User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Table 4-1: T
3
CAS Computer Unit Interface Description (cont)
(Applicable to Part No. 9005000-10000, -10101, -10202, -10204, and -11203)
Connector
Pin
Designation
Functional Description
RTP-15K
APM Write Enable No.1
This pin is used to Enable Write access to the APM. An APM Write Enable Output
logic of 1 disables Write access to the APM and a logic 0 enables APM Write
access. Connect to APM J1-4. This pin is used in conjunction with pin RTP-15G
(APM serial output).
T
3
CAS Computer Unit Right Middle Plug (RMP)
RMP-1A,
to
RMP-1D
Reserved Discrete Outputs (Standard Ground/Open)
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 (Note 3) 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.
RMP-1G
Reserved Discrete Output (Lamp Driver)
RMP-1H
Reserved Discrete Output (Lamp Driver)
RMP-1J
Climb Inhibit No.1 Discrete Input (NO)
This input is a ground/open-type discrete used to provide information to the T
3
CAS
CU whether to assume the aircraft cannot achieve a climb rate of 1500 FPM (457.2
m/min). 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 (457.2 m/min) climb
inhibit function is assumed whenever No.1 and No.2 are ground or No.3 and No.4
are ground.
See Note 1 for Ground/Open type discrete input definition.
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.
Pub. No. 8600200-001, Revision 004
34-45-29
4-11
04 Nov 2014
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.