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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

  • Adapter typeUSB to RS-232/422/485 Serial
  • First connector1 x USB Type-B (4 pin) USB 2.0 Female
  • Second connector4 x DB-9 (9 pin, D-Sub) Male
  • Product type4-Port Industrial USB to RS-232/422/485 Serial Adapter
  • Product colorBlack
  • DetailsConverts a single USB port into four RS232/RS422/RS485 seria
  • 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.

How it compares

Measured against everything we stock in USB Adapter Cables & Dongles, at today’s prices. Recalculated every night.

Price $218.99
Pricier than about 93% of the 1,430 comparable items (median $14.99).

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Specifications

Product
Brand nameStarTech.com
Model nameICUSB234854I
Product type4-Port Industrial USB to RS-232/422/485 Serial Adapter
Product colorBlack
Adapter typeUSB to RS-232/422/485 Serial
Ports & slots
First connector1 x USB Type-B (4 pin) USB 2.0 Female
Second connector4 x DB-9 (9 pin, D-Sub) Male
Size & build
Cable lengthNo
Product dimensions4.6 in × 3.5 in × 1 in
Product 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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