StarTech.com ICUSB2324852 2-Port USB to Serial Adapter - RS232/RS422/RS485 with COM Retention & FTDI Chipset
Business volume discounts
Technical guidance
Preparation & staging
QC · ON · AB · BC
Product Features
Technical Overview
This adapter supports a versatile range of serial communication standards. Port 1 utilizes a DB9 connector configurable for RS232, RS422, or RS485 operation, while Port 2 features a terminal block dedicated to RS422 or RS485 connectivity. Both ports can operate simultaneously with mixed protocols, offering flexibility for diverse industrial and commercial applications.
The hardware includes advanced features like RS-485 Auto Transceiver Turn Around (ATTA) for efficient half-duplex communication and supports multiple interface modes, including 4-wire RS422 and 2-wire RS485. Backwards compatibility with USB 1.1 ensures broad host support, and the USB-powered design eliminates the need for an external power adapter.
Relevant factors for this section include Host Interface, Platform Supported, Number of Serial Ports (External), Number of USB Ports. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
This adapter delivers critical reliability and ease-of-use features for professional IT and industrial deployments. The rugged screw-lock USB port secures the connection against accidental disconnection in high-vibration environments, while the ability to rename devices simplifies management in systems with multiple adapters.
Simultaneous Multi-Protocol Operation
Both serial ports can function independently with different protocols (e.g., RS232 on one port, RS485 on the other), allowing a single adapter to interface with multiple device types concurrently.
Industrial Durability & Mounting
The included wall-mounting bracket enables secure installation in racks, cabinets, or on walls, making it suitable for permanent installations in control panels or equipment rooms.
Simplified Device Management
COM port assignments are maintained across system reboots, and devices can be renamed for easy identification in Device Manager, reducing administrative overhead.
Deployment / Use Cases
This adapter is ideal for environments where legacy serial equipment must integrate with modern USB-based computers. Common applications include connecting programmable logic controllers (PLCs), barcode scanners, CNC machines, scientific instruments, and older networking gear like routers and switches with console ports.
In industrial automation, the support for RS422 and RS485 enables long-distance communication in noisy environments, while the RS232 capability handles standard serial peripherals. The adapter's compact external form factor and wall-mount option make it suitable for both desktop and fixed installations.
Industrial Control Systems
Interface with PLCs, HMIs, motor drives, and sensors using RS422/RS485 for robust, noise-resistant communication over longer distances.
IT Infrastructure Management
Access console ports on network switches, routers, and servers (RS232) for configuration and troubleshooting without needing legacy serial ports on modern laptops.
Physical Profile
The adapter features a compact external design measuring 1.70" wide by 0.90" high, with a weight of approximately 10.58 oz. Its small footprint allows for discreet placement on a desk or secure mounting using the included bracket. The rugged construction and screw-lock USB port enhance durability in demanding environments.
The physical profile is practical for deployment planning because the dimensions and weight are clearly defined: 0.90" (22.86 mm), 1.70" (43.18 mm), 10.58 oz (300 g). This helps confirm rack, shelf, desk, or cabinet fit before installation.
- Width
- 1.70" (43.18 mm)
- Height
- 0.90" (22.86 mm)
- Weight
- 10.58 oz (300 g)
What's in the Box
The package includes all necessary components for immediate deployment.
Highlights
- Supports RS232, RS422, and RS485 serial protocols
- 2 ports: DB9 (RS232/422/485) and terminal block (RS422/485)
- COM port retention maintains assignments after reboot
- FTDI chipset for reliable driver compatibility
- USB-powered; no external adapter needed
- Backwards compatible with USB 1.1 hosts
- Rugged screw-lock USB port for secure connections
- Includes wall-mounting bracket for fixed installations
- Both ports operate simultaneously with mixed protocols
- 2-year limited warranty and TAA compliant
Specifications
| Specifications | |
|---|---|
| Manufacturer | StarTech.com |
| Manufacturer Part Number | ICUSB2324852 |
| Brand Name | StarTech.com |
| Product Name | 2 Port USB to RS232 RS422 RS485 Serial Adapter with COM Retention |
| Packaged Quantity | 1 |
| Product Type | Serial Adapter |
| Technical Information | |
| Host Interface | USB 2.0 |
| Platform Supported | PC |
| Interfaces/Ports | |
| Number of Serial Ports (External) | 1 |
| Number of USB Ports | 1 |
| Physical Characteristics | |
| Form Factor | External |
| Height | 0.90" (22.86 mm) |
| Width | 1.70" (43.18 mm) |
| Weight (Approximate) | 10.58 oz (300 g) |
| Miscellaneous | |
| Package Contents | 2 Port USB to RS232 RS422 RS485 Serial Adapter with COM Retention Wall Mounting Bracket USB A to B Cable Driver CD Installation Guide |
| Environmentally Friendly | Yes |
| Environmental Compliance | Restriction of Hazardous Substances (RoHS),Waste Electrical and Electronic Equipment Directive (WEEE),Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) |
| Country of Origin | Taiwan |
| TAA Compliant | Yes |
| Warranty | |
| Limited Warranty | 2 Year |
User Manual
FAQ
What serial protocols does this USB adapter support?
This adapter supports RS232, RS422, and RS485 serial communication standards. Port 1 (DB9) can be configured for any of these three protocols, while Port 2 (terminal block) supports RS422 or RS485. This versatility allows connection to a wide range of legacy industrial, networking, and commercial serial devices.
How many serial devices can I connect simultaneously?
The adapter provides two independent serial ports that can function simultaneously. You can connect one device to the DB9 port and another to the terminal block port, and both can operate at the same time, even with different protocols (e.g., RS232 on one port and RS485 on the other).
Does this adapter require an external power supply?
No, the adapter is USB-powered and draws all necessary power from the host computer's USB port. This eliminates the need for an external power adapter, simplifying installation and reducing cable clutter in desktop or rack-mounted deployments.
What is COM port retention and why is it important?
COM port retention means the adapter's assigned COM port numbers in Windows remain consistent after system reboots. Without this feature, Windows might assign new COM port numbers randomly, breaking software configurations that rely on specific ports. Retention ensures reliable, predictable operation in managed IT environments.
Is this adapter compatible with USB 1.1 computers?
Yes, the adapter is backwards compatible with USB 1.1 hosts, though data transfer speeds will be limited to USB 1.1 rates. This ensures broad compatibility with older computers or embedded systems that may only have USB 1.1 ports available.
What is included in the package for mounting and installation?
The package includes a wall-mounting bracket for secure fixed installations, a USB A to B cable for connecting to the host computer, a driver CD with installation software, and a printed installation guide. The bracket allows for neat, organized mounting in racks, cabinets, or on walls in industrial settings.
| Qty | Price | Available |
|---|
