CTI Products AIB AstroTAC Interface - Manual (Page 8)

AIB Hardware Reference Theory of Operation
CTI Products, Inc.
68-10842-115
3
The AIB updates the ASTRO-TAC™ Comparator with the latest control
information every second and whenever a FORCE VOTE or DISABLE command
is received from a User Interface Module.
2.3 Loss of Communications
In the unlikely event that the MCN network link between the AIB and all of its
User Interface Modules is broken (the AIB is no longer communicating with any
User Interface Module, therefore its ACT LED will turn off), the AIB will send a
message to the ASTRO-TAC™ Comparator clearing any active FORCE VOTES.
Active DISABLE inputs from the User Interface Module(s) are not changed if
MCN network communications is lost.