User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
344323
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Page 141
15 Dec 2005
Table 110. Pressure Transducer Module Leading Particulars
Item Specification
Dimensions (maximum):
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 in. (40.6 mm)
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8 in. (71.1 mm)
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 in. (190.5 mm)
Weight (maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 lb (0.091 kg)
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±12 V DC derived from VSI/TRA ±15 V
power supply
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 Watts nominal
Mating Connectors:
J1 (Electrical Connector) . . . . . . . . . . . . . . . . . . . . . . . 15 Pin Round, M83723/75A1415N
(Pneumatic Fitting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flareless nipple, NAS 176006
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A mounting bracket is available for use
in a limited access area or an ARINC
408A 3ATI round plate is available for
mounting in the instrument panel
The PTM contains a pressure sensor packaged in a TO8 header case and measures by
a strain gage mechanism. The pressure sensor converts pressure that range from 3.0 to
33.0 inHg into a differential output voltage. Contained within the sensor are the strain
sensing element, sensor heater, and temperature sensing diode.
The PTM meets the specifications that follow after the altitude rate has been calculated
from the static pressure source:
The input pressure range is from 3.0 to 33.0 inHg, which covers the altitude range of
2,000 to +50,000 feet
The applied altitude rate ranges from 0 to ±6000 ft/min
The PTM is capable of detecting and input pressure variation of 25 ft/min
The PTM is capable of tracking input signals of 40 ft/sec without performance
degradation.
The PTM is designed to send a power down message to the VSI/TRA. This is the only
BITE capability of this unit.