Is that mean if I use Pullup on my microcontroller Pin. When ever Dry contact become active I can see Low voltage level on my pin ?It's a relay contact. It will use a pull-up resistor connected to the Micro-controller input.
http://en.wikipedia.org/wiki/Pull-up_resistor
In the figure where you see the switch in line with the resistor, replace the switch with a relay. There are plenty of ways to control a relay, many are on this site.
I was just trying to point out, if their is a "Dry Contact" there must be a "Wet Contact" as well, and thatWikipedia.org
No current: Dry contact can refer to a secondary set of contacts of a relay circuit which does not make or break the primary current being controlled by the relay. Usually some other contacts or device have the job of starting or stopping the primary current being controlled.
Which could be a PLC etc, see post #5!
Max.
Relays, push buttons, micro switches, light switches, etc,etc,etc. Plugging into a receptacle if used as such.Hello Friends,
Somewhere I come to know about Dry Input Contact. Anybody can give me some detailed information about Dry Input Contact?
What will be the circuit if I want to sense Dry Contact using Microcontroller?
Regards,
Mercury power switches are referred to as wet. I've run across them in various industries. With the myriad of contact configuration, it's not surprising that many dry contacts are not rated.I don't think I have ever heard anybody say, "wet contact" (or write it either).
Probably because all contacts are considered to be, "not dry" unless you declare that they are dry.