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How to operate a relay through two parallel relays?

Updated: 3/20/2020
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14y ago

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To operate a relay ( I am calling "third relay") from two separate parallel control relays is called logic "or". Connect the power wire coming in to both of the paralleled relays' switch common contact. ( These relays are up to you to wire their coils and activate.) Depending on the logic required you will wire the third relay coil to the paralleled control relays normally open or normally closed contacts. That is: Do you you want the third relay to go on with the control relays activation or off?

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Q: How to operate a relay through two parallel relays?
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