Rs-232 Serial Data Electrical Characteristics - Garmin GTX 327 Installation Manual

2.6.3 RS-232 Serial Data Electrical Characteristics

The GTX 327 can be configured to include GPS, Altitude and Airdata data inputs on two RS-232 input
lines. Altitude data supplied to the GTX 327 can be output to the 400/500 Series Garmin products on an
RS-232 output line.
RS-232 OUT 1
RS-232 IN 1
RS-232 IN 2
The RS-232 outputs conform to EIA Standard RS-232C with an output voltage swing of at least ±5 V
when driving a standard RS-232 load. Refer to figure B4 on page 43 for the RS-232 serial data
interconnect and to section 3.3.5 for RS-232 serial data configuration.
GTX 327 Installation Manual
190-00187-02
Table 2-9. RS-232 Input/Output Pin Assignments
PIN NAME PIN NUMBER
20
19
2
I/O
Out
In
In
Page 17
Rev J