The HM2 and HM4 are the hourmeters modules developed for the MultiCon units. Allow to measure period of time between START and STOP signals, as well as sum of periods. These modules are ideal solution to control working time of a machinery, duration of phenomena or for maintenance purposes. The HM2 and HM4 have 2 and 4 independent couters respectively. Each counter is equipped with 2 inputs - START/STOP and programmable, which can be set as asynchronous RESET, HOLD or used as independent digital input.