Sandia-aerospace SAFE 128 User Manual download pdf

SAFE 128

Avionics Cooling Fan

With Fault Detection

INSTALLATION INSTRUCTIONS

SANDIA aerospace

Albuquerque, New Mexico

www.sandia.aero

1.1 INTRODUCTION

This sheet describes the installation of the SAFE 128 avionics cooling fan with fault detection output. It is

intended for use by FAA certified repair stations to install the SAFE 128 and includes both mechanical and

electrical installation information. The installer should insure that the SAFE 128 is operating according to its

intended function.

1.1 PRODUCT DESCRIPTION

The SAFE 128 is an avionics cooling fan that provides an operating indication. When the fan is normally

operating, this output is at low impedance. The output goes to high impedance whenever the RPM of the

motor drops below a preset threshold, signaling the connected avionics of the reduction in cooling from the

SAFE 128.

1.2 TECHNICAL CHARACTERISTICS

1.2.1 PHYSICAL CHARACTERISTICS

Width 2.36” Height 2.87”

Depth 1.44” (inc. pins) Weight 0.25 lb

1.2.2 O

PERATIONAL CHARACTERISTICS

Operating Voltage 22-31Vdc

Current Operating .100 Amps Nominal

Start-up <.250 Amps

Air Flow (No Load) 20 CFM (10CFM @ .08” H2O)

Operating Temp -20 to +55

Max Operating Altitude 55,000 Feet

1.2.3 CERTIFICATION

FAA-PMA PQ0894SW Diamond DA40

DO 160D [F1]BAA[S2R2(B2,M)]XXXXXXZBAZA[XX]M[XXXX][XX]XX

Figure 1

Dimensional Drawing

305468-00-IS

Rev B 09/26/06

DRN 287

1 2

SAFE 128 1

Summary of Contents

Page 1 - SAFE 128

SAFE 128Avionics Cooling FanWith Fault DetectionINSTALLATION INSTRUCTIONSSANDIA aerospaceAlbuquerque, New Mexicowww.sandia.aero1.1 INTRODUCTIONThis sh

Page 2

The SAFE 128 operates on 28Vdc. It will provide a low on Fan Fail (center pin) of the connector whenoperating normally. When airflow drops to 60% of

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Sandia-aerospace SAFE 128 User Manual

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