Dabsbhatti Posted October 5, 2016 Share Posted October 5, 2016 Dear All I currently have a Galaxy G2 44 fitted in my house. I have two keypads installed, currently in a parallel (star config?) from the control panel ie Each has a 680ohm resistor across the AB line and the control panel jumper is disconnected. I would now like to add a 3rd proxy keypad. Can somebody please let me know: Can I just add the new keypad in parallel as well with 680ohm across the AB or do I have to wire it up from one of the existing keypads. When I tried to wire 3 keypads previously (about a year ago when we bought the house) I think one of the fuses blew and all the keypads lost power. I did not connect the 3rd keypad after replacing the fuse, however there is now a requirement for it. Could I be pulling two much power from the panel - there are several devices connected to the bus: 2 x RF portals, 5 x PIR, 2 x keypads, but I thought I could connect up to 4 keypads without any problem. I'd be most grateful if somebody could confirm the wiring configuration for the new keypad for me. Thanks Quote Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted October 5, 2016 Share Posted October 5, 2016 Keypads are on a data BUS so termination resistors will only be at each end of the data BUS. Quote Link to comment Share on other sites More sharing options...
al-yeti Posted October 5, 2016 Share Posted October 5, 2016 As above , but you can star it no problem and put a resistor on at "each" end of line If you blew a fuse you must have shorted something not because of an overload , the connections on the g2 can be tricky for some ,xso look carefully when your doing it and power down if possible , your bell may go nuts while doing it of course Quote Link to comment Share on other sites More sharing options...
Dabsbhatti Posted October 5, 2016 Author Share Posted October 5, 2016 Thanks sixwheeledbeast. So to clarify, I would have to add the new keypad in serial with an existing one (ensuring only one termination resistor is at the end of this bus), and the other keypad would be unchanged terminating the other end of the bus. Quote Link to comment Share on other sites More sharing options...
Dabsbhatti Posted October 5, 2016 Author Share Posted October 5, 2016 Thanks al-yeti You replied while I was responding to sixwheeled beast. Please ignore the above comments I made. Based on your reply: I don't have to add the new keypad in serial with an existing one. I can in fact wire in star config as I tried before with a resistor at each end (and I can do this for all 4 keypads if required). I'll do it without "fat fingers" this time I guess. Is it best to power down as you suggested or can I do it in engineer mode? Thanks again. Quote Link to comment Share on other sites More sharing options...
al-yeti Posted October 5, 2016 Share Posted October 5, 2016 Engineer mode won't help you with short circuits , and as above you can do serial as said with last one being terminated , and also do star config You will have ti make sure you address everything carefully , big house ? To rf portals? Quote Link to comment Share on other sites More sharing options...
Dabsbhatti Posted October 5, 2016 Author Share Posted October 5, 2016 Great Thanks for the info. Two RF portals due to detached garage further out. Quote Link to comment Share on other sites More sharing options...
al-yeti Posted October 6, 2016 Share Posted October 6, 2016 Yes there rf range is very poor with to many objects in the way if you get me Quote Link to comment Share on other sites More sharing options...
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