Modifying the 3-out-of-2 type using two-way three-port solenoid valves, air circuit connection method
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I suddenly remembered that pressure transmitters use a 3-out-of-2 configuration; therefore, solenoid valves can also use such a configuration. Let’s think about how the air circuit can be designed
A pressure transmitter is a sensor, while a solenoid valve is an actuator. What do you want to take out of the solenoid valve?
“The pressure transmitter has a three-to-two configuration – what is the value of that? Please make it explicit.
It’s what people usually refer to as taking the average of two out of three values; in other words, if two out of the three transmitters show faulty readings, an interlock is activated. What I’m asking about is a 2-out-of-3 solenoid valve arrangement, which means that when two out of the three solenoids lose power, the control valve will activate in a fail-safe manner
Usually, the interlocks are safety interlocks, and there is no need to set them identically to the instruments that measure values.