Honeywell BENDIX/KING KLN 90B, Installation Manual, Page: 35 / 152

BENDIX/KING KLN 90B
Rev 5, April/2003 10521I05.TDC Page 2-7
U. Pin 34; Data Loader Out
Pin 34 outputs Data Loader information in RS 232 format. It can be used to in-
terface with a laptop IBM compatible PC to load the database.
V. Pin 35; Data Loader In
Pin 35 inputs Data Loader information in RS 232 format. It can be used to inter-
face with a laptop IBM compatible PC to load the database.
W. Pin 36; RS 232 In
Pin 36 is the RS 232 input. If there is not an RS 232 input, i.e. a Fuel Manage-
ment or Air Data sensor connected to the KLN 90B, Pin 36 (RS 232 In) should
be connected to Pin 13 (RS 232 Out) to eliminate unnecessary "NO RS-232 DA-
TA" messages. For more information refer to KLN 90B Pilots Guide, P/N 006-
08773-0000. Pin 36 may be connected to pin 13 even though Pin 13 is also used
to drive another load. For specific label information, refer to
Appendix A .
X. Pin 38; ALT ALERT
Pin 38 is the Altitude Alert input/output pin. Configuration is determined by a
sampling at powerup. If pin 38 is grounded, it is configured as an input. All pilot
selectable altitude alert functions of the KLN 90B will be disabled. This option
should be considered if another altitude preselector is already installed in the air-
craft. If pin 38 is open or connected to drive an alerting device, it is configured
as an output. Altitude alert functions will be selectable through the KLN 90B front
panel controls.
Y. Pin 39; ALT ALERT AUDIO
Pin 39 is the Altitude Alert Audio output which is active whenever ALT ALERT is
active.
Z. Pin 40; A/C Power
Pin 40 is the DC aircraft power input. The KLN 90B will accept from 11 VDC to
33 VDC input power.
AA. Pins 41 thru 50; Gray Code Inputs
Pins 41 through 50 are gray code altitude inputs from an encoding altimeter. If
the KLN 90B is paralleled with another unit such as a transponder, it may be
necessary to install isolation
diodes between one or both units and the encoder.
KLN 90/90B with serial numbers 1542 and above have diodes already installed
internally. Units with serial numbers below 1542 will only need the diodes in the
aircraft harness if it is interfaced to an encoder and another unit.