Main Connector - Jkt73-1 - Honeywell BENDIX KING KT 73 Installation Manual

Preliminary - Subject To Change Without Notice
BENDIX/KING

Main Connector - JKT73-1

Pin 1; AIRCRAFT GROUND
This pin provides an internal connection to chassis and may be used as the third wire
for RS-232 busses.
Pin 2; +14 V DC LIGHTING
+14 VDC lighting (320mA ± 32 mA) Open for +28 V DC lighting.
Pin 3; +28 V DC LIGHTING
+28 VDC lighting (160mA ± 16 mA). Ground for +14 V DC lighting.
Pin 4; ARINC SUPPRESSION I/O
As an input, a voltage ≥ 18 V and ≤ 70 V will cause suppression. A steady state voltage
≥ 18 V will cease suppression. As an output, this pin will go ≥ 18 V when the
transponder transmits. This pin conforms to ARINC 718A Attachment 6.
Pin 5; EXTERNAL AIR/GROUND
GND (<10 ohms) on this pin will inhibit ATCRBS replies and replies to Mode S All Call
messages.
Pin 6; TIS 429 TX B
This line is half of a standard differential ARINC 429 output used to broadcast traffic
information services to a display.
Pin 7; RS232 ALT RX
This line is programmable as the receive line of an RS-232 port used to report altitude.
Pin 8; GILLHAM ALTITUDE D4/RS232 ALT TX
This line is programmable as a Gillham altitude input or as the transmit line of an
RS-232 port used to report altitude. As a Gillham input, HIGH = voltage > 18.5 VDC
or resistance-to-ground > 100KΩ. Per ARINC 572, Attachment 4, input is an active
LOW pulse where LOW = voltage < 2.0 volts or resistance-to-ground < 15 KΩ.
Pin 9; 9 V SUPPRESSION IN
This line is a 9V Suppression Input. Voltage ≥ 5 will suppress. Voltage < 3.5V or an
open will not suppress the transponder.
Pin 10; EXTERNAL STANDBY~
GND (<10 ohms) on this pin will prevent replies and squitters.
Pin 11; 11 - 33 V DC
Aircraft Power
Pin 12; 11 - 33 V DC
Aircraft Power
Pin A; AIRCRAFT GROUND
This pin provides an internal connection to chassis and may be used as the third wire
for RS-232 busses.
Pin B; GILLHAM ALTITUDE B4/RS232 GPS RX
This line is programmable as a Gillham altitude input as defined for pin 8 or as the
receive line of an RS-232 port used to receive GPS information to support ADS-B.
Pin C; GILLHAM ALTITUDE B2/RS232 GPS TX
This line is programmable as a Gillham altitude input as defined for pin 8 or as the
transmit line of an RS-232 port used to receive GPS information to support ADS-B.
Rev 0, October/2002 10563I00.JA
KT 73
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