CMU-212 Cabinet Monitor Unit
Operations Manual
Eberle Design Inc.
Page 18
Section 4
FRONT PANEL DESCRIPTION
4.1 INDICATORS
4.1.1 POWER INDICATOR
A green POWER indicator will illuminate to indicate AC+ RAW voltage is proper. It will flash
at a 2 Hz rate when the AC+ RAW input of the CMU or AMUs are less than the AC Line
Dropout. It will remain Off when the AC+ RAW voltage is less than 70 +/- 2 Vrms. See
section 2.12.
4.1.2 24VDC FAIL INDICATOR
A red 24VDC FAIL indicator will illuminate when the CMU-212 is in FSA as a result of a
24VDC cabinet power supply fault.
The 24VDC FAIL indicator will pulse at a 2 Hz rate when the 24VDC monitor function is
disabled. Both the 24VDC FAIL and 12VDC FAIL will pulse when either the POWERDOWN
or NRESET input is False (low). See section 2.12.2.
4.1.3 12VDC FAIL INDICATOR
A red 12VDC FAIL indicator will illuminate when the CMU-212 is in FSA as a result of a
12VDC cabinet power supply fault.
The 12VDC FAIL indicator will pulse at a 2 Hz rate when the 12VDC monitor function is
disabled. See section 2.1 and 2.12.2.
4.1.4 CONFLICT INDICATOR
A red CONFLICT indicator will illuminate when the CMU-212 is in FSA as a result of a
Conflicting Channels fault. See section 2.2.
4.1.5 LACK OF SIGNAL INDICATOR
A red LACK OF SIGNAL indicator will illuminate when the CMU-212 is in FSA as a result of
a Lack of Signal Inputs fault. See section 2.5.
4.1.6 MULTIPLE INDICATOR
A red MULTIPLE indicator will illuminate when the CMU-212 is in FSA as a result of a
Multiple Inputs fault. See section 2.6.
4.1.7 CU / LOCAL FLASH INDICATOR
A red CU / LOCAL FLASH indicator will illuminate when the CMU-212 is in FSA as a result
of a Type 62 command from the ATC (see section 2.4), the LOCAL FLASH STATUS input
is inactive (see section 2.9), or CB TRIP STATUS is inactive (see section 2.10).
4.1.8 CLEARANCE INDICATOR
A red CLEARANCE indicator will illuminate when the CMU-212 is in FSA as a result of a
Yellow Clearance or Yellow Plus Red Clearance fault. See section 2.7 and 2.8.
4.1.9 FIELD CHECK INDICATOR
A red FIELD CHECK indicator will illuminate when the CMU-212 is in FSA as a result of a
Field Check Mode fault. The indicator will flash at a 2Hz rate when the CMU-212 is in FSA
with Field Check Status as a result of Conflict, Lack of Signal, or Multiple fault. See section
