I just realized that the power input for the control board is 16VAC, not 120VAC, so I can’t power the GoControl relay module from the panel like I thought I would be able to. There’s no other power source close to my panel and I’m not willing to run new wiring for an old alarm system. I think I’ll be better off replacing the whole system with a Vista 20P and Envisalink. If I only get one keypad instead of 3 I can do it for a little over $200, and have full control over arming/disarming, state monitoring (armed away vs armed stay), and individual zone monitoring. One other nice thing about upgrading is that my current FA110C panel only has 6 zones, so two of my entry doors are combined into one zone, and the third entry door is combined with some window sensors. Since the 20P has 8 zones, I can split each of these doors out into it’s own zone, and use those zone statuses to monitor door state instead of the Iris contact sensors I’m currently using.