Signal problem of electric valve
Thread Content
Can ordinary gate valves be equipped with electric actuators and be changed to electric valves? It is required to have open and close valve position feedback, DCS directly switches the valve, and the on-site/control room can switch the control switch. So there are several DI and DO signals. I personally think there are 2 each. I don’t know, right? It was written on the previous data sheet: close position limite switch: 4-SPDT; OPEN position limite switch: 4-SPDT (did you write it wrong, it should be 1): OPEN position limite switch: 1-SPDT; close TORQUE limite switch: 1-SPDT
You are right. Can be turned into an electric valve. 2 DI, 2 DO. I think it should be 1. Single pole double throw, the most is 2, can't change to 4 contacts.
It should be right. Generally, it is 2DO, 4DI, that is, 2DO on and off. ； Open and close position signals, comprehensive fault signals, on-site and control room switching signals 4DI; this is a general situation. In some cases, over-torque signals are used, starting and stopping at intermediate positions, etc., and there are more DI.DOs.