Anyone know if power is needed in a garage door switch?

Other Hardware General Electronics
1

This is probably a silly question.

I've got a powered garage door - the roller type. The control box is similar to this...linkcontrols AE0900 pdf.

I don't currently have a manual switch connected to the connectors on the bottom left of the board. What I want to do is add some reed switches to detect if the door's open, add a timed automatic close, and add an override if I don't want it to close automatically.

So, before I even get into putting a board in there... does anyone know if I need to put any power into those connectors to make them work, or would it more likely be just a short between a switched connector and the "COM" connector?

I just didn't want to accidentally electrocute myself without asking first.

Ta
Matt

2

No power needed, just connect between COM and required switch(s) (OPEN, CLOSE, STOP, PHOTO).
Note the PHOTO/STOP switches are normally closed, press to open and the OPEN/CLOSE switches are normally open, press to close.
Not sure what the photocell is used for but it and the stop switch are factory linked to common.

3

Many thanks for this - exactly what I needed. I can now start working out which relays to use to short them.

I believe the photocell is for safety when the door is shutting rather than open/closed checking.

4

Mine actually let me insert an LED across the switch so I have a visual indication of where the switch is in the dark.