CMUip-2212 Cabinet Monitor Unit
Operations Manual
Eberle Design Inc.
Page 4
1.9 FAILED STATE ACTION (LFSA, LFSA-R, NFSA)
When triggered by the detection of a fault condition that exists longer than the minimum
defined period, the CMUip-2212 will enter the Failed State Action (fault) mode causing the
OUTPUT relay to de-energize and the contacts on the OUTPUT NO pins to open. The
cabinet assembly should be wired such that the opening of the OUTPUT NO relay contacts
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
CMUip-2212 from a LATCHED FAILED STATE ACTION (LFSA). Only a Unit Reset from
the Reset Button or EXTERNAL RESET TEST input or a CMUip-2212 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.
1.9.1 EXIT FROM FSA
Prior to the CMUip-2212 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 CMUip-2212 will set the Start-Up
Flash Call bit in the Type 209 (195) Frame to 1
.
At all other times the Start-Up Flash Call bit
of the Type 209 (195) 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.
