User's Manual Part 2

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
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4--19
Table 4--1. TT--950/951/952 T
2
CAS Computer Unit Interface Description (cont)
Connector Pin
Designation
Functional Description
RBP--8E Self--Test Test Inhibit Program Pin (NO)
This program pin determines if self--test will be inhibited while airborne. If grounded, this
pin inhibits self--test while airborne. If open, self--test is enabled while airborne.
RBP--8F TA/RA Display Symbol Maximum 16 Program Pin (NO)
The T
2
CAS computer unit establishes the number of intruder symbols to be displayed on
the TA display through the program pins RBP--8F, --8G, --8H, --8J, and --8K. This number
can vary between 0 and 31, depending on the programming that is a summation of the
selected pins (--8F = 16, --8G = 8, --8H = 4, --8J = 2 and --8K = 1). Connecting one of
these pins to program common (RBP--7K) indicates the associated pin is not selected
and that its value is not included in the summation. Leaving the pin open designates the
associated pin is selected and its value is included in the summation. The encoded
number is placed within the R TS data word (label 357) and sent to the display. The
display should then limit the intruder symbols to this number.
RBP--8G TA/RA Display Symbol Maximum 8 Program Pin (NO)
See RBP--8F.
RBP--8H TA/RA Display Symbol Maximum 4 Program Pin (NO)
See RBP--8F.
RBP--8J TA/RA Display Symbol Maximum 2 Program Pin (NO)
See RBP--8F.
RBP--8K TA/RA Display Symbol Maximum 1 Program Pin (NO)
See RBP--8F.
RBP--9A
Thru
RBP--9J
Reserved Factory Test Pins
Leave these pins unconnected for aircraft installations.
RBP--9K Spare Pin
RBP--10A
Thru
RBP--10G
Reserved Factory Test Pins
Leave these pins unconnected for aircraft installations.
RBP--10H
Thru
RBP--10J
Spare Pins
RBP--10K Reserved Factory Test Pin
Leave this pin unconnected for aircraft installations.