# Siemens 3SK1111-1AW20 Safety Relay, 110-240V AC/DC, 3NO/1NC Contacts

**URL:** https://aio.lv/en/product--siemens-3sk1111-1aw20--1778999
**Data updated:** 2026-05-18 02:40 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3SK1111-1AW20
**EAN:** 4011209913516
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 251.49 €
**Prices and availability valid until:** 2026-08-07 23:59
**Price without VAT (21%):** 207.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3sk1111-1aw20--1778999

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3SK1111-1AW20 is a high-reliability safety relay designed for industrial automation and machine safety systems. It operates on a wide voltage range of 110-240V AC/DC and features 3 normally open (NO) and 1 normally closed (NC) contacts. This device is essential for monitoring safety circuits, ensuring reliable shutdown in emergency situations, and maintaining operational safety in various industrial environments.

## Long description

The Siemens 3SK1111-1AW20 safety relay is a robust and reliable component engineered for industrial automation and machine safety applications. It serves as a critical link in safety circuits, designed to monitor emergency stop buttons, safety gates, and other protective devices to ensure immediate and secure machine shutdown when a hazard is detected. With its versatile power input, this relay integrates seamlessly into diverse electrical control systems, providing consistent performance and high operational reliability in demanding industrial environments.
Advantages
This safety relay offers exceptional flexibility due to its wide-range power supply, which supports both AC and DC voltages between 110V and 240V. Its compact design allows for efficient use of space within control cabinets, while the combination of three normally open and one normally closed contacts provides the necessary configuration for most standard safety monitoring tasks. The device is built to meet rigorous safety standards, ensuring that it maintains high levels of functional safety and durability even under continuous operation.
Suitable for
Monitoring emergency stop circuits in industrial machinery
Managing safety gate and interlock monitoring systems
Integration into safety-critical automation control panels
Protection of personnel and equipment in manufacturing environments
When it may not be suitable
This device is not intended for applications requiring safety functions beyond its specified contact configuration or for environments where the voltage supply falls outside the 110-240V AC/DC range. It is also not suitable for direct control of high-power motors without appropriate intermediate contactors or auxiliary switching devices.
Key specifications
Supply voltage: 110-240V AC/DC
Contact configuration: 3 Normally Open (NO) and 1 Normally Closed (NC)
Application: Industrial safety and automation
Mounting type: Standard DIN rail
How to use
Installation should be performed by qualified personnel in accordance with local electrical regulations. The relay is designed for mounting on a standard DIN rail within a protected control cabinet. Connect the safety sensors, such as emergency stop switches, to the input terminals and wire the output contacts to the machine control circuit or safety contactors. Ensure that all wiring is secure and that the supply voltage matches the specified range before energizing the system. Perform a functional test of the safety circuit after installation to verify correct operation.
What to consider before purchase
Verify that the supply voltage of your control system matches the 110-240V AC/DC range
Ensure the contact configuration (3NO/1NC) meets the requirements of your safety circuit design
Check available space in your control cabinet for DIN rail mounting
Confirm compatibility with existing safety sensors and actuators
Usage recommendations
Regularly inspect the safety relay and associated wiring for signs of wear or damage. Conduct periodic functional testing of the safety circuit to ensure that the relay triggers correctly during emergency stop events, maintaining the integrity of your machine safety system.

## FAQ

### How much does the Siemens 3SK1111-1AW20 Safety Relay cost, and is it available for purchase?

The price is 251.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 27.07.2026 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 3SK1111-1AW20 Safety Relay 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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