Sandel ST3400 - P3 Connector; View of Mating Connector to P3

4.7 P3 Connector
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)
1
Aircraft Pwr
In
Power
9
Aircraft Pwr
In
Power
2
n/c
n/c
10
n/c
n/c
3
Aircraft Ground
In System Ground
11
Aircraft Ground
In System Ground
4
GS OVRD Lamp
(Out)
(Open Drain)
12
FLAPS OVRD
Lamp
(Out)
(Open Drain)
5
n/c
In Factory use only DO NOT CONNECT
13
TAWS INH
In Optional external TAWS INH switch
Discrete Valid
6
Lamp Test
In Optional external enunciator test
Discrete Valid
14
Warning Lamp
Out Optional
Open Drain
7
Caution Lamp
Out Optional
Open Drain
15
TAWS INH Lamp
Out Optional
Open Drain
8*
Selectable
Discrete*
(Out) TCAS INH (TAWS Warn or Caution);
-or- GPWS FAIL ;
-or- TCAS INDICATOR discrete to TCAS-II
-or- AUDIO ENABLE relay drive
(Open Drain) Selectable on SYSTEM maintenance page
* Note: All discrete outputs sink 50ua of current when off. If used as TCAS
INH to a TCAS processor, this connection may require an external 30k-50k
pullup resistor in order for the discrete input of the TCAS to be at the proper
‘high’ (unasserted) voltage. If necessary, check with a voltmeter during
installation.
4.7.1 View of Mating Connector to P3
8
15
7
14
16
13
5
12
4
11
3
10
2
9
Outside View
(Mating Connector)
82002-IM-L ST3400 INSTALLATION MANUAL
4-9