Dynatek provides Three Wire Midnight Pulse system which is a master clock generates 12VDC impulse at midnight and all the connected slaves get reset at 00:00 (24H mode).

In this Three Wire Midnight Pulse system, 2 wires are used for supply to connected slaves and remaining 1 wire is used for midnight pulse. DYNATEK Slaves have optocoupler interface to simply accept that as synchronizing Midnight impulse.

This system is used only in the upgrading of older installations where a number of old electric-mechanical clocks exists and have to be gradually updated to digital clocks by using the existing cable network.