Honeywell MK VI - Manual (Page 53)

Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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3.2.7 Audio Outp ut
The audio outputs consist of both an 8-ohm amplifier and a transformer isolated 600-ohm output. Audio output
messages are provided as specified in the selected Audio Menu (Category 5) when inputs are valid and the
audio inhibit discretes are not active.
When audio inhibit is enabled, the output discrete(s) associated with suppressed message(s) are active.
3.2.8 Discrete Ou tputs
The MK VI/MK VIII EGPWS provides for up to twelve 0.5 amp nominal (1 amp maximum) Ground/Open discrete
outputs. The discrete outputs are defined in Appendix E Section 4.2.11 and Category 13.
The discrete outputs are optional if the ARINC 429 output data is used for driving the alert/warning lamps via a
symbol generator. Most Aircraft Types do not use the ARINC 429 output data for lamp control. (This data is
typically sent to the Flight Data Recorder.)
All outputs to lamps are driven by solid state switches to ground. These outputs can also be used as discrete
drivers for other devices (e.g. terrain display switching). Output discretes are intended to operate with +28
VDC lamp sources and will not operate with +5 VDC lamp sources.
3.2.9 Configurati on Module
The EGPWS aircraft configuration is programmed into a configuration module installed in the aircraft wiring. This
Configuration Module is identified as Honeywell part number 700-1710-020. The configuration module is
installed as part of the P2 mating connector backshell and contains electrically reprogrammable memory for
configuration storage. By this method the aircraft configuration is stored in the configuration module on the
aircraft and each newly installed EGPWS computer does not require operator assisted programming before or
during installation. The aircraft configuration in the Configuration Module can be changed at any time by use of
the WinVIEWS software, as explained in Section 4.