... power system Main Specifications system: Embedded LINUX operation system, memory: 256M, Hard disk: 160G, roll-storing 1000 the newest recordsPrecision Value: ... optional.4, 16 dry event input channels (12VDC supplied by device internally)5, 16 wet event input channels (24,110,220VDC ... .4, 32 dry event input channels (12VDC supplied by device internally)5, 32 wet event input channels (24,110,220VDC ...