# InLine 33307C USB 2.0 to RS-485 Serial Converter Repeater Isolator with FTDI Chipset

**URL:** https://aio.lv/en/product--inline-33307c--12649368
**Data updated:** 2026-09-19 04:24 (EEST)
**Category:** Serial & Parallel Cables
**Manufacturer:** InLine
**Manufacturer code:** 33307C
**EAN:** 4043718353149
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.49 €
**Prices and availability valid until:** 2026-10-25 23:59
**Price without VAT (21%):** 24.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--inline-33307c--12649368

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.10.2026 | free |
| Pickup points | 28.10.2026 | 1.99 EUR |
| Courier delivery to door | 28.10.2026 | 4.99 EUR |

## Summary description

InLine 33307C serial converter, repeater, and isolator connects USB 2.0 devices to an RS-485 serial interface. Equipped with a reliable FTDI chipset, this black adapter ensures stable data transmission and galvanic isolation. It is compatible with a wide range of Windows and macOS operating systems, making it ideal for industrial, commercial, and technical applications requiring secure serial communication.

## Long description

The InLine 33307C USB 2.0 to RS-485 Serial Converter Repeater Isolator with FTDI Chipset connects a computer with a USB Type-A port to RS-485 serial devices or bus systems, enabling stable communication via a virtual COM port. Equipped with a reliable FTDI FT232RNL chipset, this black adapter ensures secure data transmission and galvanic isolation, making it suitable for demanding technical environments.
Advantages
This serial converter features automatic hardware-based direction switching for half-duplex operation, meaning that the transition between transmission and reception happens seamlessly without requiring manual software configuration or RTS/CTS signals. Integrated protection mechanisms such as protective diodes, an ESD-protected USB interface, a 200 mA PTC fuse, and a resettable fuse on the RS485 side enhance operational reliability and safety in complex setups. Furthermore, the built-in 120 ohm terminating resistor minimizes signal reflections over long cable runs, while the USB-powered 5 volt output provides convenient auxiliary power for external devices with low current consumption.
Suitable for
Modbus RTU networks
Industrial automation systems
Building automation and control
Measurement and data collection technology
Configuration and diagnostic tasks
When it may not be suitable
This device may not be suitable if your setup requires a full-duplex RS-485 connection, as this adapter is strictly designed for half-duplex operation with automatic direction switching. It is also not intended for high-speed data links exceeding 512 kbit/s or for direct connection to host systems lacking a standard USB Type-A port without appropriate adapters.
Key specifications
Host interface: USB 2.0 Type-A
Output interface: RS-485 via terminal block
Chipset: FTDI FT232RNL
Baud rate: 300 to 512,000 bps
Transmission mode: Half-duplex with automatic direction switching
Maximum cable length: Up to 1.2 km for RS-485, up to 5 m for USB
Power output: USB-powered 5 V output up to 400 mA
Dimensions: Width 22 mm, Depth 78 mm, Height 11 mm
Operating temperature: -40 °C to +85 °C
How to use
To use the adapter, connect the USB Type-A connector to an available USB port on your host computer. Connect the RS-485 wiring to the appropriate terminals using the terminal block configuration, taking note of the ground, data positive, data negative, and power supply assignments. Install the required drivers for the operating system if necessary, and configure your software to communicate through the newly assigned virtual COM port. The built-in status indicators for power, transmit, and receive will help monitor operational status during data exchange.
What to consider before purchase
Verify that your operating system is compatible with the driver requirements, such as Windows versions, macOS, Linux, Android, or Windows CE.
Check the power requirements of your peripheral devices to ensure they do not exceed the 400 mA limit provided by the 5V USB power output.
Assess the network layout to determine if the integrated 120 ohm resistor is sufficient or if additional termination is needed for larger bus segments.
Usage recommendations
Always ensure correct polarity and secure connections at the terminal block before powering on the system, and verify that cable lengths and device counts per bus segment adhere to standard RS-485 operational limits to maintain signal integrity.

## Specifications

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 22 x 78 x 11 |
| Weight | 0.014 kg |
| Operating relative humidity (H-H) | 5 - 95 |
| Chipset | FTDI FT232RNL |
| Package weight | 33 g |
| Mac compatibility | Yes |
| Operating temperature (T-T) | -15 - 70 |
| Height | 11 mm |
| Output voltage | 5 |
| Width | 22 mm |
| Depth | 78 mm |
| Product colour | Black |
| Host interface | USB 2.0 |
| Country of origin | China |
| Package depth | 165 mm |
| Package height | 22 mm |
| Package width | 100 mm |
| Package type | Polybag |
| Connector 1 | USB Type-A |
| Connector 2 | Terminal block |
| Output interface | RS-485 |
| Baud rate | 512 Kbit/s |
| RS-485 signals | GND |
| Windows operating systems supported | Windows 11, Windows 10, Windows XP, Windows CE, Windows 8.1, Windows 8, Windows 7 |
| Mac operating systems supported | MacOS |
| Package volume | 400 cm³ |
| Connector gender | Male/Female |

## FAQ

### How much does the InLine 33307C USB to RS-485 Serial Converter cost, and is it available for purchase?

The price is 29.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 50 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 23.10.2026 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 InLine 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 InLine 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/12649368/69832487_large.webp