Figure 6-12 Discrete Out Page; Table 6-8 Discrete Outputs - Garmin GTX 3X5 Series Installation Manual

Discrete Out
Function
Off
ALT ALERT
All discrete outputs on P3251 or P3252
Off
FAIL 1
P3251-17
Off
FAIL 2
All discrete outputs on P3251 or P3252
Off
RPLY ACTV
All discrete outputs on P3251 or P3252
Off
EQUIP STS
All discrete outputs on P3251 or P3252
Off
TRFC STBY
All discrete outputs on P3251 or P3252
Off
TRFC TEST
All discrete outputs on P3251 or P3252
Off
TRFC ALRT
All discrete outputs on P3251 or P3252
Off
TCAD SL
All discrete outputs on P3251 or P3252
Off
XPDR ACTV
All discretes outputs on P3251
Off
ADS-B OUT
All discrete outputs on P3251 or P3252
[1] Available in system software v2.10 or later.
190-01499-02
Rev. 9

Table 6-8 Discrete Outputs

Pin Selection

Figure 6-12 Discrete Out Page

Post Installation Configuration & Checkout
Description
When this discrete is grounded, it
indicates a deviation from the preset
altitude setting.
Failure of transponder causes discrete
to ground.
Failure of transponder causes discrete
to open.
Discrete grounds when transponder
sends replies to interrogations.
If the unit needs service soon, this
discrete will switch between open and
ground for the first 30 seconds after
power up. If after 30 seconds, there is
no detection of ADS-B In/Out failures
the discrete opens. The discrete will
ground if any ADS-B In/Out failures are
detected after 30 seconds.
Commands TAS/TCAS standby/
operate. Discrete output operation
automatically sets through TAS/TCAS
input configuration. GTX 345 only.
Commands TAS/TCAS into test mode.
GTX 345 only.
When a traffic alert is active, this
discrete will ground. GTX 345 only.
Supports automatic control and
integration with Ryan TCAD and
Avidyne TAS600 Series traffic systems.
GTX 345 only.
Discrete grounds when transponder is
not in standby.
Discrete grounds when ADS-B Out is
on and the unit does not have a valid
GPS position.
GTX 3X5 Transponder TSO Installation Manual
Notes
[1]
[1]
Page 6-13