Sandia Aerospace SAC 7-35 - Manual (Page 18)

The SAC 7-35 uses crimp type Sub-D connectors with screw lock assemblies. The proper
crimp tool for use with machined Sub-D connector pin and sockets is required to ensure that the
wire and connector have good electrical and mechanical bond.
3.6 ELECTRICAL INSTALLATION
The SAC 7-35 is designed to operate from 11-32 Vdc without any special wiring consider-
ations. Power can be supplied from the aircraft buss through a 2 Amp circuit breaker. Since the
SAC 7-35 is TSO’d as an encoder, power can also be supplied from the onboard transponder. If
power is supplied from the transponder, the SAC 7-35 and it’s airdata functions will not operate
if the transponder is turned off or removed from the aircraft.
NOTE: If the power source for the SAC 7-35 is from the on board
transponder, the SAC 7-35 and it’s airdata outputs will not be
available if the transponder is turned off or removed from the
aircraft.
SAE document AS8003 Minimum Performance Standard for Automatic Pressure Altitude Code
Reporting Equipment states that “a means shall be incorporated in the equipment to indicate the
loss of electrical power or the effect thereof, unless the electrical power to operate the code
generating equipment is supplied by an ATC Transponder which also supplies an indication of
this power loss.” The two power pins 14 and 8 on P101 are internally connected in the SAC 7-
35. Only one of these connections is necessary to supply power to the unit. The unused con-
nection can be used to drive a panel-mounted indicator if desired.
Shoulder Washer Insulating Washer
Lock Washer
Nut
Figure 3-4
STP 78 OAT Probe Mounting
305586-00 17
Installation to be in accordance with FAA
AC 43.13-1B