Advantech B&B Electronics USOPTL4-4P USB To RS-422/485 Isolated 4-Port

BB-USOPTL4-4P is an isolated USB-to-RS-422/485 converter from Advantech B&B Electronics that provides four independent RS-422/RS-485 channels through pluggable terminal blocks. The device is powered directly from the USB host (5 V) and uses a USB Type B female connector, with LEDs indicating transmit and receive activity on each channel for quick status at a glance. It delivers 2000 V RMS optical isolation between the USB host side and the RS-422/485 ports and supports RS-422 and RS-485 operation in both 2-wire and 4-wire configurations, making it suitable for multiple serial devices from a single USB port. This 4-port model is designed to connect four RS-422/485 devices to a computer or embedded host for data acquisition, industrial automation, or sensor networks, while protecting the host from electrical surges and preserving signal integrity through robust isolation. The unit is compatible with USB 1.0, 1.1, and 2.0 hosts and uses a high-retention USB connection to withstand field use, while wiring is facilitated by the detachable terminal blocks for each port.