User's Manual
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 4−34
15 Dec 2005
Table 4−5. 41−Pin VSI/TRA Interface Descriptions (cont)
Connector Pin
Designation
Functional Description
J1−34 CONFIGURATION STRAP #2 INPUT (NO):
For −84X and −88X units, this pin programs the VSI/TRA to use the remote light sensor
input at pins 24 and 25. If CS2 is open, a Boeing Airplane Company remote light sensor
type (−10 to +10 V) is expected at pins 24 and 25. If grounded a Douglas Aircraft
Company remote light sensor type (0 to 18 V) is programmed. Also see pin 25.
For −89X units, CS2 is used to program the VSI display for English or Metric. If pin
J1−34 is open, information is displayed in English. If grounded, the information is
displayed in Metric.
For −86X units, CS2 is used with CS3 (pin 17) to program the Lighting Curve. The
following applies: O = Open, G = Ground
CS2 CS3
Pin 34 17 Definition
O O Boeing (Normal Configuration)
G O McDonnell Douglas
O G Invalid (Displays VSI/TRA Red X fault if wired)
G G Invalid (Displays VSI/TRA Red X fault if wired)
J1−35 CONFIGURATION STRAP #4 INPUT (NO):
For −86X, −88X, and −89X units, CS4 is paired with CS5 (pin 36) to program the
VSI/TRA to display VSI only, VSI/RA or VSI/RA/TA.
The following applies: O = Open, G = Ground
CS4 CS5
Pin 35 36 Definition
O O VSI/RA/TA
G O VSI/RA
O G VSI Only
G G Invalid
For −84X units, CS4 is paired with CS3 (pin 17) to program the Display Range Format.
The following applies: O = Open, G = Ground
CS4 CS3
Pin 35 17 Definition
O O 14 Nautical Mile Range
G O 6 Nautical Mile Range
O G 40 nautical Mile Range
G G 6 Nautical Mile Range