# Siemens 3SK1220-1AB40 Safety Relay for 1/2-Channel Sensors 24V DC

**URL:** https://aio.lv/en/product--siemens-3sk1220-1ab40--1779074
**Data updated:** 2026-06-02 20:07 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3SK1220-1AB40
**EAN:** 4011209913868
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 140.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 116.52 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3sk1220-1ab40--1779074

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3SK1220-1AB40 is a high-quality safety relay designed for monitoring 1-channel or 2-channel sensors in industrial automation systems. Operating at 24V DC, this safety switching device ensures reliable signal processing and emergency stop functionality. It is an essential component for maintaining safety standards in machinery and control circuits, offering robust performance and easy integration into existing safety architectures.

## Long description

The Siemens 3SK1220-1AB40 is a professional-grade safety relay engineered to monitor 1-channel or 2-channel sensors within industrial automation environments. Operating on a 24V DC power supply, this device serves as a critical link in safety-related control circuits, ensuring that emergency stop signals and sensor inputs are processed with high reliability. Its compact design and standardized functionality make it a dependable choice for maintaining operational safety in complex machinery and automated production lines.
Advantages
This safety relay offers exceptional reliability in demanding industrial conditions by providing precise signal monitoring for various safety sensors. Its design facilitates seamless integration into existing safety architectures, reducing installation complexity while ensuring compliance with rigorous safety standards. The device is built for durability, offering consistent performance in emergency stop applications and contributing to the overall stability of machine control systems.
Suitable for
Monitoring emergency stop buttons
Safety gate and position switch monitoring
Industrial automation and control systems
Machinery safety circuits
When it may not be suitable
This device is not intended for applications requiring AC voltage operation, as it is specifically designed for 24V DC systems. It may also not be suitable for environments exceeding the specified environmental protection ratings or for complex safety logic that requires programmable safety controllers rather than standard relay functionality.
Key specifications
Operating voltage: 24V DC
Sensor compatibility: 1-channel or 2-channel
Function: Safety switching and monitoring
Application: Industrial safety circuits
How to use
The relay should be installed within a control cabinet on a standard mounting rail. Wiring must be performed according to the technical documentation, ensuring that the sensor inputs are correctly connected to the designated terminals. Once installed, the device monitors the status of the connected sensors and triggers the safety output based on the input state. Regular testing of the safety function is required to ensure the system remains operational and compliant with safety regulations.
What to consider before purchase
Verify that your control system operates on 24V DC
Ensure the sensor type matches the 1-channel or 2-channel input configuration
Check the space requirements within your control cabinet
Confirm compatibility with existing safety standards in your facility
Usage recommendations
Always ensure that the power supply is disconnected before performing any wiring or maintenance tasks. Periodically verify the integrity of the safety circuit and the functionality of the connected sensors to maintain a high level of operational safety.

## FAQ

### How much does the Siemens 3SK1220-1AB40 Safety Relay 24V DC cost, and is it available for purchase?

The price is 140.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 16.07.2026 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 3SK1220-1AB40 Safety Relay 24V DC 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

## Image

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