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header-product InLine 33307D Serial Converter Repeater Isolator USB 2.0 to RS-485 Black
54.49 €

InLine 33307D Serial Converter Repeater Isolator USB 2.0 to RS-485 Black

InLine 33307D USB 2.0 to RS-485 Serial Converter Photo 1
InLine 33307D USB 2.0 to RS-485 Serial Converter Photo 2
InLine 33307D USB 2.0 to RS-485 Serial Converter Photo 3
InLine 33307D USB 2.0 to RS-485 Serial Converter Photo 4
InLine 33307D USB 2.0 to RS-485 Serial Converter Photo 1
InLine 33307D USB 2.0 to RS-485 Serial Converter Photo 2
InLine 33307D USB 2.0 to RS-485 Serial Converter Photo 3
InLine 33307D USB 2.0 to RS-485 Serial Converter Photo 4

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InLine 33307D Serial Converter Repeater Isolator USB 2.0 to RS-485 Black

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Short description

InLine 33307D serial converter, repeater, and isolator featuring USB 2.0 to RS-485 connectivity. Designed for reliable data transmission and industrial or office communication setups. Compatible with various Windows and macOS operating systems, providing secure signal isolation and stable performance.
Available for order: 49 pcs.
Warranty: 2 Years
SKU: 12649369
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
09.10.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
14.10.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 1.00 kg)
Parcel couriers
Unisend LV / Venipak Pickup LV / Venipak Locker LV / DPD Paku skapis / Omniva LV / Latvijas Pasts pakomāts / Latvijas Pasts nodaļa
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From 1.99 €
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Product information

Description

The InLine 33307D Serial Converter Repeater Isolator USB 2.0 to RS-485 Black is a professional-grade adapter engineered to bridge modern computer systems with serial RS-485 networks. Designed with an integrated galvanic isolation of up to 2.5 kV, this device effectively prevents ground loops and potential differences, safeguarding connected hardware from electrical interference. Utilizing the reliable FTDI FT232RNL chipset, it ensures stable virtual COM port communication with automatic hardware direction switching, removing the need for manual software configurations.

Advantages

This serial converter provides robust electrical isolation that protects sensitive equipment in demanding industrial and office environments. Built-in comprehensive protection mechanisms, including overvoltage, lightning, ESD protection, and a USB PTC fuse, guarantee high operational safety and stable data transmission over long distances. The inclusion of an integrated 120 ohm terminating resistor and a 4-pin screw terminal block simplifies physical integration into existing bus systems. Operating smoothly across a wide temperature range and supporting multiple operating systems, it delivers dependable performance for continuous monitoring and automation tasks.

Suitable for

  • Industrial automation and control systems
  • Building automation and security installations
  • Energy monitoring and smart grid applications
  • Modbus RTU network communication
  • Measurement and laboratory technology setups

This device may not be suitable for applications requiring direct high-speed USB data storage or peripheral connections, as it is strictly specialized for serial RS-485 communication protocols. It is also not intended for consumer multimedia data transfers or high-bandwidth networking tasks.

Key specifications

  • Host interface: USB 2.0 via USB Type-A connector
  • Output interface: RS-485 via 4-pole terminal block
  • Chipset: FTDI FT232RNL
  • Baud rate: 300 to 512,000 bps
  • Galvanic isolation: up to 2.5 kV
  • Transmission mode: Half-duplex with automatic direction switching
  • Dimensions: 22 mm width, 75 mm depth, 11 mm height
  • Color: Black

To use the adapter, connect the USB-A cable from your computer to the host port, and wire the RS-485 bus lines securely into the screw terminal block adhering to the correct pin configuration for ground and data signals. Install the appropriate virtual COM port drivers for your operating system if required, and the hardware will handle automatic direction switching without additional manual configurations. Ensure proper cable routing and make use of the integrated terminating resistor where necessary to maintain signal integrity across the network.

What to consider before purchase

  • Verify that your software environment and operating system are compatible with the virtual COM port drivers
  • Check the physical wiring requirements of your existing RS-485 network to ensure compatibility with the screw terminal block
  • Confirm the required baud rate and transmission distance for your specific communication setup

For optimal reliability and performance in extended RS-485 networks, ensure all wiring connections are securely fastened to the terminal block, maintain proper grounding, and adhere to recommended cable length limits for stable serial data exchange.

