Dual Gtx 327, Single Encoder, Serial Input Connections; Encoded Altitude Pin Assignments - Garmin GTX 327 Installation Manual

2.6.2.1 Altimeter Inputs
ALTITUDE D4
ALTITUDE A1
ALTITUDE A2
ALTITUDE A4
ALTITUDE B1
ALTITUDE B2
ALTITUDE B4
ALTITUDE C1
ALTITUDE C2
ALTITUDE C4
ALTITUDE COMMON
RS-232 IN 2
* Altitude Common may be connected to pin 13 or 25. See note 4 on figure B4, page 43.
2.6.2.2 Altimeter Calibration and Checkout
Refer to section 3.3.9 for the gray code altitude checkout.
2.6.2.3 Altimeter Interconnect, Dual GTX 327 Installation
Refer to figure B5 on page 45 for Dual GTX 327 altimeter interconnections. A dual GTX 327 installation
can accept either parallel wire gray code altimeter input as shown in figure B5 or RS-232 serial data input
as shown below.
Figure 2-2. Dual GTX 327, Single Encoder, Serial Input Connections
For a complete dual installation containing two encoders, it is best to connect one encoder to each
transponder.
GTX 327 Installation Manual
190-00187-02
Table 2-7. Encoded Altitude Pin Assignments
PIN NAME PIN NUMBER
18
3
5
6
9
11
12
10
4
7
13 or 25*
19
I/O
In
In
In
In
In
In
In
In
In
In
--
In
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Rev J