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

The InLine 33307D is a professional serial converter, repeater, and isolator designed to bridge USB 2.0 and RS-485 interfaces. Featuring a USB-A connection to a 4-pin terminal block, this device ensures reliable data communication and signal isolation in industrial and commercial environments. It offers broad compatibility with Windows and Mac operating systems, making it a versatile solution for connecting legacy serial devices to modern computer systems securely.
Available for order: 43 pcs.
Warranty: 2 Years
SKU: 12649369
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
02.11.2026 {{selectedOffer.officeDeliveryString}}
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Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
05.11.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.03 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 device designed to bridge USB 2.0 and RS-485 interfaces securely and efficiently. Featuring a USB-A connection to a 4-pin terminal block, this converter ensures reliable data communication and signal isolation in demanding industrial and commercial environments. Equipped with the FTDI FT232RNL chipset, it enables stable data transmission via a virtual COM port and supports broad compatibility with various operating systems, making it a versatile solution for connecting legacy serial devices to modern computer systems.

Advantages

This serial converter offers electrical isolation up to 2.5 kV, which effectively protects connected equipment from potential differences, ground loops, and electrical interference. Hardware-based automatic direction switching eliminates the need for manual configuration via software commands or RTS/CTS signals, allowing for quick and straightforward commissioning. Comprehensive safety features such as overvoltage, lightning, ESD protection, and a USB PTC fuse significantly enhance operational reliability. Furthermore, the integrated 120 ohm terminating resistor and screw terminal facilitate seamless integration into existing bus systems for stable signal transmission.

Suitable for

  • Industrial automation systems
  • Building automation networks
  • Measurement and control technology
  • Energy monitoring setups
  • Modbus RTU communication systems

When it may not be suitable

This device may not be suitable if your application requires a direct USB-to-RS232 connection, as it is specifically engineered for RS-485 interfaces. Additionally, networks exceeding 32 devices per segment without an appropriate repeater or systems operating outside standard industrial parameter limits may require alternative hardware configurations.

Key specifications

  • Host interface: USB 2.0
  • Output interface: RS-485
  • Connector types: USB Type-A and 4-pin terminal block
  • Data transfer rate: 300 to 512,000 bps
  • Galvanic isolation: Up to 2.5 kV
  • Chipset: FTDI FT232RNL
  • Color: Black
  • Dimensions: 22 mm width, 78 mm depth, 11 mm height

How to use

To use the device, connect the USB-A cable to an available port on your computer, where operating system drivers will establish a virtual COM port. Connect your RS-485 signal wires and ground to the designated screw terminals on the 4-pin block. Ensure proper polarity for the data lines and configure your software to communicate through the corresponding COM port at the required baud rate. The automatic direction switching and integrated termination resistors will manage the half-duplex communication flow without requiring extra manual interventions.

What to consider before purchase

  • Verify that your peripheral equipment utilizes the RS-485 communication standard
  • Check operating system compatibility with your specific computer environment
  • Assess whether electrical isolation of up to 2.5 kV meets your safety requirements
  • Confirm the physical space availability for the device dimensions of 22 x 78 x 11 mm

Usage recommendations

Always verify wiring polarity and ground connections before powering on the system to ensure stable communication and prevent hardware damage. Keep cable lengths within recommended operational limits and utilize the integrated 120 ohm termination resistor when placing the device at the end of an RS-485 bus segment.

All features
Dimensions (WxDxH): Dimensions of the product (Width x Depth x Height).
22 x 78 x 11
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
Package weight: Weight of the packaged product.
33 g
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.
78 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 depth: The distance from the front to the back of the packaging.
165 mm
Package height: The distance from the top to the bottom of the packaging.
22 mm
Package width: The distance from one side of the packaging to the other.
100 mm
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, Windows 8.1, Windows 11, Windows 10, Windows XP, Windows 7
Mac operating systems supported: Mac operating systems e.g. OS X can be used with the device.
MacOS
Package volume:
400 cm³
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 to RS-485 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 — 43 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 02.11.2026 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.
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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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