NX12 -> NX4 wiring

[nat]

I had an NX12 installed about 10 years ago which during renovations 18 months ago developed serious issues. I got a tech out, he removed the mainboard, tagged and labelled all the cabling, tested the mainboard in the shop and told me it was basically fried.

After doing some research I realised an NX12 is overkill anyway as we only had 3 zones. So I bought an NX4 kit with a shiny new touchpad from the local Hills outlet.

Not having the old NX12 still wired in to compare to the NX4 I have a couple of questions relating to wiring:

1) Do the zone positive wires terminate at the keypad+ terminal?

2) Do the zone negative wires terminate at any COM- terminal?

3) Which zone wires are common? Blue or white?

4) Is there any need to add EOL resistors for the NX4 to work or would this have been done already when the NX12 was installed?

Nat.

[skiland]

no 1 yes no2 yes no 3 depends on which one they used at detector take of detector cover and look
no4 probably in detectors again take of cover and look for resistor connected

[nat]

Photo of the PIR terminals:



On the NX4 mainboard I have the:
Blue wire -> Zone terminal
White -> COM terminals next to the zone terminals
Red -> Keypad+
Black -> Keypad COM

[skiland]

so white is common at the board blue is to the zone cant see if the resistor is in detector if not connect a 3.3k in series with the zone wire can u send a bigger pic pls

[skiland]

sorry made bigger resistor already there so whites for zone1 and 2 in com white zone3 in com blue in zone3 resistor from com to zone 4 if u got new board they give you the resistors

[nat]

Let me repeat this back to be sure I've got it right:

PIR whites -> Zone COMs
PIR blues -> Zone 1,2,3
Bridge a resistor between the COM next to Zone 4 and the Zone 4 terminal?

[skiland]

yes

[watchdog]

xxxxxxxxxxxxxxxxxxx

[nat]

Powered up system and checked for any problems with system, expanders etc, no issues so far.

Loving this Touchnav touch screen, tons better than the old binary keypad!

Many thanks for your help skiland, and very quick too