User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Table 4-1: T
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CAS Computer Unit Interface Description (cont)
(Applicable to Part No. 9005000-10000, -10101, -10202, -10204, and -11203)
Connector
Pin
Designation
Functional Description
RTP-14F
Discrete Input (Gnd/Open), Latch
Standby/ON
RTP-14G
Discrete Input (Gnd/Open)
XPDR Mode S Address Bit A23
RTP-14H
Discrete Input (Gnd/Open)
XPDR Mode S Address Bit A24
RTP-14J
Ground Discrete Output
Spare
RTP-14K
Discrete Output 500 mA
XPDR Fail #2
RTP-15A
Discrete Output 5 V dc / 100 mA
XPDR Fail #1
RTP-15B,
15C
ARINC 429 TCAS Output
This bus outputs Dataloader or ADLP COMM A data.
RTP-15D
APM Power
+12 V dc power source for the Airplane Personality Module. Connect to APM J1-7.
RTP-15E
APM Return
This is the Ground return for +12 V dc APM power source. Connect to APM J1-8.
See pin RTP-15D
RTP-15F
APM Clock
This is the APM Clock Output which is used to synchronize serial output to the
APM. The Clock output frequency is 2.0 MHz + 1% when the APM is being
accessed and is set to a logic 0 (not toggling) when the APM is not being
accessed. Connect to APM J1-2.
RTP-15G
APM Serial Data Output
This is the Serial Data Output from T
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CAS to the APM Serial Data Input. APM
Enable (RTP-15J) and APM Write Enable (RTP-15K) must be enabled before data
can be written to the APM. Connect to APM J1-1.
RTP-15H
APM Serial Data Input
This is the Serial Data Input to T
3
CAS from the APM Serial Data Output. APM
Enable (RTP-15J) must be enabled before data can be read from the APM.
Connect to APM J1-9.
RTP-15J
APM Enable No.1
This pin is used to Enable Read/Write access to the APM. An APM Enable Output
logic of 1 disables Read/Write access to the APM and a logic 0 enables APM
Read/Write access. Connect to APM J1-3. This pin is used in conjunction with pins
RTP-15G (APM serial output) and RTP-15H (APM serial input).
4-10
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
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