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--5
Table 4--1. TT--950/951/952 T
2
CAS Computer Unit Interface Description (cont)
Connector Pin
Designation
Functional Description
RMP--5A Reserved for TAWS/RWS use.
RMP--5B Reserved for TAWS/RWS use.
RMP--5C Reserved for TAWS/RWS use.
RMP--5D Reserved for TAWS/RWS use.
RMP--5E ADS--B Program Input (Intruder File Enable).
RMP--5F ADS--B Program Input (GP Bus Enable).
RMP--5G ADS--B Program Input (Reserved)
RMP--5H Reserved for TAWS/RWS use.
RMP--5J Reserved for TAWS/RWS use.
RMP--5K Air Ground Discrete Input (NO): (Weight--On--Wheels)
This ground/open type discrete input (Note 1) to the T
2
CAS computer unit indicates the
status of the Air/Ground or Weight--On--Wheels (WOW) switch. TCAS filters this input to
make sure it remains in a steady state a minimum of 4 seconds before an Air/Ground
transition is recorded. An open indicates the aircraft is airborne and a ground indicates
the aircraft is on the ground.
Inputs should be diode isolated from each other.
RMP--6A, 6B ARINC 429 Performance Limit Input: [RMP--6A (A), RMP--6B (B)]
This Low Speed ARINC 429 (12.5 Kbits/s) input is provided for future applications to
receive climb rate performance limit information from an external device such as a Flight
Management Computer.
RMP--6C Reserved for TAWS/RWS use.
RMP--6D Performance Limit Discrete Input (NO)
This input provides the T
2
CAS computer unit with an input from the Flight Management
Computer (or equivalent) which indicates when the aircraft cannot achieve a 1500 FPM
climb rate. When this input is ground, the climb rate is not limited and no action is
needed by the T
2
CAS computer unit. When this input is open, the climb rate is limited
when the aircraft is above the value set by the altitude limit program pins (RMP--6E thru
RMP--6J).