Add four ports supporting three serial protocols, to easily connect serial devices to your computer through USB (Universal Serial Bus), with 15k V ESD protection. Add four extra COM ports to your laptop or desktop computer, quickly & easily. This USB (Universal Serial Bus) to RS232/422/485 serial adapter lets you connect to your serial devices through an external USB (Universal Serial Bus) port. The versatile serial adapter converts a single USB (Universal Serial Bus) port into four RS232/RS422/RS485 serial ports, enabling you to connect, monitor, & control a wide range of serial devices, such as sensors, barcode scanners, & LED signage. It supports four operating modes, including RS232, RS422, 4-wire & 2-wire RS485. With its rugged IP30-rated metal hub housing, the serial adapter is built to meet the extreme demands of harsh & mission-critical environments. It provides 15 k V ESD protection, which helps to reduce downtime in industrial environments where communications lines are more prone to noise emissions or sudden spikes in voltage. The serial adapter offers flexible mounting options, with a built-in wall-mounting bracket & included DIN rail mounting kit. It also features a screw-locking host connection plus a screw-locking USB (Universal Serial Bus)-B connector on the included USB (Universal Serial Bus) cable, to prevent accidental disconnections. The serial adapter is equipped with high-speed UARTs, providing fast data rates of up to 921 Kbps in RS232/422/485 operating modes.