Sanden SN3500, Installation Manual, Page: 42 / 150

Installation
82005-IM-K Sandel SN3500 Installation Manual Page 3-7
P1-30: Audio Out
LL audio output to the audio panel for optional callouts alerts. (Future use, not
currently supported.)
3.3.2 Connector P-2 Pinout Descriptions
P2-1: Signal Ground Return Input
This common Signal Ground Return is used for P2 analog signal grounds
such as the Z lead of synchros, and analog signal shield grounds. See the
installation wiring diagrams for details. Do not use this pin to connect digital
signal ground return shields or use this for power ground return.
P2-16: AC Excitation Input for P2 inputs
Connection to this pin is required only if functions of ARINC 407 synchro or
400Hz AC sine and cosine inputs on P2. It does NOT apply to
outputs on
P2. The input requirements are 26Vac nominal 400Hz. Input frequency is
560 Hz. maximum and 240 Hz. minimum. Input impedance is 220K

. 24
AWG shielded wire is recommended for this function.
P2-31: GPS1/FMS 1 429A/422+/232 Gnd
P2-17: GPS1/FMS 1 429B/422-/232 Signal
Main input from GPS/FMS 1.
P2-2: GPS2/FMS 2 429A/422+/232 Gnd
P2-32: GPS2/FMS 2 429B/422-/232 Signal
Main input from GPS/FMS 2.
P2-18: VHF Nav-1 ILS Energize Input
This pin controls the Vertical Deviation Bar when selected to
NAV1
. These
signals also control the ILS Lockout logic so the SN3500 can sense when a
GPS receiver is inappropriately selected as the primary NAV source when ILS
Lockout is not disabled on the NAV maintenance page. Connections to these
pins are from the respective VHF navigation receiver and optionally by the
GPS receiver. The logic level of these inputs is selected on the NAV
maintenance page, and is normally active-low.
P2-3: VHF NAV1 429A/Composite
P2-33: VHF NAV1 429B
Primary 429 input from VHF NAV1, or composite input from analog receiver
for VOR bearing pointer. Composite is normally .5v VOR / .33v LOC. For 3V
inputs a series resistor is required, see the installation drawings. When using
the composite input for LOC deviation, the calibration procedure found in
section 7.1.5 must be followed for each specific LOC input. 24 AWG shielded
wire is recommended for these connections. Note: When using the composite
signal for the localizer deviation input, the calibration procedure found in
section 7.1.5 must be performed after the installation prior to release for flight.