Garmin GDL 59 – Data Logger & Wi-Fi Datalink Installation Manual - Page 27
User Ethernet, Pin Name, Connector, RS-232 Serial Input/Output
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4.4.2 User Ethernet The GDL 59 has three Ethernet data busses that meet the hardware aspects of IEEE standard 802.3 for 10/100 Base T Ethernet communications. NOTE Garmin recommends leaving USER ETHERNET 3 unconnected, as it may be used for other functions in the future. Pin Name USER ETHERNET IN 3 A USER ETHERNET IN 3 B USER ETHERNET OUT 3 A USER ETHERNET OUT 3 B USER ETHERNET IN 4 A USER ETHERNET IN 4 B USER ETHERNET OUT 4 A USER ETHERNET OUT 4 B USER ETHERNET IN 5 A USER ETHERNET IN 5 B USER ETHERNET OUT 5 A USER ETHERNET OUT 5 B Connector Pin I/O P591 6 In P591 26 In P591 5 Out P591 25 Out P591 8 In P591 28 In P591 7 Out P591 27 Out P591 2 In P591 22 In P591 1 Out P591 21 Out 4.4.3 RS-232 Serial Input/Output The RS-232 outputs conform to EIA/TIA-232C with an output voltage swing of at least ±5 V when driving a standard RS-232 load. RS-232 Channels 1 and 2 are to be used for communication with optional GSR 56 units (if installed). Pin Name RS-232 OUT 1 RS-232 IN 1 RS-232 OUT 2 RS-232 IN 2 Connector Pin I/O P591 63 Out P591 64 In P591 65 Out P591 66 In GDL 59 Installation Manual 190-00837-00 Page 4-5 Revision C