BendixKing CAS 66A - Manual (Page 32)

PS 550 TRANSPONDER/ TCAS CONTROL UNIT
PS 550 Single or Dual Mode S/TCAS Control Unit (Dual Unit shown)
PS 550 CONTROLS AND DISPLAYS
The PS 550 Control Unit is the master control for both the TCAS sys-
tem and transponder. The PS 550 will also display the selected 4096
ATC code and current mode of operation in the display window.
Versions are available to control one or two transponders. A “Fail”
annunciation indicates failure of the selected transponder, antenna or
control data.
Note: If the PS 550 is interfaced to a MST 67A Mode S transponder and
the MST 67A senses a failure, a failure annunciation will be shown. A
maintenance check should be performed.
The Display Window displays the ATC
code selection, whether transponder #1
or #2 is active, transponder mode,
transponder ident, own aircraft flight level
(in TEST), TCAS mode, TCAS range and
TCAS above, below or normal vertical
display limit selected.
All display annunciations are seen during the control unit self-test.
Controls and Displays
28 Effective Date 6/04 006-08746-0000 Rev 6
TCAS I Pilots Guide 2/8/06 3:52 PM Page 28