{{ totalProductsCount }}

In cart {{totalProductsCount}} item(s)

Total:
{{sum | formatAmount}}

Your cart is empty

header-product DeLOCK 90781 Serial Converter Repeater Isolator USB 2.0 RS-232 Black Green
35.49 €

DeLOCK 90781 Serial Converter Repeater Isolator USB 2.0 RS-232 Black Green

DeLOCK 90781 Serial Converter Photo 1
Keep track of price changes You keep track of price changes
Watch the price drop

Leave your address - as soon as the price of the product goes down, you'll know about it right away

You keep track of price changes

DeLOCK 90781 Serial Converter Repeater Isolator USB 2.0 RS-232 Black Green

{{email}}
You keep track of price changes

DeLOCK 90781 Serial Converter Repeater Isolator USB 2.0 RS-232 Black Green

{{email}}
{{selectedOffer && selectedOffer.price | formatAmount}}

Short description

The DeLOCK 90781 is a USB 2.0 RS-232 serial converter, repeater, and isolator designed for reliable data transmission. It features a compact design with dimensions of 31 mm width, 35 mm depth, and 15 mm height. This device is compatible with Windows 10 and 11 operating systems, making it suitable for various applications requiring serial communication.
Available at price 35.49 €: 300 pcs.
Total available for order: 865 pcs.
Warranty: 2 Years
SKU: 11362560
Manufacturer: DELOCK
free shipment

Cheapest delivery:

Venipak Pickup LV, Venipak Locker LV

Pick-up points

Venipak Pickup LV

Venipak Locker LV

Cost

1.89 €

Deliver

{{selectedOffer.parcelStationDeliveryString}}

Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
14.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
17.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.05 kg)
Parcel couriers
Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa
17.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
payment
Payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay
Together cheaper
{{product.price | formatAmount}}
{{product.title}}
{{productBundle.reference.specialPrice | formatAmount}}
{{productBundle.title}}
{{productBundlePreviousPrice | formatAmount}}
{{productBundleSpecialPrice | formatAmount}}

You saving {{productBundleYouSave | formatAmount}}

Product information

Description

The DeLOCK 90781 is a compact USB 2.0 to RS-232 converter that expands a computer’s internal USB port with a serial RS-232 interface. Designed as a small adapter board, it is suitable for installation inside housings or on slot brackets and supports reliable serial data transmission for connected devices and PC applications.

Advantages

The converter combines USB 2.0 connectivity with RS-232 signalling, offering a space-saving board layout with dimensions of 31 mm × 35 mm × 15 mm. It supports remote wake-up and power management features and provides broad compatibility with serial devices. The unit’s compact design makes it convenient for mounting in enclosures or on brackets while maintaining stable data transfer.

Suitable for

  • Connecting legacy serial devices to modern PCs
  • Embedded systems and industrial equipment integration
  • Installation inside computer housings or on slot brackets
  • Applications requiring isolated, stable RS-232 communication

Key specifications

  • Interface: USB 2.0 to RS-232
  • Product dimensions: 31 mm (W) × 35 mm (D) × 15 mm (H)
  • Product colours: Black, Green
  • Compatibility: Windows 10, Windows 11
  • Functions: repeater/isolator features, remote wake-up, power management
  • Manufacturer: DELOCK, MPN 90781, EAN 4043619907816

How to use

Install the converter board into the desired housing or secure it on a slot bracket, then connect the USB 2.0 host cable to the computer’s internal USB port and the RS-232 connector to the serial device. Install any necessary drivers or system updates on Windows 10 or 11 if required. Configure serial port settings (baud rate, parity, data bits, stop bits) in the host application to match the connected device.

Usage recommendations

For reliable operation, mount the adapter in a stable, well-ventilated location inside the enclosure and ensure proper grounding of the RS-232 equipment. Verify driver compatibility with your operating system and confirm serial settings with the peripheral device before operation.

Specifications

Product colour:
Black, Green
All features
Chipset:
FTDI FT231XS
Host interface:
USB 2.0
Output interface:
RS-232
RS-232 signals:
TXD, RXD, RTS, RI, GND, DTR, DSR, DCD, CTS
Electrostatic Discharge (ESD) protection:
15 kV
Data bits:
7, 8
Stop bits:
2, 1
Parity bit:
Even, Mark, N, Odd, Space
Flow Control type:
DTR/DSR, N, RTS/CTS, XON/XOFF
Maximum cable length:
0.3 m

Features

Product colour:
Black, Green
Windows operating systems supported:
Windows 10, Windows 10 x64, Windows 11
Connector gender:
Male

Other features

LED indicators:
Y

Packaging data

Package type:
Box

Packaging content

Manual:
Yes

Logistics data

Country of origin:
China

Weight & dimensions

Height:
15 mm
Width:
31 mm
Depth:
35 mm

Operational conditions

Operating temperature (T-T):
-40 - 85

Similar products

{{product.title}} Show details Hide details

{{highlightedFeature.featureTitle}}:

{{getProductFeatureValueById(product, highlightedFeature.featureId)}}

{{product.price | formatAmount}}
Might be useful
{{product.manufacturerName}}
{{product.categoryName}}
{{product.title}}
{{product.specialPrice}}
{{product.price}}
Stock data
Warehouse Stock Delivery to the store Store Price
WH94 300 14.07.2026 Best delivery 35.49 €
Available only for legal entities
Warehouse Stock Delivery to the store Store Price
EU4 465 28.07.2026 35.99 €
WH109 100 28.07.2026 39.99 €
35.49 €
Stock: 300
Delivery Date: 14.07.2026 Best delivery
Warehouse: WH94
Available only for legal entities
35.99 €
Stock: 465
Delivery Date: 28.07.2026
Warehouse: EU4
39.99 €
Stock: 100
Delivery Date: 28.07.2026
Warehouse: WH109

Customer reviews

Customer questions

FAQ

How much does the DeLOCK 90781 Serial Converter cost, and is it available for purchase?

The price is 35.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 865 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 14.07.2026 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. 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 DELOCK 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 DELOCK 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.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: 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.

Where can I download the instructions for DeLOCK 90781 Serial Converter?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.
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.
shipping
Fast Delivery Get your orders as quickly as possible — right to your door, parcel lockers, or pickup points across Latvia and the EU.
payment
Secure Payment Pay the way you prefer: cash, VISA, MasterCard, Apple Pay, Google Pay, bank transfer, or 0% installment plan.
warranty
Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.