The Avalue EPM-1602 is a USB to 4-port RS-232/422/485 module designed for industrial and embedded applications. It provides four serial ports via a single USB 2.0 interface, facilitating seamless connectivity for multiple serial devices. The module operates within a wide temperature range of -40°C to +85°C and features a compact design measuring 142mm x 40mm. With vibration resistance of 5G @ 5~500Hz and shock resistance of 10G @ 11ms, the EPM-1602 ensures reliable performance in harsh environments. Compatible with Windows 7/10 and Linux, it's an excellent choice for industrial automation, transportation, and manufacturing systems.