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MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
Table 15. TPA-100A TCAS Processor Inputs and Outputs
(cont)
Source Or
Destination
Processor I/O Signal
Name and Type
General
Description
RA AND TA DISPLAY RELATED I/O (cont)
RA/VSI No. 2 (RA/VSI that
accepts low-speed 429
input data) (cont)
Display Status No. 2 Discrete
RA/VSI No. 2 failure status output to
TCAS processor.
Five Strapped Pins on
Processor Rear Connector
Intruder Display Limit Straps.
Five Discrete Inputs
Show the maximum number of
intruder aircraft (0-30) to be shown on
the traffic displays.
One Strapped Pin on
Processor Rear Connector
Ground Display Mode Strap
Discrete
Controls if traffic is shown when own
aircraft is on-the-ground. If strapped
to not show traffic on-the-ground,
TCAS goes to STANDBY on-the-
ground.
One Strapped Pin on
Processor Rear Connector
RA/TA Display Mode Strap
Discrete
Shows either all traffic or TA/RA and
near traffic only (for example,
nonthreat traffic not shown).
Optional Ground Proximity
System
Ground Proximity (GPWS)
Advisory Delay Discrete
Puts TCAS into the TA only mode
(sensitivity level 2) and prevents all
audio and aural advisories.
Optional Wind Shear
System No. 1 and No. 2
Wind Shear Advisory Delay No. 1
and No. 2 Discretes
Puts TCAS into the standby mode
(sensitivity level 1) until wind shear
condition is over.
Optional Advisory Alert
Cancel Switch
Advisory Alert Cancel Discrete
When pushed and released, this
switch cancels active advisory alert
conditions.
Cockpit Speaker and
Optional Cockpit
Headphones
Audio HI and LO outputs.
Speaker output - 8 ohms, 8 watts
maximum. Headphone output -
600 ohms, 80 milliwatts
maximum. (Adjustable using
audio level program straps, below.
See Figure 2005, Note 15 in
MAINTENANCE PRACTICES
section for adjustment ranges.)
Supplies the voice advisory message
alerts to cockpit speaker and optional
headset.
