Trouble connecting to AlarmRelay


Active Member
The one on the left. It will have a version number like 3.0 and a date like 2009. If you are interested in one, post a picture. By the way, the chips with labels are eproms. They have a window under the label that allows them to be erased with UV light. eeproms do not have the window and are erased electronically.


Thinking the very old boards had two. The one you upgraded was the left one as you look at the board. My first OmniPro 2 panel had two and I only changed the chip on the left.

Have a read here from 2014 - first slot is U29.

Need help, which eeprom upgrade