# LS MMS-LA 1a1b Auxiliary Signaling Contact 1NO+1NC

**URL:** https://aio.lv/en/product--ls-mms-la-1a1b--12468546
**Data updated:** 2026-05-18 09:43 (EEST)
**Category:** Electronics Accessories
**Manufacturer:** LS
**Manufacturer code:** MMS-LA 1a1b
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 13.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 11.56 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ls-mms-la-1a1b--12468546

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The LS MMS-LA 1a1b is an auxiliary signaling contact designed for integration with compatible circuit protection devices. Featuring a 1NO (normally open) and 1NC (normally closed) configuration, this module provides reliable status feedback for electrical systems. It is essential for monitoring and control applications, ensuring precise signaling of switching states in industrial and commercial electrical installations.

## Long description

The LS MMS-LA 1a1b is a high-quality auxiliary signaling contact designed for seamless integration with compatible circuit protection devices. This module features a 1NO (normally open) and 1NC (normally closed) configuration, providing reliable and accurate status feedback for various electrical systems. It serves as a critical component for monitoring and control applications, ensuring that the switching states of your electrical installations are clearly signaled in both industrial and commercial environments.
Advantages
The primary advantage of this auxiliary contact is its ability to provide real-time status monitoring of circuit breakers and motor protection switches. By offering both normally open and normally closed contacts, it allows for versatile integration into automation and safety circuits. Its robust design ensures long-term operational reliability, minimizing the risk of signaling failures in demanding electrical setups. The compact form factor facilitates easy installation without requiring significant additional space within the control cabinet.
Suitable for
Industrial automation systems
Commercial electrical distribution boards
Motor control centers
Remote status monitoring applications
Safety interlocking circuits
When it may not be suitable
This device is not intended for direct power switching of high-load equipment and should only be used for signaling purposes within its rated electrical parameters. It is not compatible with circuit protection devices outside of the specific LS series for which it was designed.
Key specifications
Contact configuration: 1NO (Normally Open) + 1NC (Normally Closed)
Function: Auxiliary signaling
Compatibility: Designed for LS circuit protection devices
Application: Status monitoring and control
How to use
To install the LS MMS-LA 1a1b, ensure that the main power supply to the circuit protection device is disconnected. Align the auxiliary contact module with the designated mounting interface on the side of the circuit breaker or motor protection switch. Secure the module according to the manufacturer's mechanical locking mechanism. Once installed, connect the signaling wires to the appropriate terminals, ensuring that the wiring complies with local electrical codes and the specific requirements of your control system.
What to consider before purchase
Verify compatibility with your specific model of LS circuit protection device
Ensure the electrical load of your signaling circuit does not exceed the contact ratings
Confirm that there is sufficient physical space within the enclosure for the additional module
Usage recommendations
Always perform a functional test of the signaling circuit after installation to ensure that the 1NO and 1NC contacts trigger correctly in response to the switching state of the main device.

## FAQ

### How much does the LS MMS-LA 1a1b Auxiliary Signaling Contact cost, and is it available for purchase?

The price is 13.99 € (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 06.07.2026 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 LS 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 LS 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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