NO & NC Connections Basics

#1

As a quick refresher on Normally Open (NO) / Normally Closed (NC) Relays that are found as the control outputs on the Compressor Controller:

On Compress Controllers Version 2:
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And Compressor Controller Version 3:
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The Compressor Controller is equipped with both NC and NO relay outputs, with the center connection as common, this allows it to work with virtually any type of configuration.

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NO = Normally open (open = open circuit = not creating a path for the current)
NC = Normally closed (closed = short circuit = creating a path for the current)
C = Common

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Existing electrical pressure switch rewiring