# RS-485 Bus Distributor EWIMAR EW-485/4/1/SO with Optical Isolation

**URL:** https://aio.lv/en/product--ewimar-ew-48541so--11776158
**Data updated:** 2026-03-08 22:45 (EET)
**Category:** Network Equipment Accessories
**Manufacturer:** EWIMAR
**Manufacturer code:** EW-485/4/1/SO
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 189.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 157.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ewimar-ew-48541so--11776158

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

EWIMAR EW-485/4/1/SO is an RS-485 bus distributor designed to split and route digital RS-485 connections. The unit includes optical isolation to separate signal grounds and protect against interference and ground loops. Intended for industrial and building automation installations, it enables reliable multi-drop communication and helps maintain signal integrity across longer runs and mixed-ground environments.

## Long description

EWIMAR EW-485/4/1/SO is an RS-485 bus distributor engineered to split and route digital RS-485 connections in industrial and building automation environments. The device provides galvanic separation through optical isolation, reducing the risk of ground loops and electrical interference between connected segments. It supports multi-drop topologies and helps preserve signal integrity over extended cable runs and mixed-ground installations.
Advantages
The distributor's optical isolation separates signal grounds and protects downstream devices from voltage differences and transient disturbances. Its dedicated input and multiple outputs enable straightforward distribution of a single RS-485 line to several branches while maintaining correct differential signalling. Built for installation in control cabinets and on DIN rails, the unit offers a compact footprint suitable for dense wiring panels and supports reliable communication in noisy electrical environments.
Suitable for
Splitting a single RS-485 line to multiple devices in industrial automation
Protecting communication segments from ground loop currents and interference
Extending RS-485 networks across long cable runs and mixed-ground systems
Integration into building management systems (BMS) and control cabinets
Key specifications
Interface: RS-485 differential pair for input and multiple outputs
Isolation: Optical isolation between input and output sections to separate signal grounds
Channels: One input to multiple output channels for distribution
Mounting: DIN-rail compatible enclosure for control cabinet installation
Construction: Compact industrial housing designed for panel integration
Signal preservation: Supports multi-drop communication and long-distance transmission
How to use
Install the distributor on a DIN rail inside a control cabinet or an appropriate enclosure. Connect the RS-485 master or upstream segment to the input terminals and connect each downstream branch to the individual output terminals, observing correct differential pairing (A/B) and any recommended termination. Ensure power and grounding for the overall system follow site practices, while relying on the unit's optical isolation to reduce direct ground coupling between segments. Verify communication using diagnostic tools or monitoring software after wiring.
Usage recommendations
Use shielded twisted-pair cable for RS-485 lines and apply termination resistors at the ends of each segment where required. Keep power and high-voltage wiring separate from communication cabling to minimize interference. When deploying in electrically noisy environments, confirm isolation integrity and signal levels during commissioning to ensure stable multi-drop operation.

## FAQ

### How much does the RS-485 Distributor EWIMAR EW-485/4/1/SO cost, and is it available for purchase?

The price is 189.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 03.07.2026 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 RS-485 Distributor EWIMAR EW-485/4/1/SO 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 EWIMAR 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 EWIMAR 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/11776158/68517669_large.webp