Hi EE365 members, I received this question by email and wanted to see what you think... thanks!
I have a question about a Fisher 5200 DVC installed on a SIS valve with a solenoid.
The DVC is configured as ETT (energize to trip) while the solenoid is configured DTT (deenergize to trip). The valve is a trip valve with no control function.
So my question is, in case of a SIS trip demand, will the DVC do anything i.e. can we consider the DVC and the solenoid as 1oo2 voting to cut of the air supply and trip the valve.
The opposite situation, if the DVC was set as DTT in this configuration would it be considered 1oo2 with the solenoid.
Appreciate you guidance.