digicom test fault optima plus2 / rpi

[ultrahaggis]

Hi,
I'm wiring the digicom outputs from my Optima plus 2 to an raspberry pi to trigger an email / alert if intruder/fire/PA outputs are triggered.

I've taken pins 43,44,45 to a board of opto isolators to convert 12v down to 3.3v for the GPIO pins together with the 12v rail as a common anode so that when in an alarm condition the 12v drops to 0v I can detect and trigger a script.

Running the engineer test though from the panel, triggering the PA or Intruder digicom test the display should show '6' or '7' but doesn't - just get 2 beeps. I've left 42 line fault monitor unconnected. meter shows 12v is present on 43,44,45 as it should be.

Is there some other trick to enable the digicom out? I can't see anything else in the service manual -

thanks!!


edit - here's the optoisolator board http://www.icstation.com/4bit-optocoupler-isolator-level-voltage-converter-board-signal-p-8036.html

 

[secureiam]

When you test do you see the digi switch?

 

[ultrahaggis]

no - there's no sign of the 12v dropping to 0 and the display remains 't' instead of changing to '6' - just 2 beeps low-high