RT-2087/ZPX-A User and Installation Guide
UAV-1005667-001 Rev A
ECCN 7A994
Page 26 | 48
7.9 Cooling Requirements
ZPX-A is designed to meet all applicable performance requirements without
forced-air cooling.
Attention should be given, however, to the incorporation of cooling
provisions to limit the maximum operating temperature if ZPX-A is installed
in close proximity to other avionics which would otherwise cause
operational temperature limits to be exceeded [see §5.7 (Environmental
Qualification Form)]. The reliability of equipment operating in close
proximity in an avionics bay can be degraded in the absence of adequate
cooling.
8 Control and Configuration Interface
ZPX-A has a control and configuration serial interface. It is used to
configure the equipment at installation time and to control the device while
operating. Typically, a control head or unmanned aircraft flight control
computer is connected to the device during operation.
Transponder control provides the ZPX-A with data such as operating mode,
emergency status, squawk code, and IDENT. Optionally it provides
external pressure altitude. Status and annunciation information is provided
by ZPX-A over the control interface.
For 14 CFR 91.225 compliance with no operational limitations, dynamic (in-
flight) control is necessary.
For details on the ZPX-A control interface, refer to Appendix A.
For typical installations, refer to Appendix C.
9 Position Interface
For 14 CFR 91.225 (i.e., ADS-B) compliance, a serial connection to an
appropriate position source is required. For additional details reference
§5.10 and §7.4.
ZPX-A receives compliant position information from a GPS or similar
position source. Only one position source can be configured to ZPX-A at a
time. If multiple position sources are detected, ZPX-A will indicate a
