Parker Hannifin Proportional Control Valve

scottmurphy

Member
S
Join Date
Oct 2004
Posts
363
Has anyone had any experience with these valves, I do not have a wiring diagram for them. They have a 24vdc supply, plus a variable control signal I have the supply present, but am showing an open loop on OP card. The PLC is a Quantum, with a sinking AO card, I am thinking that I may need a loop isolator if the proportional amplifier is self powering?
 

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