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Black metal box with four DB-9 ports and one USB-B port

STARTECH

STARTECH ICUSB234854I 4-Port USB to RS-232/422/485 Serial Adapter usb converter

SKU CH-7HV0-K6SH1 MPN ICUSB234854I

Adds four serial ports with 15 kV ESD protection over USB 2.0, supporting RS-232, RS-422 and RS-485 modes in a rugged metal housing

  • Type4-Port Industrial USB to RS-232/422/485 Serial Adapter
  • ColorBlack
  • Cable LengthNo
  • Changer TypeUSB to RS-232/422/485 Serial
  • SpecificationsConverts a single USB port into four RS232/RS422/RS485 seria
  • Connector A1 x USB Type-B (4 pin) USB 2.0 Female
  • Add four COM ports for legacy serial gear via one USB 2.0 connection
  • 15 kV ESD protection guards equipment against surges and noise
  • Four DB-9 ports support RS-232, RS-422, 4-wire and 2-wire RS-485 modes
  • Rugged IP30 metal housing with DIN-rail or wall-mount options for industrial use
  • Data rates up to 921.6 Kbps ensure reliable throughput for automation tasks

Industrial USB-to-Serial Hub

The StarTech ICUSB234854I converts one USB 2.0 Type-B connection into four DB-9 serial ports that operate in RS-232, RS-422, 4-wire RS-485 or 2-wire RS-485 modes. Each port supports baud rates up to 921.6 Kbps and is protected by 15 kV ESD Level 4 circuitry. A rugged IP30-rated metal enclosure houses the electronics.

Build Integration

The adapter draws power from the USB bus and requires no external supply, freeing a wall outlet and reducing cable count. Its screw-locking USB Type-B receptacle secures the host link against vibration, while DIN-rail or wall-mount brackets let you fix the 4.60 x 3.50 x 1.00 inch, 400 g unit inside cabinets or on panels. Four male DB-9 connectors provide direct attachment for legacy PLCs, meters or industrial terminals.

Target Users

Engineers maintaining factory automation, building-management or laboratory equipment gain four configurable COM ports from a single laptop or panel PC USB port. Buyers who need isolated ports, higher channel counts or fibre-linked serial links should look at alternative products, as this model provides neither galvanic isolation nor fibre interfaces.

Highlights

  • Add four COM ports for legacy serial gear via one USB 2.0 connection
  • 15 kV ESD protection guards equipment against surges and noise
  • Four DB-9 ports support RS-232, RS-422, 4-wire and 2-wire RS-485 modes
  • Rugged IP30 metal housing with DIN-rail or wall-mount options for industrial use
  • Data rates up to 921.6 Kbps ensure reliable throughput for automation tasks

Specifications

BrandStarTech.com
ModelICUSB234854I
Type4-Port Industrial USB to RS-232/422/485 Serial Adapter
ColorBlack
Cable LengthNo
Changer TypeUSB to RS-232/422/485 Serial
SpecificationsConverts a single USB port into four RS232/RS422/RS485 serial ports over USB 2.0 with four modes: RS232, RS422, 4-wire and 2-wire RS485
15 kV ESD protection (Level 4) against noise emissions and electrical voltage surges
DIN rail and wall mountable
Rugged IP30 rated metal hub housing and screw-locking host connection, ideal for harsh industrial environments
Data transfer baud rate up to 921.6Kbps
COM port expansion with COM retention
Powered by USB, and features plug-and-play installation
Connector A1 x USB Type-B (4 pin) USB 2.0 Female
Connector B4 x DB-9 (9 pin, D-Sub) Male
FeaturesAdd four extra COM ports to your laptop or desktop computer, quickly and easily. This USB to RS232/422/485 serial adapter lets you connect to your serial devices through an external USB port.
Supports multiple serial protocols
The versatile serial adapter converts a single USB port into four RS232/RS422/RS485 serial ports, enabling you to connect, monitor, and control a wide range of serial devices, such as sensors, barcode scanners, and LED signage. It supports four operating modes, including RS232, RS422, 4-wire and 2-wire RS485.
Ideal for harsh environments
With its rugged IP30-ra
Dimensions4.60" x 3.50" x 1.00"
Weight14.1 oz / 400g
Shipping weight0.91 kg
Package size406 × 305 × 254 mm

Questions about this item

What is the maximum baud rate each of the four ports can sustain?

Each port supports data transfer up to 921.6 Kbps across RS-232, RS-422 and RS-485 modes.

How much power does the adapter draw from the USB 2.0 host when all four ports are active?

The adapter is bus-powered over USB 2.0 and includes 15 kV ESD protection to handle voltage surges during continuous operation.

Does the host computer need a USB Type-B cable to connect this adapter?

Yes, the adapter has a USB 2.0 Type-B female port, so you must supply a USB Type-A to Type-B cable.

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