StarTech.com ICUSB2321FIS USB to RS232 Serial Adapter Cable

• Brand: StarTech.com
• Model / SKU: ICUSB2321FIS
• Product Type: USB to RS232 Serial Adapter Cable
• Number of Ports: 1
• Host Interface: USB 2.0
• Host Connector: USB-A, 480Mbps
• Serial Connector: DB-9, 9-pin
• Serial Protocol: RS232
• Chipset: FTDI FT232RL
• Maximum Baud Rate: 921.6Kbps
• FIFO: 256 bytes
• Data Bits: 7, 8
• Stop Bits: 1, 2
• Parity: None, Odd, Even, Mark, Space
• Optical Isolation: 2500Vrms
• Surge Protection: 500W bidirectional circuits
• Cable Length: 2.5m / 8.3ft
• Power Source: USB-powered
• Operating Temperature: 0°C to 55°C / 32°F to 131°F
• Storage Temperature: -20°C to 85°C / -4°F to 185°F
• Operating Humidity: 5% to 95% RH
• Product Material: Plastic
• Product Color: Black
• Product Weight: 107g / 3.8oz
• Product Length: 2.5m / 8.3ft
• Product Width: 1.6in / 40mm
• Product Height: 0.8in / 20mm
• System Requirement: One available USB 1.1 or better port
• OS Compatibility: Windows, Windows Server, macOS and Linux versions specified by StarTech
• Microsoft WHQL Certified: Yes
• Compliance: TAA, RoHS, REACH, WEEE, CE, FCC, RCM
• Package Quantity: 1
• Included: USB to RS232 serial adapter
• Technical Support: Lifetime
• Compatibility — Short: USB-A host to RS232 DB9 equipment
• Model Comparison — Short: ICUSB2321FIS adds 2500Vrms optical isolation and supports up to 921.6Kbps; ICUSB2321F provides standard RS232 connectivity up to 115.2Kbps.

Why Choose This Product?

• Protects sensitive serial equipment — 2500Vrms optical isolation provides an important electrical barrier for installations involving sensitive or industrial equipment.
• Supports high-speed RS232 communication — Up to 921.6Kbps provides substantial headroom for compatible applications requiring faster serial transfers.
• Extends the useful life of legacy infrastructure — Enables modern USB-equipped computers to continue communicating with RS232 equipment without replacing compatible legacy hardware.
• Uses the FTDI FT232RL chipset — Provides a widely deployed USB-to-serial architecture with COM-port retention and configurable serial parameters.
• Reduces installation complexity — Integrated 2.5m cable and USB-powered design avoid the need for a separate serial cable and external power adapter.
• Adds interface protection — Optical isolation and 500W bidirectional surge protection provide additional protection for specified electrical conditions.
• Supports mixed IT environments — Compatibility with specified Windows, Windows Server, macOS and Linux versions helps simplify deployment across heterogeneous systems.
• Supports enterprise procurement requirements — TAA compliance, Microsoft WHQL certification, 2-year warranty and lifetime technical support provide useful procurement and lifecycle considerations.