# Siemens 3RH2911-2DA11 Auxiliary Contact Block, 1NO + 1NC, Side-Mounted, Spring-Loaded Terminals

**URL:** https://aio.lv/en/product--siemens-3rh29112da11--1840733
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** Siemens
**Manufacturer code:** 3RH29112DA11
**EAN:** 4011209787148
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 12.80 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rh29112da11--1840733

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RH2911-2DA11 auxiliary contact block is designed for side mounting on 3RT2.1 contactors. It features 1 normally open (NO) and 1 normally closed (NC) contact, utilizing reliable spring-loaded terminals for secure electrical connections. This component is essential for expanding the switching capacity of industrial control systems, ensuring precise signal feedback and operational control in various automation applications.

## Long description

The Siemens 3RH2911-2DA11 auxiliary contact block is a high-quality switching component designed for seamless integration with 3RT2.1 series contactors. This side-mounted unit provides an efficient way to expand the control capabilities of industrial automation systems by offering one normally open (NO) and one normally closed (NC) contact. Engineered for reliability, it utilizes spring-loaded terminals to ensure vibration-resistant and secure electrical connections, making it a dependable choice for demanding industrial environments.
Advantages
This auxiliary contact block offers significant benefits for control panel builders and maintenance professionals. The side-mounting design saves valuable space on the DIN rail, allowing for a more compact arrangement of control components. The use of spring-loaded terminals eliminates the need for frequent retightening, which is common with traditional screw terminals, thereby reducing maintenance time and increasing operational uptime. Its robust construction ensures consistent signal feedback and precise switching performance, which are critical for the reliable operation of complex automation sequences.
Suitable for
Industrial automation and control systems
Expanding switching capacity of 3RT2.1 contactors
Signal feedback loops in motor control centers
Automated manufacturing processes
When it may not be suitable
This component is specifically designed for use with Siemens 3RT2.1 contactors and may not be compatible with other contactor series or brands. It is not intended for high-power switching applications, as it is strictly an auxiliary device for control signals.
Key specifications
Contact configuration: 1 NO + 1 NC
Mounting type: Side-mounted
Connection type: Spring-loaded terminals
Compatibility: Siemens 3RT2.1 contactors
How to use
To install the auxiliary contact block, ensure the power to the main contactor is disconnected. Align the block with the side of the 3RT2.1 contactor and snap it into the designated mounting position until it clicks securely. Once mounted, insert your control wires into the spring-loaded terminals by pressing the release mechanism. Ensure that the wires are fully seated and that the connection is firm before restoring power to the system.
What to consider before purchase
Verify the compatibility with your existing contactor model
Ensure the contact configuration (1NO + 1NC) meets your control logic requirements
Check the available space on the side of your contactor for mounting
Usage recommendations
Always verify that the auxiliary contact block is properly seated and that all wiring connections are secure before energizing the circuit. Regularly inspect the terminals for any signs of wear or environmental damage in harsh industrial settings.

## FAQ

### How much does the Siemens 3RH2911-2DA11 Auxiliary Contact Block cost, and is it available for purchase?

The price is 15.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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 13.07.2026 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. All transactions are 100% secure and encrypted.

### 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

https://aio.lv/img/cache/product/1840733/47502300_large.webp