Installation
82005-IM-K
Sandel SN3500 Installation Manual
Page 3-9
default. A different calibration value setting is used for each possible NAV
source selectable on the SN3500. 24 AWG twisted shielded pair conductor is
recommended for these functions. Please see the warnings on the installation
drawings concerning DC REF, which must not be inadvertently grounded..
P2-24: Flux Gate Excitation Input
This connection is made to the 400 Hz AC flux gate excitation source voltage.
A 24 AWG shielded wire is recommended for this function. Note: the phase
of this excitation voltage is not required to be the same as that supplied to the
Primary AC Excitation input on P1 or P2.
P2-9:
Flux Gate X Input
P2-39 Flux Gate Y Input
P2-25: Flux Gate Z Input
Referenced to P2-24 Excitation input. Connections to these pins are made
directly from the heading system flux gate if internal slaving is selected on the
compass maintenance page. If a Bendix/King KI-525 PNI or Rockwell/Collins
331A-3( ) HSI is being removed, the respective slaving accessory, should be
bypassed. See the installation drawings for details. 24 AWG twisted shielded
triple conductor is recommended for these signals.
P2-10: HDG/CRS
Datum
Excitation
This is a
ground referenced
400-5Khz excitation input for the HDG Datum and
CRS Datum outputs only. This input is only used if referenced on the
applicable installation drawing. If unused, Connect P2-10 to 28vdc P3-1.
P2-40: Course Datum Output
P2-26: Heading
Datum
Output
These function are either AC or DC Course Datum and Heading Datum for the
flight control system. If AC signals, the excitation reference is P2-10.
Selection of AC/DC, gain, and direction of rotation are accomplished on the
FCS maintenance page. 24 AWG single conductor shielded wire is
recommended for each of these functions.
P2-11: HDG Bootstrap X out
P2-41: HDG Bootstrap Y out
Z Ground. NOTE: Referenced to P1-16. This function may be used to
provide “bootstrap” output to an RMI or other directional instrument in the form
of ARINC 407 synchro 24 AWG twisted shielded pair wire is recommended for
these functions. Drive only electronic loads with this output – limited to 60ma
max.
P2-27: FCS ILS Energize Out
Active-low open drain output to FCS when selected navigation source vertical
deviation is enabled.
P2-12: FCS Lateral Flag
Low Level flag output derived from selected NAV source, referenced to
Ground. Connect corresponding ‘-‘ input to P2-1 (Gnd)
Содержание SN3500
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