applications requiring AC voltage input or high-voltage signal processing, as it is strictly designed for 24V DC operation. It is also not compatible with PLC systems outside of the SIMATIC S7-1200 product family.
Key specifications
Number of digital inputs: 8
Input voltage: 24V DC
Compatibility: Siemens SIMATIC S7-1200 series
Mounting: DIN rail
How to use
Installation involves mounting the module onto a standard DIN rail adjacent to the S7-1200 CPU or other expansion modules. Once physically connected via the integrated backplane bus, the module must be configured within the TIA Portal software environment. Wiring should be performed according to the technical documentation, ensuring that the 24V DC power supply is correctly connected to the input terminals to facilitate signal detection from field devices.
What to consider before purchase
Verify that your existing S7-1200 CPU supports additional expansion modules
Ensure the input voltage of your field devices matches the 24V DC specification
Check available space in your control cabinet for proper installation
Usage recommendations: Always ensure the power supply is disconnected before performing any wiring or maintenance tasks. Use shielded cables for signal lines to minimize electromagnetic interference in industrial settings.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.162 kg |
| Nominal output voltage | 24 |
| Product colour | Black |
| Channels quantity | 8 channels |
| Purpose | System power |
| Country of origin | China |
| Package depth | 109 mm |
| Package height | 60 mm |
| Package width | 88 mm |
| Channel type | Source channel |
| Signal direction | Input |
| Module type | Digital |
| DC input voltage | 24 |
| Digital input channels quantity | 8 channels |
| Sustainability compliance | Yes |
| Sustainability certificates | WEEE, RoHS, REACH |

## FAQ

### How much does the Siemens SIMATIC S7-1200 SM 1221 6ES7221-1BF32-0XB0 Input Module cost, and is it available for purchase?

The price is 168.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 17.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Siemens SIMATIC S7-1200 SM 1221 6ES7221-1BF32-0XB0 Input Module be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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

### Where can I download the instructions for Siemens SIMATIC S7-1200 SM 1221 6ES7221-1BF32-0XB0 Input Module?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

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