Northern Airborne Technology AA37 - Manual (Page 7)

SM39 Rev. 4.00 AA37 Series Alerting System Manual
Nov 10, 2003 Page 1-1
ENG-FORM: 800-0103.DOT
Section 1.0 Description
1.1 Introduction
This manual contains information on the AA37 series Alerting Systems.
Information in this section consists of purpose of equipment, features and specifications.
1.2 Purpose of Equipment
The AA37 series are dual channel Alerting Systems that provide two or three level
alerting.
1.3
Features
The AA37 Alerting Systems are compact, remote mounted units. All outputs are fully
isolated to allow installation in dual audio controller systems. Trigger inputs can be
active low or active high dependent on the model, allowing easy interface to common
aircraft systems. The tone and rate of the alerts are adjustable to allow tailoring of the
tones to ensure they do not interfere with existing airframe warning functions.
1.4 Specifications
1.4.1
Electrical Specifications
Input Power 27.5 Vdc at 200 mA (nominal)
Input Signals
Alert 1
AA37-001 2 active low triggers, 30 mA max.
AA37-002 2 active high triggers, 30 mA max.
AA37-212 2 active low triggers, 30 mA max.
Alert 2 (all models) 2 active low triggers, 30 mA max.
Alert 3 (AA37-212 only) 2 active low triggers, 3 mA max.