DRY CONTACT LÀ GÌ

Dears,please let me know what is difference between dry & wet tương tác in relay system with practical examples.

Bạn đang xem: Dry contact là gì

Đang xem: Dry liên hệ là gì?

LikeReplyIrngười … Use mammasfigata.com”s “Search The Site” Box.For example, type in +”Dry Contact”Regards, Phil Corso LikeReply1)A dry contact is a No Volt contact where the tương tác is usually used to indicate an event – movement, closure, alarm, etc.2) A wet tương tác is contact with power applied, usually used khổng lồ energize something – solenoid, light, etc.

Xem thêm: Định Nghĩa Bảo Vệ Là Gì - Nghĩa Của Từ Bảo Vệ Trong Tiếng Việt

LikeReply LikeReply


*

The C-khung set of contacts depicted below is voltage-không lấy phí, or “dry.” They can be associated with a relay, a temperature switch, a limit switch, a pressure switch, a pushbutton, etc. The concept is that at the terminals (represented by the “0” character, there is NO voltage present.—–|/|—–0||————0|—–| |—–0The set of C-khung contacts below is also voltage-miễn phí, or “dry.” Although someone has connected a red indicating lamp khổng lồ the terminals there is no voltage/current source to lớn illuminate the lamp filament (or LED) when the NO (Normally Open) tương tác closes.—–|/|—–0| /|————0——– R ——| / |—–| |—–0—————–The set of C-size contacts below is also voltage-không lấy phí, or “dry.” However, in this case someone has provided a source of voltage current, connected to lớn the COM (COMmon) terminal, connected one side of the red indicating lamp to the NO terminal, and connected the other side of the red indicating lamp to a Neutral, so that when the NO contact closes the red indicating lamp will illuminate. The voltage source (& Neutral) is external khổng lồ the set of contacts–hence, the contacts are still “dry” (voltage-free).


—–|/|—–0||————0—- 2trăng tròn VAC| /—–| |—–0————— R ——– Neutral/ In the C-khung mix of contacts below, an “internal” source of voltage/current is connected to lớn the COM leg of the liên hệ phối. This is usually done internal to the mammasfigata.com system and so the contacts have a source of power that can be used for many (but not all) applications. THIS is considered lớn be a “wet” set of contacts–one which does not require an external source of voltage/current for the load. One simply connects an appropriate load khổng lồ the terminals & the contacts will switch an internal voltage/current source.—–|/|—–0|2trăng tròn VAC——|————0|—–| |—–0Neutral——————-0In the drawing below, a red indicating lamp is connected lớn the “wet” set of C-khung contacts and when the NO liên hệ closes the lamp filament (or LED) will be illuminated. No external source of voltage/current is required–it”s available at the contact terminals.—–|/|—–0|220 VAC——|————0| /—–| |—–0—– R —–/ |Neutral——————-0————-The voltage/current source can be 12 VDC, 5 VDC, 24 VDC, 24 VAC, 110 VAC, 125 VDC, etc.–it all depends on the type device/output being used. The caveat is that one can”t simply connect any load to lớn a wet contact–the ability of the “contact” to supply current has lớn be taken into lớn tài khoản. In other words, you can”t connect a load that requires 3.2 Amps lớn a phối of wet contacts that can only supply 1.0 Amps; well you can, but you can”t expect the load to lớn work for very long & you can expect lớn have sầu khổng lồ replace the contacts or the fuse (if included) in the source.This concludes our wet-/dry contact tutorial for the remainder of all time.


Leave a Reply Cancel reply

Your gmail address will not be published. Required fields are marked *