Rev C, March 8, 2018
6
Manual Number 9019049
Qualifications:
Model TC2000
Certification: FAA
TSO-C71
Environmental Qualification:
RTCA DO-160G Environmental Category; See
Section 5.2
Altitude: 35,000
feet
Temperature:
-55°C to +70°C (-67°F to + 158°F)
Table 1.3
2.1 COOLING
No external cooling is required. The unit is equipped with two internal DC fans that are
thermostatically controlled. The fans normally run at a slow speed, but depending upon load and
ambient temperature one or both fans may operate at a higher speed.
Restriction to airflow can cause overheating of the unit and limit performance or reduce the
expected life of the product. Make sure to provide adequate clearance on both ends of the unit
with the hexagonal openings to allow for proper circulation. In general, four to six inches of
clearance on both ends of the unit should be acceptable. Mounting the unit to a metal surface
can also help reduce the effects of temperature within the unit but is not required.
2.2 EQUIPMENT
LOCATION
The TC2000 Series is designed for mounting flexibility, allowing for installation inside or outside
the pressure vessel with no requirement for temperature control within the temperature
specifications. The unit is also designed to withstand high levels of condensing humidity.
However, installation locations where the unit could be subject to standing or direct water
exposure should be avoided. The unit can be mounted in any orientation. Clearance should be
provided for the mating connector and may require as much as five inches past the unit
connector to allow for back shell access to the connector.
2.3 ROUTING
OF
CABLES
The wires and cable bundle associated with the unit are heavy gauge wire and carry significant
power. Be aware of routing cables near other electronics or with other wire bundles that may be
susceptible to high energy flow.
Avoid sharp bends in cabling and routing near aircraft control cables. Also avoid proximity and
contact with aircraft structures, avionics equipment, or other obstructions that could chafe wires
during flight and cause undesirable effects.
2.4 LIMITATIONS
The TC2000 contains an internal DC-to-DC conversion function to produce the rated output as
specified. This function meets the requirements of FAA TSO-C71. The TC2000 also creates an
initial translation of an alternating current (AC) input to the intermediate DC voltage, which then
gets converted to the rated output. This initial translation of AC-to-DC power is considered a
non-TSO function. This is due to the lack of an available AC-to-DC Technical Standard Order.
However, the AC-to-DC function is fully tested and verified per the equipment requirements and
design as well as the stated environmental requirements. The data to support the non-TSO
