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THIS ELECTRONIC DOCUMENT MAY HAVE BEEN SUPERCEDED.
THE MOST CURRENT DOCUMENT INFORMATION IS AVAILABLE
FROM YOUR BELL HELICOPTER TEXTRON REPRESENTATIVE.
PRODUCT DATA
JANUARY 2003
IIDS OPERATION FEATURES-DUAL POWER & PROCESSORS
The IIDS processes and displays information from the engines and systems separately
so that a single failure does not cause the complete loss of one parameter for both
e n g i n e s / s y s t e m s . T h e I I D S c o n t a i n s t w o p o w e r s u p p l i e s , t w o i n d e p e n d e n t
microprocessors and two independent displays.
Each power supply has two isolated 28 Volt DC inputs from two helicopter sources
so that the loss of one power source does not cause the loss of the alternate power
source or loss of power altogether. Two processors ensure the loss of one processor
does not cause the loss of any information shown on the display, except for fuel quantity,
where loss of one processor will cause the loss of its associated fuel sensor, and only
the fuel in one side of the fuel system will be displayed. In the event of a failure of one
of the displays, pressing the “C” switch under the primary display will cause the composite
screen to be shown.
IIDS OPERATION FEATURES-DUAL DATA INPUT
The IIDS receives data for most display parameters from dual sources. All operating
system data transmitted on the AIRINC 429 data bus is available to the IIDS, as well as
the corresponding analog input port data for each parameter [thermocouple signal,
monopole pulse signal, transducer signal, etc.]. Whenever the primary source of data
for a MGT, Q, NP, NR, or NG parameter is missing or invalid, the secondary source will
provide backup data for display. When data displayed is from a secondary source (except
NG), the word “ALT” will be displayed below the data. If both primary and secondary
sources are missing or invalid the digital display will revert to dashes, the vertical scale
will remain empty, and an amber “FAIL” (except NG) will appear below the scale.
DIGITAL DISPLAY
OF SCALE
INDICATION
TYPICAL DISPLAY FEATURES
TAPE CHANGES
COLORS WHEN
TIME LIMIT PWR
IS REACHED
START LIMIT
TOP[5 MIN]
MCP[CONT.]
ALT OR FAIL
MESSAGE
INDICATE DATA
SOURCE & LOSS
POINTER
[TRIANGLE]
FOLLOWS RISE
AND FALL OF
VERTICAL SCALE
LABEL
IDENTIFIES
DATA
VERTICAL SCALE
RISES AND FALLS;
CHANGES COLOR
GREEN/YELLOW/RED
FOR CONTINUOUS/
OPER. LIMIT/
MAX. LIMIT
Содержание BELL 430
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