All features
Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
0.014 kg
Operating relative humidity (H-H):
5 - 95
Chipset: Set of electronic components in an integrated circuit that manages the data flow between the processor, memory and peripherals. It is usually found in the motherboard of a computer. Chipsets are usually designed to work with a specific family of microprocessors. Because it controls communications between the processor and external devices, the chipset plays a crucial role in determining system performance.
FTDI FT232RNL
Mac compatibility: Product can be used with Apple Mac software and/or hardware.
Yes
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
-15 - 70
Height: The measurement of the product from head to foot or from base to top.
11 mm
Width: The measurement or extent of something from side to side.
22 mm
Depth: The distance from the front to the back of something.
75 mm
Product colour: The colour e.g. red, blue, green, black, white.
Black
Host interface: Interface that enables a host controller to communicate with a driver.
USB 2.0
Country of origin: Country where the device is made. Aka Country of manufacture (COM).
China
Package type: The type of product package e.g. box.
Polybag
Connector 1: This is the first connector in the device.
USB Type-A
Connector 2: This is the second connector in the device.
Terminal block
Output interface: The ports (sockets) where the device is connected via connectors and cables to external devices.
RS-485
Surge protection voltage:
6 kV
Electrostatic Discharge (ESD) protection:
15 kV
Baud rate:
512 Kbit/s
RS-485 signals:
GND
Windows operating systems supported: Windows vesions wich can be used with the device.
Windows 8.1, Windows XP, Windows 10, Windows 11, Windows 8, Windows 7
Mac operating systems supported: Mac operating systems e.g. OS X can be used with the device.
MacOS
Connector gender: To distinguish parts on a cable interface, connectors are grouped under genders. Sockets or jacks are considered to be female whilst plugs are referred to as male.
Male/Female

Description

Machine translation. Load original

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Product comparison

The InLine 33307D USB to Serial RS485 Converter with Isolator and USB-A to 4-pin Terminal is compared with InLine 33307C USB to Serial RS485 Converter with FTDI Chipset, InLine 33307B Serial Adapter USB to RS232 Converter with Isolator, InLine 33307E USB to Serial RS485 Converter with Lightning Protection, and InLine 33307A USB to Serial RS-232 Converter USB-A to 4-pin Terminal. All these devices are designed to bridge USB ports with serial equipment for data communication, but they differ in interface types, chipset implementation, and specialized protection features.

⚙️ The table below compares the RS485 or RS232 interface type, built-in isolator presence, FTDI chipset integration, lightning protection, and terminal connection type.

Comparison parameterInLine 33307DInLine 33307CInLine 33307BInLine 33307EInLine 33307APractical conclusion
Interface typeRS485RS485RS232RS485RS232Determines compatibility with the target serial device standard.
Protection & IsolationBuilt-in isolatorStandard transmissionBuilt-in isolatorLightning protectionStandard transmissionIsolation and surge protection safeguard equipment from electrical interference.
ChipsetStandardFTDI chipsetStandardStandardStandardFTDI chipset ensures high stability and broad operating system compatibility.
Terminal connectionUSB-A to 4-pin terminalStandardStandardStandardUSB-A to 4-pin terminalTerminal block connection facilitates secure wiring in industrial setups.

◎ The suitability table below evaluates which product is best suited for specific user requirements and operational environments.

Use caseRecommended productWhy
Industrial RS485 networks requiring noise immunityInLine 33307DBuilt-in isolator prevents ground loops and signal interference.
Applications demanding maximum driver reliabilityInLine 33307CFTDI chipset provides robust and consistent performance across systems.
RS232 serial communication in electrically noisy environmentsInLine 33307BIsolator ensures secure and stable RS232 data transmission.
Environments exposed to power surges and lightning risksInLine 33307ELightning protection protects connected equipment from high-voltage spikes.
Professional RS232 integration and programmingInLine 33307ADirect terminal connection simplifies wiring for legacy equipment.

The InLine 33307D differs from alternatives by combining RS485 support with a built-in isolator and terminal connection, making it ideal for automation environments where signal security and interference prevention are essential. Buyers should choose it over standard converters when electrical isolation is required.

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Customer reviews

Customer questions

FAQ

How much does the InLine 33307D USB 2.0 to RS-485 Serial Converter cost, and is it available for purchase?

The price is 54.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 49 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 09.10.2026 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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