Installation
82005-IM-K
Sandel SN3500 Installation Manual
Page 3-4
3.3
Signal Details
The following information is in the same order as the summary pin description list
in the prior section.
3.3.1
Connector P-1 Pinout Description
P1-1: Signal Ground Return Input
This common Signal Ground Return is used for P1 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.
P1-16: Primary AC Excitation Input for P1 inputs
Connection to this pin is required only if functions of ARINC 407 synchro or
400Hz AC sine and cosine inputs are used on P1. NOTE: This is also the
reference for synchro referenced
outputs
on the opposite connector 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.
P1-31: TCAS 429 A
P1-17: TCAS 429 B
Optional ARINC 429 input for traffic.
P1-2: Data link A
P1-32: Data link B
Optional input for FIS-B data link (Software Rev. 3.0 and above).
P1-3: Hdg X; Hdg 429A; DG Stepper A Input
P1-33: Hdg Y; Hdg 429B; DG Stepper C Input
Master HDG inputs.
For XYZ type directional gyro, ground the Z leg to signal ground P1-1. This
input is referenced to the 26Vac/400Hz reference on P1-16. This function is
selected on the Compass maintenance page.
Stepper connections are used exclusively for connections to the Bendix/King
KG-102 or Mid-Continent series Directional Gyro when selected in the
Compass maintenance page. For slaved operation see fluxgate descriptions.
24 AWG twisted shielded pair wire is recommended for this connection.
P1-19: Hdg Valid Input
Connect to the (DG) valid output if available. Not used for 429 sources.
Selection of the logic level of this pin is in the Compass maintenance page.
P1-4:
ADF-1 AC-X or DC-SIN Input / TACAN 2 429/419 A
P1-34: ADF-1 AC-Y or DC-COS Input / TACAN 2 429419 B
Summary of Contents for SN3500
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