This 32-Channel Relay Board is one of our most popular for industrial customers. This controller has a USB interface powered by the FTDI FT232RL Virtual COM Port interface chip, making it cross platform compatible. Users may easily replace the USB interface for other technologies, such as RS-232, Ethernet, Wifi, Bluetooth, and many industrial wireless solutions. UXP and XR Expansion Ports allow high-resolution analog to digital conversion, contact closure inputs, and potentiometer outputs.