Specifications

Alto 818 Installation and Operation
3-20 P/N 66109074001 Rev. D
3.11 MONITORED INPUTS
Monitored inputs are any contacts connected to the ACU through an MSM. Each monitored
contact has a designator in the form X.Y, where X is the sensor port of the MSM (18) and Y is
the contact pair number (14). Monitor points used for door switches and REX switches are
selected with the DOOR command. The MONITOR command may be used to enter a name for
each point and to indicate a report number to be initiated when the monitor point is active.
When both a REX and door switch are to be used on a door, the REX switch must have a lower
designator number than the door switch. For an MSM connected to sensor port 2, the REX switch
might be contact pair 1, monitor point 2.1, and the door switch contact pair three, monitor point
2.3.