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LAT Thermal Vac EGSE Cabling

LAT Thermal Vac EGSE Cabling. TVAC Electrical Layout Drawing. SIIS Harness Wire Count (1/2). SIIS Harness Wire Count (2/2). Test Signal Wire Count . Total Counts. Near Term Issues/Work. Need to order long lead items such as TVac connectors GSE Heaters

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LAT Thermal Vac EGSE Cabling

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  1. LAT Thermal VacEGSE Cabling

  2. TVAC Electrical Layout Drawing

  3. SIIS Harness Wire Count (1/2)

  4. SIIS Harness Wire Count (2/2)

  5. Test Signal Wire Count

  6. Total Counts

  7. Near Term Issues/Work • Need to order long lead items such as TVac connectors • GSE Heaters • Heater requirements are quickly being developed • 1553 Port plate configuration • SIIS harness will not reach all the necessary port plates • Investigate modifying harness by “breaking out” cables further from main harness. • Not obvious from drawings if this is possible. • When SIIS harness is delivered (March 21),an evaluation can be made. • Other possibility is to build extension cables. • Not desirable since it adds more interfaces. • Harness routing • Bend radius • Strain relief • Not using SIIS Cable implementation of 1553. • Consolidates prime and redundant via 1553 couplers • VSC needs all four 1553 penetrations through port plates

  8. Near Term Issues/Work • Facility Drawing • Port plate location relative to LAT • Used to determine cable lengths inside chamber • Locate EGSE outside chamber • Used to determine cable lengths outside chamber • Facility power capability for EGSE • Thermocouples • How the thermocouples will be grouped on the LAT end is TBD. • Wirelist • Work is just starting • Minor issue with flyaway thermistor count • One to many sensors to fit all on 2 connectors • Need to balance need for thermistor and cable complexity

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