Valve positioner wiring method
Thread Content
When encountering a locator, we generally connect a 4–20mA signal. But this locator has two terminals; one is marked 2W and the other is marked 3/4W. Which signal terminal should I connect to?
2W should be a 2-wire system, while 3/4W is likely a 3-wire or 4-wire system; you can try each one one by one – they won’t get damaged.
It seems this is the only option. . . Adjust it after power is supplied in the later stage.
2W is a two-wire system, and most regulators are connected using this two-wire approach.
Read the instructions! Read the instructions! Read the instructions! Important things are said three times! If there’s no manual, ask the purchasing department for one!
There are wiring diagrams on the covers of the positioners, right?
Check whether there is any wiring method behind the junction box cover; take a closer look
Let’s try connecting it to a 2W two-wire system first.