# Serial Converter Repeater Isolator W&T 81009

**URL:** https://aio.lv/en/product--wt-81009--430996
**Data updated:** 2025-12-28 21:18 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** w&t
**Manufacturer code:** 81009
**EAN:** 4010344810094
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 188.99 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 156.19 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--wt-81009--430996

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

The W&T 81009 is a compact RS-232 serial converter, repeater, and isolator designed for reliable data transmission. Weighing only 30 g, it ensures efficient signal integrity over long distances. Ideal for industrial applications, it provides electrical isolation to protect devices from voltage spikes, enhancing system stability and safety. Its robust design makes it suitable for various environments, ensuring durability and performance.

## Long description

The W&T 81009 is a compact Serial Converter Repeater Isolator that transmits RS-232 data over plastic duplex fiber up to 80 meters. It derives power from the serial port, eliminating the need for an external power supply in most setups. The device provides electrical isolation to protect connected equipment from voltage spikes and electrical noise while maintaining signal integrity in industrial and other demanding environments.
Advantages
The model 81009 is non-radiating and insensitive to electrical noise, ensuring stable data transmission even in electrically noisy surroundings. Its small form factor and low weight (approx. 30 g) simplify installation and integration. By combining conversion, repetition and isolation functions, it reduces wiring complexity and enhances system safety without additional power wiring.
Suitable for
Extending RS-232 links over distances up to 80 m via plastic fiber
Protecting equipment from voltage spikes in industrial control systems
Environments with high electrical interference where galvanic isolation is required
Compact installations where external power supply is undesirable or unavailable
Key specifications
Interface: RS-232 serial converter, repeater and isolator
Transmission medium: plastic duplex fiber
Maximum distance: up to 80 m
Power: powered from the serial port (no external PSU required in most cases)
Weight: approx. 30 g
Manufacturer: w&t, MPN 81009, EAN 4010344810094
How to use
Connect the RS-232 serial cable from the host device to the 81009 input and attach the plastic duplex fiber to the corresponding fiber connectors. On the remote end, use a compatible fiber-to-RS232 module or another 81009 to restore serial connection. The unit typically powers itself from the serial port so no separate power connection is necessary; verify that the host port can supply sufficient power. Ensure correct wiring and connector orientation before applying signals.
Usage recommendations
Install the 81009 away from strong electromagnetic sources when possible, and verify port power capability during setup. For critical applications, test the link end-to-end and ensure compatible fiber and connector types are used.

## Specifications

| Feature | Value |
|---|---|
| Wavelength | 660 nm |
| RS-232 signals | RXD, TXD |
| Isolation | 1 kV |

### Operational conditions

| Feature | Value |
|---|---|
| Storage temperature (T-T) | -40 - 70 |
| Operating temperature (T-T) | 0 - 50 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Host interface | RS-232 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.03 kg |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |

## FAQ

### How much does the Serial Converter W&T 81009 cost, and is it available for purchase?

The price is 188.99 € (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 07.07.2026 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. 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 w&t 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 w&t 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: host interface, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/430996/64101408_large.webp