Honeywell MKXXII System Wiring/ Electr ical Interfaces, Primary Power Input, Chassis Ground

Honeywell

MK XXII EGPWS Installation Manual

SECTION III – SYSTEM PLANNING

3.1 Introduction

This section provides information for selecting features and wiring the electrical interfaces of the MK XXII EGPWS. Sample wiring diagrams for the most commonly used MK XXII EGPWS configurations are provided in Appendix B. Appendix E Section E 3 groups features (functions) into sets called Categories. This document follows the Category structure of the Appendix E . It provides descriptions of the features and instructions for selecting features and for determining the correct wiring.

1.Make a copy of Appendix E Table E 3. Use this table along with Appendix A Fig A-1.1, A1.2, and A1.3 to record feature selection and determine the wiring interface.

3.2 System Wiring/ Electr ical Interfaces

System wiring is broken down into the following main components:

-Electrical Interfaces (power and ground)

-GPS Antenna

-Analog and Digital Inputs

-Discrete Inputs

-Serial Outputs

-Audio Outputs

-Discrete Outputs

-Configuration Module

Many of these inputs and outputs will be defined as the Categories are selected for Configuration Module programming. Appendix E Table E 4 shows the typical usage for each pin, on the Left (J1), Right (J2) and Upper (J3) connectors.

3.2.1 Primary Power Input

The MK XXII EGPWC requires a primary power input (28 VDC input power) and ground. The Primary power should be connected as follows.

Pin

J1-40, J1-60

J1-41, J1-61

Signal

+28 VDC Input

+28 VDC Return

Recommended EGPWC Power Control Device: 3 Amp Delayed Action Circuit Breaker

3.2.2 Chassis Ground

Chassis ground provides a redundant metal connection and should not be used as a normal current carrying conductor. Chassis ground should be connected as follows:

Pin

J1-42, J1-53

Signal

GND

CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 060-4314-225 REV: C SHEET 57