User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 4−15
15 Dec 2005
Table 4−1. TCAS 3000 Computer Unit Loading/Gradient Specifications (cont)
Connector Pin
Designation
Functional Description
RBP−5K Climb Inhibit Discrete Input No. 4 (NO)
See RMP−1J.
RBP−6A Airborne Data Loader Link A Discrete Input
This discrete input, along with Data Loader Discrete Inputs No. 2, 3, and 4 (pins RBP−6B,
RBP−6C, and RBP−6D, respectively), is a ground/open type discrete that specifies what
type of data loader (ARINC 603 or ARINC 615) is attached. The TCAS computer unit has
separate receiver busses and separate data loader enable discrete inputs to support
simultaneous connections to an ADL and PDL. A ground on pin RBP−6A indicates that
an airborne data loader is connected to the rear connector of the TCAS computer unit. A
ground on pin J1−18, PDL Link A Discrete Input, indicates that a portable data loader is
connected to the front connector of the TCAS computer unit. The data loader discrete
inputs at RBP−6B, RBP−6C, and RBP−6D are also connected to the data loader discrete
inputs on the front connector (pins J1−51, J1−52, and J1−53, respectively). Listed below
is an active discrete (selected) indicated by a ground and an inactive discrete (not
selected) indicated by an open.
J1−51/ J1−52/ J1−53/
RBP−6A J1−18 RBP−6B RBP−6C RBP−6D Function
Ground Open Ground Open Open ARINC 615 ADL
Ground Open Open Ground Open ARINC 603 ADL
Open Ground Ground Open Open ARINC 615 PDL
Open Ground Open Ground Open ARINC 603 PDL
− − − − − − − − Ground SW Part Number is output
RBP−6B Data Loader Discrete Input No. 2
See RBP−6A.
RBP−6C Data Loader Discrete Input No. 3
See RBP−6A.
RBP−6D Data Loader Discrete Input No. 4
See RBP−6A.
RBP−6E, 6F ARINC 429 CFDS Output: [RBP−6E (A), RBP−6F (B)]
This differential pair output is a low speed ARINC 429 bus (12.5K bits/second nominal),
that transmits data to an onboard maintenance computer or a central fault display system.
RBP−6G, 6H ARINC 429 CFDS Input: [RBP−6G (A), RBP−6H (B)]
This differential pair input is a low speed ARINC 429 bus (12.5K bits/second nominal),
that receives data from an onboard maintenance computer or a central fault display
system.
RBP−6J Single Mode S Program Pin
Ground this pin when the computer is connected to a single mode S transponder.
RBP−6K Single Radio Altimeter Program Pin
Ground this pin when the computer is connected to a single radio altimeter.