Garmin GRS 77, Руководство по установке

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GRS 77/GMU 44 Installation Manual Page 1-3
190-00303-10 Revision L
1.4.2 Physical Characteristics
Specification Characteristic
GRS 77 Weight (Unit Only) 2.80 lbs. (1.27 kg)
(Installed with rack and connectors) 3.50 lbs. (1.59 kg)
GMU 44 Weight (Unit Only) 0.35 lbs. (0.16 kg)
(Installed with rack and connectors) 0.50 lbs. (0.23 kg)
Physical Dimensions:
GRS 77
Height: 3.25 inches (82.6 mm)
Width: 3.75 inches (95.3 mm)
Length: 8.50 inches (215.9 mm)
Rack length: 8.25 inches (209.5 mm)
Rack width: 3.25 inches (82.6 mm)
Physical Dimensions:
GMU 44 Height: 2.10 inches (53.3 mm) (Excluding Pigtail)
3.35 inches (85.1 mm) Dia including flange
1.4.3 General Specifications
The table below contains general environmental specifications. For detailed specifications, see the
applicable Environmental Qualification Forms.
Specification Characteristic
Regulatory Compliance RTCA/DO-160D Environmental Conditions and EUROCAE/ED-14D
Hardware Compliance GRS 77: RTCA/DO-254 Level A
Unit Software GRS 77 (software versions 3.00 and later): RTCA/DO-178B Level A
GRS 77 (software versions prior to 3.00): RTCA/DO-178B Level B
GMU 44 (all software versions): RTCA/DO-178B Level B
Operating Temperature
Range
-55
°
C to +70
°
C
Altitude 55,000 Feet
1.4.4 Power Requirements
Specification Characteristic
Power Requirements
Including GMU 44 Supply Voltage: 14/28 Vdc. See the Environmental
Qualification Form* for details on surge ratings and
minimum/maximum operating voltages. (Operating
Current: 0.3 A normal operation, 27.5 Vdc,
≤
8 watts)
*NOTE: As stated in Note 3 of the GRS 77 EQF (005-00165-31) the power inputs of the GRS 77 are
rated to sustain A4 (waveform 4 level 4 and waveform 3 level 4) if both are connected to a power input.
In the case of a single power source, where typically only one of the power pins would be used, both pins
should be connected to this wire to get A4. The splice must be in the backshell of the GRS 77. Generally
every installation should do this unless it is known that A3 on the power pins will suffice. Installations
that input 2 different power sources to the two power input pins will need to be examined on a case by
case basis.