Where
isolation, switching, logic functions, time delay functions and frequent on/off cycles are required along with time control a solid state relay (SSR) can be used. They are activated by a variety of AC/DC control signals from PLCs, PCs, TTLs or other microprocessor and microcontroller controls.
Absence of moving components, increase long-term reliability. They hardly wear out and there is no contact bounce due to vibration.
In a recent application we hade the chanse to use Omrons H3DS-ML. With some quite impressive specifications like 8 operating time modes, huge time range (0,1ms to 150h), high mechanical and electrical life expectancy, wide operating voltage range and DIN Track mounting (standard 17.5-mm width) is the perfect relay for the job. Low commercial price is also a plus. It's a great piece of equipment.
