190-01499-10
GTX 35R/45R Installation Manual (Non-Certified Aircraft)
Rev. 1
Page 5-9
5.6.3
HSDB
The HSDB interface uses Ethernet wiring to communicate with certain Garmin panel-mount navigators
and active traffic systems.
Table 5-9 Ethernet Inputs and Outputs
5.6.4
RS-422
The RS-422 interface conforms to the electrical specifications of EIA standard RS-422.
Table 5-10 RS-422 Outputs
5.7
Suppression Bus
The EXTERNAL SUPPRESSION is intended for connection to other L-band equipment, such as a DME
or UAT. The output is active whenever the GTX 35R/45R transmits. When driven by another source, the
GTX 35R/45R transponder receiver and transmitter functions will be suppressed.
The EXTERNAL SUPPRESSION output is driven to
≥
18 VDC when the GTX 35R/45R transmits. An
input voltage of
≥
10 VDC will suppress the GTX 35R/45R.
Table 5-11 External Suppression Bus Pin
Pin Name
Connector
Pin
I/O
ETHERNET OUT 1A
P3252
6
O
ETHERNET OUT 1B
P3252
1
O
ETHERNET IN 1A
P3252
7
I
ETHERNET IN 1B
P3252
2
I
ETHERNET OUT 2A
P3252
8
O
ETHERNET OUT 2B
P3252
3
O
ETHERNET IN 2A
P3252
9
I
ETHERNET IN 2B
P3252
4
I
Pin Name
Connector
Pin
I/O
RS-422 A
P3252
11
O
RS-422 B
P3252
12
O
Pin Name
Connector
Pin
I/O
EXTERNAL SUPPRESSION
P3251
18
I/O