Velleman VM140 EXTENDED USB INTERFACE BOARD This computer interface board has a total of 33 inputs / outputs, including analogue / digital and a PWM output. The connection to the computer via the USB port is galvanically-optically isolated, so that damage to the computer is impossible thus providing a high level of secure implementation. All communication routines are contained in a Dynamic Link https://elecena.pl/product/16456254/extended-usb-interface-board 2020-04-14 https://elecena.pl/product/16456254/extended-usb-interface-board 2020-09-01 https://elecena.pl/product/16456254/extended-usb-interface-board 2021-03-02 https://elecena.pl/product/16456254/extended-usb-interface-board 2025-07-09