VirtualMonitoring
- Feb 5, 2010
- 12
- Joined
- Feb 5, 2010
- Messages
- 12
I am looking at the possibility of connecting alarm panel wiring to DB9 serial ports and want to find out which pins are safe to experiment with.
Basically, all we have to work with is either a single output that switches from 0v to 12vDC - or the other way around. Alternatively, we have dry contacts that are either normally open or normally closed.
Is there a pin, or pair of pins that we could connect to on a 9 pin DB9 in order to get the serial port to "do something" ?
By "do something", I mean send a mesage to whatever software is connected to it. It doesn't matter what the message is, just anything that lets us know that the state of one or more of the pins has changed.
Basically, all we have to work with is either a single output that switches from 0v to 12vDC - or the other way around. Alternatively, we have dry contacts that are either normally open or normally closed.
Is there a pin, or pair of pins that we could connect to on a 9 pin DB9 in order to get the serial port to "do something" ?
By "do something", I mean send a mesage to whatever software is connected to it. It doesn't matter what the message is, just anything that lets us know that the state of one or more of the pins has changed.