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MK XXII Installation Manual
CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 060-4314-225 REV: C
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APPENDIX C – WinViews Operation Instructions
RS-232 COMMUNICATION WITH THE EGPWS
The EGPWS contains software that allows monitoring of its internal parameters, for testing
purposes, without altering its operation. The monitoring of these parameter values enables the
operator to quickly determine if the correct signal and scaling is being used by the EGPWS
computer. The communication link utilizes the RS-232 Communication Protocol configured as
follows:
19200 Baud, No Parity, 8 bits, and 1 stop bit.
The RS-232 interface with the EGPWS is accomplished via the J3 test connector on the front of
the EGPWS. The connection between a PC (with a standard DB9 serial port connector) and the
EGPWS RS-232 interface is defined as follows: (Please note that the EGPWS will activate its RS-
232 port only when it receives the command CONTROL Z after power is applied to the EGPWS.
The CONTROL Z command is automatically sent by WinVIEWS)
RS-232 Receive RS-232 Transmit RS-232 Ground
EGPWS Front Connector
Pin 3 Pin 4 Pin 1
Standard DB9 Connector (for a PC)*
Pin 3 Pin 2 Pin 5
*NOTE:Some PC Comm Ports have Pins 2 & 3 reversed from what is described above.
The mating connector for the EGPWS J3 test connector is a male (pins) 15 pin double density D-
subminiature type, Positronics Industries (kit) part number ODD15M1OYOZ or the following
individual parts:
Nomenclature (AMP) Amp Part Number Military Part Number
Connector Shell (HDP-22 Crimp Snap In Contact) 748364-1 reference MIL-C-24308
Size 22 DM Crimp Snap In Contacts Pin 0.030 204370-2 M39029/58-360
Backshell (Shielded Cable Clamp Assembly) 745854-5
Jackscrews, 2 required (4-40 Male Jackscrew Kit) 747784-8
Grommet Sets 747746-1
The following tools will work with Positronics, Amp, and Mil Spec Connectors:
Insertion / Extraction Tool 91067-1 M81969/1-04
Hand Crimp Tool M22520/2-01
Positioner M22520/2-09