Dry Contact 2

[TedT]

Can someone please define the term dry contacts? <p> <br><a href=mailto: ttracewicz@atsspartec.on.ca> ttracewicz@atsspartec.on.ca</a><br><a href= > </a><br>

 

[ronhotchkiss]

Dry contacts simply refer to a relay (or other device) contact that does not supply voltage. It is simply a switch. On the other hand, a wet contact is a contact that does supply voltage/current (has a source already connected).<br>
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Dry contacts are generally more versatile but it does require the sensing or switched device to provide the power supply. Take care to understand the ratings of these contacts. The are rated for voltage, current and switching capacity. CAUTION: The switching capacity is generally less than the combination of the rated current and rated voltage. Be sure the contact is appropriate for the circuit you are connecting it to.<br>
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In Europe, a dry contact is called a volt-free contact.<br>
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Hope this helps.

 

[jbartos]

Reference: IEEE Std 100-1992 &quot;The New IEEE Standard Dictionary of Electrical and Electronics Terms&quot;<br>
<br>
Dry contact. One through which no direct current flows.<br>
Examples: Home toggle switch in rooms, electromechanical circuit breaker, electromechanical relay, switchgear, flash light switch, etc.