# LSiS AU-100 1a1b Side Auxiliary Contact Block for MC-185a to MC-800a Contactors

**URL:** https://aio.lv/en/product--lsis-au-100-1a1b--12468540
**Data updated:** 2026-05-18 09:43 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** LSiS
**Manufacturer code:** AU-100 1a1b
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 13.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 11.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lsis-au-100-1a1b--12468540

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The LSiS AU-100 1a1b is a side-mounted auxiliary contact block designed for use with LSiS MC-185a through MC-800a series contactors. Featuring a 1NO+1NC configuration, this module provides reliable signal feedback and control circuit integration for industrial electrical systems. It ensures seamless compatibility and easy installation for monitoring contactor status in automation and power distribution applications.

## Long description

The LSiS AU-100 1a1b is a side-mounted auxiliary contact block engineered specifically for integration with LSiS MC-185a through MC-800a series contactors. This component serves as a critical interface for control circuits, providing reliable status feedback by monitoring the operational state of the main contactor. Its robust design ensures consistent performance in demanding industrial environments, facilitating seamless automation and power distribution management.
Advantages
This auxiliary contact block offers a high degree of reliability and precision in signal transmission, which is essential for complex control systems. The side-mounting configuration allows for efficient space utilization within electrical panels, keeping the installation footprint compact. Furthermore, the 1NO+1NC contact arrangement provides versatile switching options, enabling both normally open and normally closed logic within a single, integrated unit designed for long-term operational stability.
Suitable for
Industrial automation systems
Power distribution control panels
Motor control centers
Status monitoring of high-capacity contactors
When it may not be suitable
This contact block is not compatible with contactor series outside of the specified MC-185a to MC-800a range. It is also not intended for use in environments where the electrical load exceeds the rated capacity of the auxiliary contacts.
Key specifications
Contact configuration: 1NO + 1NC
Mounting type: Side-mounted
Compatibility: LSiS MC-185a to MC-800a contactors
Application: Control circuit signal feedback
How to use
To install the LSiS AU-100 1a1b, ensure that the main contactor is completely disconnected from the power supply. Align the auxiliary block with the designated side mounting interface on the contactor housing. Secure the unit firmly according to the mechanical locking mechanism provided. Once attached, connect the control circuit wiring to the appropriate terminals, ensuring that the connections are tightened to the specified torque to prevent loose contacts.
What to consider before purchase
Verify the model number of your existing contactor
Ensure sufficient space is available on the side of the contactor for mounting
Confirm that the control circuit voltage matches the contact ratings
Usage recommendations
Always perform a functional test of the auxiliary contacts using a multimeter before energizing the main power circuit to ensure correct signal feedback and logic operation.

## FAQ

### How much does the LSiS AU-100 1a1b Auxiliary Contact Block for MC-185a-800a cost, and is it available for purchase?

The price is 13.49 € (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 08.07.2026 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 LSiS 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 LSiS 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/12468540/68771148_large.webp