User guide

SAFE 528
Avionics Cooling Fan
With Fault Detection
INSTALLATION MANUAL
SANDIA aerospace
Albuquerque, NM 87109
www.sandia.aero
1.1 INTRODUCTION
This sheet describes the installation of the SAFE528 Blower with fault detection output. It is intended for use by air-
frame manufacturers and certified repair stations to install the SAFE528 and includes both mechanical and electrical
installation information. The installer should insure that the SAFE528 is operating according to its intended function.
1.2 PRODUCT DESCRIPTION
The SAFE528 is an avionics cooling fan that provides an operating indication. When the fan is normally operating, this
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 SAFE528.
1.3 TECHNICAL CHARACTERISTICS
1.3.1 PHYSICAL CHARACTERISTICS
Width 2.10” Height 5.13”
Depth 6.74” Weight 1.19 lb
Figure 1
Dimensional Drawing
1.3.2 OPERATIONAL CHARACTERISTICS
Operating Voltage 22-31Vdc
Current Operating .400 AmpsNominal
Start-up .550 Amps
Air Flow (All Ports) 20 CFM No Static Pressure (10CFM @ .08 H
2
O Static Pressure)
Operating Temp -20 to +55
o
C
Max Operating Altitude 55,000 Feet
305738-00
Rev. B 10/8/12
ECN 3932