Can I trigger five outputs directly or through an external relay?

Methods for Triggering Multiple Outputs with Alarm Panel and Alarm Panel Pro

Yes. Both models can trigger 12V outputs and/or 3.3V outputs. If you need dry contact outputs or higher voltage outputs, you can power and trigger a 5V relay with the 3.3V outputs. The Alarm Panel (6-zone alarm board) can support up to one 12V output and five 3.3V outputs. The Alarm Panel (6-zone addon) can support up to six 3.3V outputs
The Alarm Panel Pro can support up to two 12V outputs and ten 3.3V outputs.