CMU-212 Cabinet Monitor Unit
Operations Manual
Eberle Design Inc.
Page 4
will cause an automatic switching of the field signal outputs from normal operation to
flashing operation.
Only Unit Reset from the Reset Button or EXTERNAL RESET TEST input will reset the
CMU-212 from a LATCHED FAILED STATE ACTION (LFSA). Only a Unit Reset from the
Reset Button or EXTERNAL RESET TEST input or a CMU-212 Power Fail will reset a
LATCHED RESETTABLE FAILED STATE ACTION (LFSA-R).
A NONLATCHED FAILED STATE ACTION (NFSA) will be reset if the fault conditions
causing the NFSA have been removed. An NFSA will last for the programmed Minimum
Flash time at a minimum.
Only one LFSA, LFSA-R or NFSA fault state will be set at any time.
1.8.1 EXIT FROM FSA
Prior to the CMU-212 transferring the OUTPUT NO contacts from the FSA state to the No
Fault state, a transition
period of 500 milliseconds will occur. During the transition period
the OUTPUT NO contacts will be in the FSA state and the CMU-212 will set the Start-Up
Flash Call bit in the Type 189 Frame to 1
.
At all other times the Start-Up Flash Call bit of
the Type 189 Frame will be set to 0. This provides an early indication to the ATC that exit
from the FSA state is occurring and the start-up phases should be set.
