SYSTEMS CARD FILES -RSCF POWER INTERFACES
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SYSTEMS CARD FILES -ARINC 429 AND 629 INTERFACES
General
The interface cards in the system card files interface with their systems. They send and receive this type of information:
*
ARINC 429 digital data
*
Analog
*
Analog discretes.
The interface cards also interface with other airplane systems. They send ARINC 429 data to and receive ARINC 429 data from the ASG cards.
The cargo smoke detectors also interface with other airplane systems. They send ARINC 429 data to and receive ARINC 429 data from the ASG cards. The cargo smoke detectors are not located in the system card files.
The ASG cards convert ARINC 429 data to ARINC 629 data and send it to the left and right systems ARINC 629 buses. They also receive ARINC 629 data from the left and right systems ARINC 629 buses. They convert this data to ARINC 429 data and send it to the interface cards and the cargo smoke detectors.
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SYSTEMS CARD FILES -ARINC 429 AND 629 INTERFACES
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SYSTEMS CARD FILES
Purpose
The left systems card file (LSCF) and right systems card file (RSCF) hold interface cards for the member systems LRUs. Each systems card file gives ARINC 429/629 and ARINC 629/429 communications and power supply connections.
Physical Description
The systems card files chassis have machined and sheetmetal parts.
A typical card file has these dimensions:
*
Length 26.4 inches
*
Height 17.85 inches
*
Width 13.6 inches
Maximum weight of the systems cardfile chassis is 40 pounds.
There are eighteen positions for interface cards in each of the two systems card files. Centralized power takes four of these positions in each systems card file.
The power switches on the A3 and A18 linear/monitor cards extend through the card file cover.
Training Information Point
The RSCF chassis is the same as the LSCF chassis except that it holds right airplane electrical systems or one channel of a dual redundant system. The RSCF chassis has a different part number than the LSCF chassis and different member system LRU slot assignments.
There is an ESDS jack located above each systems card file chassis.
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777 AIRCRAFT MAINTENANCE MANUAL
SYSTEMS CARD FILES
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SYSTEMS CARD FILES -ASG CARDS
Purpose
ARINC 629 signal gateway (ASG) cards change data format between ARINC 429 and ARINC 629. The ASG cards move data between the LRU interface cards in the left and right systems card files and the left and right systems ARINC 629 buses. The ASG cards also move data between the forward and aft cargo smoke detectors and the left and right systems ARINC 629 buses.
Physical Description
A typical card has these dimensions:
*
Length 12 inches
*
Height 7.43 inches
*
Width 0.6 inch maximum with component protrusion
Maximum weight 1.9 pounds.
Training Information Point
The ASG cards are interchangeable.
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777 AIRCRAFT MAINTENANCE MANUAL
SYSTEMS CARD FILES -ASG CARDS
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SYSTEMS CARD FILES -ASG CARD FUNCTIONAL DESCRIPTION
General
An ARINC 629 signal gateway (ASG) card changes ARINC 429 data from LRU interface cards and cargo smoke detectors to ARINC 629 data. It sends this data to an ARINC 629 system bus.
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