User's Manual

Table Of Contents
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Table 4-2: T
3
CAS Computer Unit Interface Description
(Applicable to Part No. 9005000-11801 and -55801)
Connector
Pin
Designation
Functional Description
RMP-5H
Reserved: No Connection
RMP-5J
Reserved: No Connection
RMP-5K
Air Ground Discrete Input (NO): (Weight-On-Wheels)
This ground/open-type discrete input (Note 1) to the T
3
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 sec 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 FMC GENBUS #1 (NAV Modes) Input: [RMP-6A (A), RMP-6B (B)]
This Low-Speed ARINC 429 (12.5k bits/s) input provides aircraft gross weight,
selected altitude, position, etc. to T
3
CAS.
RMP-6C
Reserved: No Connection
RMP-6D
Performance Limit Discrete Input (NO)
This input provides the T
3
CAS computer unit with an input from the Flight
Management Computer (or equivalent) which indicates when the aircraft cannot
achieve a 1500 FPM (457.2 m/min) climb rate. When this input is ground, the climb
rate is not limited and no action is needed by the T
3
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).
RMP-6E
2000 ft (609.6 m) Altitude Limit Program Pin (NO)
This pin, along with pins RMP-6F thru RMP-6J, select the “can’t climb” altitude in
2,000-ft (609.6-m) increments up to 62,000 ft (18897.6 m). This is the altitude the
aircraft is not able to achieve a 0.25-g vertical acceleration to a 1500-FPM (457.2-
m) climb rate for an altitude gain of 750 ft (28.6 m) above a certain altitude under all
circumstances. The “can’t climb” altitude is selected by connecting jumper wires
from altitude limit program pins to the program common pin (RMP-6K).
RMP-6F
4000 ft (1219.2 m) Altitude Limit Program Pin (NO)
See RMP-6E.
RMP-6G
8000 ft (2438.4 m) Altitude Limit Program Pin (NO)
See RMP-6E.
RMP-6H
16000 ft (4876.8 m) Altitude Limit Program Pin (NO)
See RMP-6E.
RMP-6J
32000 ft (9753.6 m) Altitude Limit Program Pin (NO)
See RMP-6E.
RMP-6K
Program Common
See RMP-6E.
Pub. No. 8600200-001, Revision 004
34-45-29
4-49
04 Nov 2014
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.