Sandia Aerospace ST 32 - Manual (Page 9)

SECTION 2
INSTALLATION CONSIDERATIONS
2.1 I NTRODUCTION
The ST 32 has been designed to covert four channels of sinusoidal and monopole outputs of approved Tach Generators
and one channel of strain gauge pressure to a digital output that can be used by onboard navigation systems. .
2.2 M
OUNTING
The ST 32 can be mounted in any axis either inside or outside the pressure vessel. To ensure protection against lightning
strikes, the case should be grounded to airframe ground. This can be most easily accomplished by mounting the case on a
grounded surface. An option mounting tray, Sandia part number 305057-00 is available as an option. Bonding of the case
to airframe ground shall be less than 2.5 mohms
2.3 C OOLING
The ST 32 does not require external Cooling
2.4 E LECTRICAL
The ST 32 operates on 18-32.2 Vdc. Power to the ST 32 should be protected by a 1.5 Amp breaker or circuit
protection can be shared with the interfaced display unit using the appropriate breaker size (refer to the installa-
tion manual of the system being interfaced). The ST 32 can be wired to use from one to four channels depending
upon system interface requirements. All twisted pairs are #22 AWG. Power and ground are single wires and
should be #22 AWG or larger.
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