Sandel ST3400 - Sensor and Navigation Input Interfaces

4.5 Connector P1
For electrical characteristics, see the table in section 4.9 by referencing the signal
type indicated in italics. Signal types enclosed in parentheses indicate
functionality that is reserved.
Pin # Name Signal Type (dependent on maintenance page selection)
16
Inverter Exc.
In Note: May be same or different than P2-16 inverter source.
Inverter 26Vac Excitation for items on connector P1
1
Shield Gnd
31
FMS1A Primary
In
A429 A side 429
(RS422) + side 422
(RS232) Ground side
17
FMS1B Primary
In
A429 B side 429
(RS422) - side 422
(RS232) Rx
2
Radalt1A
In
A429 A side 429
RadAlt Analog DC+ [ALT 50/55, ARINC 552, RT220/300, RT200]
32
Radalt1B
In
A429 B side (429)
RadAlt Analog DC- [ALT 50/55, ARINC 552, RT220/300, RT200]
18
Radalt1 Valid
In
Discrete Valid Discrete, Note: Not used when 429 is data source
3
Hdg1A
In
A429 A side 429
A407 Synchro X [Z grounded]
33
Hdg1B
In
A429 B side 429
A407 Synchro Y [Z grounded]
19
Hdg1 Valid
In
Discrete Valid Hdg Analog, Note: Not used when 429 is data source.
4
ADF1A
In
A429 A side 429
DC Sin DC Sine
A407 Synchro X [Z grounded]
34
ADF1B
In
A429 B side 429
DC Cos DC Cosine
A407 Synchro Y [Z grounded]
20
ADF1 DC Ref
In
ADF Ref ADF DC, Note: Not used when 429 or XYZ is data source.
5
ADF1 Valid
In
Discrete Valid ADF Discrete, Note: Not used when 429 is data source
35
Nav1A
In Note: For composite inputs see P2-42
A429 A side 429
(RS422) + side 422
(RS232) Ground side
21
Nav1B
In Note: For composite inputs see P2-42
A429 B side 429
(RS422) - side 422
(RS232) Rx
82002-IM-L ST3400 INSTALLATION MANUAL
4-3