MD41-24P28

REMOTE TRANSFER RELAY UNIT
The MD41-24P is a remote mounted transfer relay
unit specifically designed for switching a CDI or
HSI Indicator between two aircraft radio navigation
systems. The remote switching unit is designed
for use with GPS systems where the user desires to
share a common CDI or HSI between an existing
NAV system and a GPS system. The 24 pole unit
features 8 relays consisting of 3 poles per relay. Each
relay can be activated individually by either voltage
or ground keying or as a group by ground keying.
Other design features include complete interlocking
of all transfer relays utilizing one pole per relay for
failure monitoring. A special ILS override that will
automatically force the MD41024P to switch to
NAV mode when the NAV (VOR) receiver is tuned
to an ILS frequency. Also, an adjustable dimming
regulator is included to provide dimmed voltage
to an external annunciation (750 ma max). All
transfer relays have gold plated contacts and are
nitrogen filled for high reliability.

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