User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
Page 4−2
15 Dec 2005
Table 4−1. TCAS 3000 Computer Unit Loading/Gradient Specifications
Connector Pin
Designation
Functional Description
TCAS Computer Unit Right Middle Plug (RMP)
RMP−1A,
RMP−1B,
RMP−1C,
RMP−1D
Reserved Discrete Outputs
RMP−1E TA Display Enable Discrete Output (NO)
This output is a ground/open type discrete used by the weather radar display to place the
radar in standby mode. A ground on this pin enables the weather radar display.
RMP−1F Corrective Aural Advisory Discrete Output (NO)
This aural advisory discrete output is a ground/open type discrete used to control external
equipment that generate tones to accompany TCAS advisories. The output is active
whenever a corrective advisory (RA that requires a corrective maneuver) is issued. The
output remains active for the duration of the synthesized voice unless it is cancelled by
the cancel discrete at RMP−3D. Only one aural advisory is active at a time. The
corrective discrete and preventative discrete at RMP−1K are mutually exclusive. The
active state is ground and the inactive state is open. This pin is reserved on the −XX001
TCAS CU.
RMP−1G,
RMP−1H
Reserved
RMP−1J Climb Inhibit No. 1 Discrete Input (NO)
This input is a ground/open type discrete used to provide information to the TCAS CU
whether to assume the aircraft cannot achieve a climb rate of 1500 feet per minute
(FPM). The climb inhibit discrete inputs are designed in pairs (No. 1 and No. 2 at
RMP−13G, or No. 3 at RBP−5J and No. 4 at RBP−5K) but can be wired as a single input
or in conjunction with other aircraft operations to achieve airframe customization of the
climb inhibit feature. The 1500 FPM climb inhibit function is assumed whenever No. 1
and No. 2 are ground or No. 3 and No. 4 are ground.
RMP−1K Preventive Aural Advisory Discrete Output (NO)
Same as RMP−1F, except this discrete is active whenever a preventative advisory (RA
that directs the flight crew to avoid certain maneuvers or maintain flight path) is issued.
RMP−2A Traffic Aural Advisory Discrete Output (NO)
Same as RMP−1F, except this discrete is active during a traffic advisory when information
is being given to the flight crew regarding other aircraft in the immediate vicinity. No
suggested maneuver is issued. This output is inhibited if either the corrective or
preventative output is active.
RMP−2B,
RMP−2C
Reserved
RMP−2D Advisory/Announce Common
This is the return line for the aural and visual advisory discrete outputs.