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Trans-Cal SSD120-(XX)A RS232 Solid State
Encoder with RS-232 Port
by Trans-Cal Industries, Inc.




SSD120-(XX)A RS-232 General Description:

Approved under FAA TSO-C88a, the Model SSD 120-(XX)A-RS232 and SSD 120-(XX)AE-RS232 is an all solid-state electronic device which, when connected to an aircraft static electrical system, converts pressure altitude information into parallel and serial digital data.

The parallel digital altitude data protocol is set forth in the ICAO International Standard for SSR Pressure Altitude Transmission. In accordance with US National Standards for Common System Component Characteristics for the IFF Mark X (SIF)/Air traffic Control Radar Beacon System SIF/ATCRBS.

The serial altitude data is provided on (2) two asynchronous RS232 output ports. The serial data protocol is individually selectable for each port and may be used to provide pressure altitude data to GPS or other on board navigation devices

SSD 120-(XX)A(E)-RS232
SSD 120-30A-RS232....................-1,000 feet to 30,000 feet.
SSD 120-35A-RS232....................-1,000 feet to 35,000 feet.
SSD 120-42A-RS232....................-1,000 feet to 42,000 feet.
Note: The SSD 120-(XX)A-RS232 series is adjustable for 10 and 100 foot resolution.
Note: For the "E" model (Extended Temperature Range: -55 to +70C vs. -20 to +70C) add $200 USD to dealer cost per unit.

Other Specifications:
Operating Current...................0.54 Amps at 14Vdc & 0.60 Amps at 28Vdc.
Storage Temperature..............-65 to +85C
Weight..................................10 oz
Accuracy...............................Digitizer Accuracy is +/- 50 ft from -1,000 ft to FL300, +/- 75 ft from 30,100 ft. to FL420.




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