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Black metal 16-port USB-to-serial hub with DB9 connectors and rack ears

STARTECH

STARTECH ICUSB23216FD 16-Port USB 2.0 to RS232 Hub

SKU CH-CZHJ-QKJQX MPN ICUSB23216FD

Adds sixteen RS-232 serial ports to a computer through a single USB 2.0 connection, rack-mountable with daisy-chain expansion and FTDI chipset

  • Adapter typeUSB to DB9 (RS-232)
  • First connector1x USB 2.0 Type B female
  • Second connector16x DB-9 male
  • Product typeUSB-to-Serial Adapter Hub
  • Product colorBlack
  • DetailsBus Type: USB 2.0 Chipset ID: FTDI - FT232RL Interface : Ser
  • Connect 16 serial devices through one USB 2.0 port
  • Retain COM port assignments across reboots with FTDI chipset
  • Daisy-chain multiple hubs for scalable industrial deployments
  • Rack-mount or DIN-rail install in -40 °C to 85 °C environments
  • Each port delivers up to 921.6 Kbps baud rate

Industrial 16-port serial hub

The StarTech ICUSB23216FD converts a single USB 2.0 connection into sixteen RS232 DB-9 ports. It is built for engineers and integrators who must attach legacy serial equipment such as PLCs, barcode scanners or industrial sensors to modern computers without native COM ports. The all-metal chassis supports rack and DIN-rail mounting for permanent installation in cabinets or machine frames.

USB 2.0 bandwidth and per-port baud limit

The hub shares a 480 Mbps USB 2.0 upstream link across all sixteen ports, so aggregate throughput is divided among active connections. Each port can reach 921.6 Kbps with 256-byte FIFO buffers, which suits typical industrial protocols but cannot sustain high-speed bulk transfers on every channel simultaneously. Total available bandwidth therefore sets the practical ceiling for concurrent heavy traffic.

Replaces individual USB-to-serial cables

This unit consolidates up to sixteen separate adapters into one powered device, reducing cable clutter and USB port consumption on the host. Daisy-chaining additional hubs expands the count further without extra host ports. The jump is worthwhile when managing multiple serial nodes in a fixed location; it is not suited for mobile or single-device use cases where a simple cable would suffice.

How it compares

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

Price $384.99
Pricier than about 96% of the 1,430 comparable items (median $14.99).

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Specifications

Product
Brand nameStarTech.com
Model nameICUSB23216FD
Product typeUSB-to-Serial Adapter Hub
Product colorBlack
Adapter typeUSB to DB9 (RS-232)
Ports & slots
First connector1x USB 2.0 Type B female
Second connector16x DB-9 male
Size & build
Cable lengthNo
Product dimensions1.8 in × 4.7 in × 16.9 in
Product weight53.7 oz
Shipping weight2.24 kg
Package size450 × 216 × 64 mm
In the box
In the box1–16-port USB to RS232 hub
1 - USB cable
2 - rack mounting brackets
8 - rack mounting screws
2 - DIN rail mounting brackets
4 - DIN rail mounting screws
4 - washers
4 - nuts
1 - universal power adapter (NA/EU/UK/AU)
1 - driver CD
1 - quick-start guide

Questions about this item

Should I choose the 16-port model or a smaller hub?

The ICUSB23216FD provides 16 DB-9 ports in one rack-mountable chassis, so you only need this model when you must connect that many serial devices to a single USB 2.0 port.

What does the 921.6 Kbps per port mean for my equipment?

Each of the 16 ports can sustain up to 921.6 Kbps baud with 256-byte FIFO buffering, matching the speed requirement of most industrial RS232 instruments.

How does the USB 2.0 interface limit total throughput?

The hub connects via USB 2.0 at 480 Mbps, which is the aggregate ceiling for all 16 ports combined; simultaneous high-speed traffic on every port will share that bandwidth.

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