8 Channel Failsafe SSR with isolated load sensing circuit

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Ventura Aerospace was presented with a unique challenge from a customer. Their current Solid State Relay (SSR) solution for opening and closing a valve was experiencing start up failures. The typical failure mode of an SSR is to fail to the closed position. The problem was that if the SSR failed at start up the connected valve would open out of sequence resulting in possible test article damage.

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