Section 1.0 Introduction; Scope; Equipment Description; General Specifications - Trans-Cal SSD120-N-RS5 Owners & Installation Manual

Section 1.0 Introduction

1.1 Scope

1.2 Equipment Description

1.3 General Specifications

1
SSD120-(XX)NE-RS5 Extended operating temperature range: -55° to +70°C. Operate low temperature (-55 C) at +28Vdc.
2
Longer warm-up times will be experienced when operated at +12 Vdc.
This manual provides detailed installation, calibration and operating instructions for Trans-
Cal Industries' Model SSD120-(XX)N-RS5 and SSD120-(XX)NE-RS5
encoder/digitizer.
Approved under FAA TSO-C88a and EASA ETSO-C88a the Model SSD120-(XX)N-RS5
and SSD120-(XX)NE-RS5 is an all solid-state electronic device which, when connected to
an aircraft's static and 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 U.S. National Standards for
Common System Component Characteristics for the I.F.F. Mark X (SIF)/Air Traffic Control
Radar Beacon System SIF/ATCRBS.
The serial altitude data is provided on (5) five asynchronous RS232 outputs which are
divided into two groups. Group A consists of TxD1, TxD2 and TxD3. Group B consists of
TxD4 and TxD5. The serial data protocol is selectable for each output group and may be
used to provide pressure altitude data to transponders, GPS or other on board navigation
devices. Refer to Table IX, Table X and §4.6 & §4.7.
This equipment has been tested and will utilize power in accordance with MIL-STD-704E
for 28 Vdc systems.
Operating Voltage:
Model SSD120-(XX)N-RS5
Model SSD120-(XX)NE-RS5
Operating Current all models:
Operating Temperature:
Model SSD120-(XX)N-RS5
Model SSD120-(XX)NE-RS5
Storage Temperature (non-operating)
all models:
Warm-up time:
Weight:

1.3.1 Operating Altitude

Model
SSD120-30N( )-RS5
SSD120-35N( )-RS5
SSD120-42N( )-RS5
+12 to 30 Vdc
2
+12 to 30 Vdc
0.26Amps at 14Vdc
0.28 Amps at 28Vdc
-20° to +70°C (-4° to +158°F)
-55° to +70°C (-67° to +158°F)
-65° to +85°C (-85° to +185°F)
0 Seconds at +20°C (+68°F) and higher. See
Figure 2 for low temp warm-up times.
5.1 oz. (6 oz. with tray)
Operating Altitude
-1000 to +30,000 feet.
-1000 to +35,000 feet.
-1000 to +42,000 feet.
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series of altitude