Garmin GSU 75 User Manual

190-01639-00 GSU 75 ADAHRS Installation Manual
Rev. 6 Page 4-7
4.3.4 GSU 75 RS-422 Serial Input/Output
4.3.5 GMU 44 RS-485 Serial Output
4.4 GSU 75 Discrete Inputs
DISCRETE IN* pins:
INACTIVE: 10: ≤ Vin ≤ 33 VDC or Rin ≥ 100kΩ
ACTIVE: Vin ≤ 1.9 VDC with ≥ 75 µA sink current, or Rin ≤ 375 Ω
Sink current will not exceed 2.0 mA for a grounded input
DISCRETE IN pins:
INACTIVE: Vin ≤ 3.5 VDC
ACTIVE: 10 ≤ Vin ≤ 33 VDC with ≥ 75 µA source current
Source current will not exceed 2.0 mA for a 10-33 VDC input
Table 4-10 GSU 75 RS-422 I/O
Pin Name Pin I/O
RS-422 IN A 10 In
RS-422 IN B 11 In
Table 4-11 GMU 44 RS-485 I/O
Pin Name Pin I/O
RS-485 OUT A 4 Out
RS-485 OUT B 2 Out
Table 4-12 GSU 75 Discrete Inputs
Pin Name Pin I/O
DISCRETE IN 1* 56 In
DISCRETE IN 2* 78 In
DISCRETE IN 3* 76 In
DISCRETE IN 4 77 In
340095
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Garmin GSU 75 Specifications

General

Brand	Garmin
Model	GSU 75
Category	Avionics Display
Language	English