Ademco Alarm Wiring Diagram. Ademco 4120 and 4140 xmp. Web summary of contents for ademco 997. Ademco Wiring Ademco Vista 20p from ademcoiginka.blogspot.com Security system, keypad user manuals, operating guides & specifications To stop the alarm sounding, simply disarm the system. This system uses a range of reserved addresses for each type of device.