Garmin GDL 59 – Data Logger & Wi-Fi Datalink Installation Manual - Page 25

4.2 Power Functions 4.2.1 Aircraft Power The GDL 59 has four inputs pins for the two Aircraft Power busses of 14/28VDC. For 28V systems, only one pin from each Aircraft Power input (pin 71 or 72 for Aircraft Power 1, and pin 48 or 49 for Aircraft Power 2) is required, plus the same number of Power Ground pins. For 14V systems, both pins from each Aircraft Power (1 & 2) input are required, plus the same number of Power Ground pins. Pin Name AIRCRAFT POWER 1 AIRCRAFT POWER 1 AIRCRAFT POWER 2 AIRCRAFT POWER 2 POWER GROUND POWER GROUND POWER GROUND POWER GROUND Connector Pin I/O P591 71 In P591 72 In P591 48 In P591 49 In P591 52 -- P591 53 -- P591 54 -- P591 55 -- AIRCRAFT POWER 1 and AIRCRAFT POWER 2 are "diode ORed" to provide power redundancy. 4.2.2 Remote Power Off The GDL 59 powers down upon receiving the remote power-off signal. DATA LINK REMOTE PWR OFF is a non-configurable discrete input conforming to: a) Low: 0 VDC < Vin < 3.5 VDC, OR Rin > 100k ohms (inactive) b) High: 8 VDC < Vin < 36 VDC (active) Pin Name DATA LINK REMOTE POWER OFF Connector Pin I/O P591 75 In 4.3 Installation Selection Pins 4.3.1 Iridium Status Inputs Pin Name IRIDIUM 1 STATUS DISCRETE* IN IRIDIUM 2 STATUS DISCRETE* IN Connector Pin I/O P591 56 In P591 76 In GDL 59 Installation Manual 190-00837-00 Page 4-3 Revision C