Logic display board, for a front panel mounting with functions of hour counting (total incremental and partial decremental), with a 2×8 character backlighted display and buttons for fast programming. It runs an interface board equipped with a free contact “ON Relay” for lamps driving, five opto coupled inputs for lamps monitoring, two analogical inputs for irradiance and temperature probe (if connect) and two relay for alarms one with dry contacts and one powered from the mains.

UVDY 04 is the best logics for a replacement of mechanical hour counting or the cheaper logics for small installations that  require good performance in terms of control.