Patlite NHV4 Series Multicolour Signal Tower Base Unit with Digital I/O
The NHV4-0DN is the base unit of the NHV4 series Multicolour Signal Tower with Voice Annunciator. The NHV4-0DN is the base unit and is only compatible with NHV4 series. NHV-0DN is the Standard NHV model plus 4 digital inputs and 2 digital outputs, which makes it easy to connect with various digital devices.