Solid-state technology relays

With application of solid-state technology, this shortcoming of an electromagnetic relay is automatically overcome. The solid-state relays are available with switching stages as many as from 2 to 16. For special applications, they can be designed for even higher numbers of steps. 

N.5 Electronic technology used in SIS N.5.1 Solid state relays... 

As shown in fig. 1 these protection channels need to interface different subsystems, based on different technologies (solid state, relays, dynamic logic). 

The transition to solid state relay (SSR) technology is feasible, but the gains in terms of integration are balanced out by the complexity of the electronic card (and the cost) that wottld provide readback isolated by voltage bridges. In addition, we are limited by production constraints of the printed circuit that must comply with the... 

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