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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

  • TypeUSB-to-Serial Adapter Hub
  • ColorBlack
  • Cable LengthNo
  • Changer TypeUSB to DB9 (RS-232)
  • SpecificationsBus Type: USB 2.0 Chipset ID: FTDI - FT232RL Interface : Ser
  • Connector A1x USB 2.0 Type B female
  • 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.

Highlights

  • 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

Specifications

BrandStarTech.com
ModelICUSB23216FD
TypeUSB-to-Serial Adapter Hub
ColorBlack
Cable LengthNo
Changer TypeUSB to DB9 (RS-232)
SpecificationsBus Type: USB 2.0
Chipset ID: FTDI - FT232RL
Interface : Serial
Port Style: External Hub
Ports: 16
Data Bits: 7, 8
FIFO: 256 Bytes
Max Baud Rate: 921.6 Kbps
Maximum Data Transfer Rate: 480 Mbps
Parity: Odd, Even, Mark, Space, None
Serial Protocol: RS-232
Stop Bits: 1, 2
LED Indicators 16 - Data Receive
16 - Data Transmit
Center Tip Polarity: Positive
Input Current: 1.5 A
Input Voltage: 100 ~ 240 AC
Output Current: 3 A
Output Voltage: 12 DC
Plug Type: N
Power Consumption: 36 W Max.
Power Source: AC Adapter Included
Humidity: 20~80% RH (Non-condensing)
Operating Temperature: -40°C to 8
Connector A1x USB 2.0 Type B female
Connector B16x DB-9 male
FeaturesConvert a USB port into 16 RS232 serial ports in an industrial rack-mountable chassis and daisy chain multiple hubs for a scalable solution - 16-Port USB-to-Serial Adapter Hub - USB to RS232 port adapter with FTDI chipset and COM port retention - Rackmountable all-metal chassis - RS232 multiplexer with 921.6 Kbps baud per port - Meets the demands of industrial environments with extended operating temperature range: -40°C to 85°C (-40°F to 185°F)
Dimensions1.80" x 4.70" x 16.90"
Weight53.70 oz.
Package Contents1 - 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
Shipping weight2.24 kg
Package size450 × 216 × 64 mm

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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