The unit captures the time and date of up to 32,768 line events (auto stop or overwrite) on 16 lines, which can later be replayed step-by-step for evaluation. The display shows the line states and the previous 40 changes that have occurred. Voltages can be monitored from 12 V to 240 VAC/DC, without any need to program, select or configure the inputs. Applications include monitoring, logging and fault finding for control systems, security systems, heating and ventilation systems, production machinery, lift control gear, etc.