Startech.com Rackmount USB To Serial Adapter Hub ICUSB23216F User Manual

StarTech.com Rackmount USB to Serial Adapter Hub ICUSB23216F Manual

The starTech.com Rackmount USB To Serial Adapter Hub ICUSB23216F adds 16 RS-232 serial ports to a desktop, laptop, workstation, or server through one USB connection. It is designed for environments that need centralized serial connectivity, including industrial automation, point-of-sale systems, telecommunications equipment, laboratory instruments, building-control systems, and legacy devices.

Using an FTDI USB-to-serial chipset, the hub supports serial communication at data rates up to 921.6 Kbps. Each port uses a standard male DB9 connector, making it suitable for connecting equipment such as barcode scanners, receipt printers, PLC controllers, modems, and console-management devices. Individual transmit-activity LEDs make it easier to monitor communication without opening software diagnostics.

The metal enclosure is designed for rack, desktop, or industrial installation. The included rack-mounting hardware helps organize multiple serial connections in server rooms and equipment cabinets, while terminal-block and AC-adapter power options support flexible deployment. Retained COM-port assignments can also simplify administration when devices must remain mapped to consistent software ports.

This 16-port USB serial hub is best suited to IT administrators, system integrators, engineers, and businesses operating multiple RS-232 devices from one host computer. It is not a replacement for an Ethernet serial server when remote network access is required, and users should confirm that their equipment uses RS-232 rather than RS-422, RS-485, or another serial standard.

ICUSB23216F Technical Specifications and Features

• Serial ports: 16 external RS-232 ports with male DB9 connectors.
• Host interface: USB 2.0 through a USB Type-B connector.
• Chipset: FTDI FT232R/FT232RL family USB-to-serial technology.
• Maximum serial baud rate: Up to 921.6 Kbps, depending on the connected equipment and configuration.
• USB transfer rate: USB 2.0 high-speed operation up to 480 Mbps.
• Data formats: Seven- or eight-bit data, one or two stop bits, and common parity options including none, odd, even, mark, and space.
• Buffers: 256-byte transmit FIFO and 128-byte receive FIFO for improved handling of serial data.
• Activity indicators: Individual transmit LEDs for monitoring port activity.
• Installation: Rack-mountable metal enclosure with hardware for organized equipment deployment.
• Power: 12 V DC power input with center-positive Type N connector, plus a two-wire terminal-block power option.
• Dimensions: Approximately 430 mm long, 120 mm wide, and 45 mm high.
• Operating-system support: Compatibility varies by driver and operating-system release; supported platforms include selected Windows, Windows Server, Linux, Mac OS, and Windows CE versions.

How to Set Up the StarTech.com Rackmount USB to Serial Adapter Hub

1. Place the ICUSB23216F on a stable surface or install it in a compatible rack position using the supplied mounting hardware. Leave room around the enclosure for ventilation and cable access.
2. Connect the supplied 12 V DC adapter to the hub and an appropriate AC outlet, or use the terminal-block input only when the installation power source matches the required voltage and polarity.
3. Connect the USB Type-B port on the hub to a USB port on the host computer. Avoid using an unpowered USB hub during initial installation.
4. Install the appropriate StarTech or FTDI driver for the host operating system. Restart the computer if the installer requests it.
5. Open Device Manager, System Information, or the equivalent operating-system utility and confirm that all available serial ports appear without warning symbols.
6. Connect each RS-232 device to a DB9 port. Check the device manual for null-modem or straight-through cable requirements before powering the equipment.
7. Configure the application with the assigned COM port, baud rate, data bits, parity, and stop-bit settings required by the connected device.
8. Send a controlled test command or receive a known data string. Confirm that the expected transmit LED responds.

Disconnect power before changing terminal-block wiring. Do not connect RS-485 or RS-422 signals to the RS-232 ports, and never force a connector into place.

ICUSB23216F Troubleshooting Guide

Computer does not detect the hub

Confirm that the power adapter is connected and that the USB cable is firmly seated. Try a different USB port and connect directly to the host computer. Install or reinstall the correct FTDI driver, then restart the system. If the hub appears with a warning symbol, remove the device from the operating-system device list and rescan for hardware.

One or more serial ports are missing

Check Device Manager or the equivalent system utility for disabled or conflicting COM ports. Disconnect other USB serial adapters temporarily to identify port-number conflicts. Reconnect the ICUSB23216F and verify that the application is using the current assigned COM port.

No data is transferred

Verify the baud rate, data bits, parity, and stop bits at both ends. Confirm whether the equipment requires a straight-through or null-modem cable. Check hardware flow-control settings and inspect the DB9 connectors for bent pins or loose wiring.

Communication is intermittent

Use a shorter, properly shielded serial cable where practical, avoid routing signal cables beside high-power wiring, and ensure that the external power connection is stable. Test one device at a time to isolate a faulty peripheral or cable.

Error messages and support

Generic messages such as “device not recognized,” “access denied,” or “COM port unavailable” usually indicate driver, permissions, port-assignment, or cable issues rather than a universal ICUSB23216F-specific error code. Record the operating system, driver version, port number, connected equipment, and exact message before contacting StarTech technical support. StarTech provides technical support and warranty assistance through its official support channels; retain the product identification and purchase documentation for service requests.

Pros and Cons of the ICUSB23216F 16-Port Serial Hub

Advantages

• High port density: Sixteen RS-232 connections reduce the need for multiple single-port adapters and simplify cable management.
• Fast serial performance: Up to 921.6 Kbps supports many industrial, instrumentation, and control applications.
• Rack-ready design: The metal enclosure and mounting hardware suit server rooms, control cabinets, and test benches.
• Centralized USB connection: One host USB connection provides access to the full serial port bank.
• Useful diagnostics: Individual transmit LEDs provide a quick visual indication of port activity.
• Flexible power installation: AC-adapter and terminal-block options support different deployment environments.

Limitations

• RS-232 only: It does not directly replace an RS-422, RS-485, or network-based serial solution.
• Host-dependent operation: The ports depend on the connected computer and installed drivers, unlike a standalone Ethernet serial server.
• Cable requirements vary: Some devices require null-modem wiring, flow control, or application-specific settings.
• Large enclosure: A 16-port rackmount hub may be excessive for users who need only one or two serial connections.
• Legacy compatibility considerations: Users running newer operating systems should verify driver availability before deployment.

The starTech.com Rackmount USB To Serial Adapter Hub ICUSB23216F is a strong fit for fixed installations that need many local RS-232 ports. Choose a smaller USB serial adapter for occasional connections, or a network serial device when remote access and Ethernet management are essential.