page_title: ExPRESS Logistics Carrier
section_title: ELC-2
hierarchical_section_title: ExPRESS Logistics Carrier / Locations and components / ELC-2
caption_attribution_description: English: ELC-2 Art Layout
context_page_description: An EXpedite the PRocessing of Experiments to Space Station Logistics Carrier is an unpressurized attached payload platform for the International Space Station that provides mechanical mounting surfaces, electrical power, and command and data handling services for Orbital Replacement Units as well as science experiments on the ISS. The ELCs were developed primarily at the Goddard Space Flight Center in Greenbelt, Maryland, with support from JSC, KSC, and MSFC. ELC was formerly called "Express Pallet" and is the unpressurized counterpart to the pressurized ExPRESS Rack. An ELC provides scientists with a platform and infrastructure to deploy experiments in the vacuum of space without requiring a separate dedicated Earth-orbiting satellite.
  ELCs interface directly with the ISS integrated truss common attach system. The P3 Truss has two such attach points called Unpressurised Cargo Carrier Attachment System mechanisms, one facing zenith called UCCAS-1, the other facing nadir called UCCAS-2. The S3 Truss has four similar locations called Payload Attachment System mechanisms, two facing Zenith, and two facing Nadir.
context_section_description: ELC-2 is located on the S3 truss at the PAS-1 (zenith, space facing) site, alongside AMS-2 at PAS-2. ELC-2 weighs approx. 13,400 lbs.
  FRAM-1 (top side)  DCSU placed here by SPDM from ESP-2 on Jan. 30, 2013. (CTC-3 moved to FRAM-2 for a test of the SPDM December 22/23, 2011)
  FRAM-2 (top side)  Cargo Transport Container-3 (CTC-3) launched on ELC-2 (moved from FRAM-1 – see above)
  FRAM-3 (top side)  MISSE-FF Facility FRAM formerly held an ExPRESS payload adapter (ExPA) as MISSE base - MISSE-8 was removed by the Exp. 36 crew Jul. 2013 (STS-134 added MISSE-8 replacing MISSE-7 which was launched on ELC-2. STS-135 added MISSE-8 'ORMatE-III exposure plate' to the second MISSE mount). (removed by SPDM and stored in the trunk of SpaceX Dragon CRS-10 for disposal after the black box was removed by the crew. MISSE-FF was delivered on SpaceX CRS-14 and installed on April 12, 2018 by SPDM/Dextre to replace the old unit.)
  FRAM-4 (top side)  High Pressure Gas Tank (HPGT) (Oxygen depleted) replaced the one carried up on ELC-2, which was used to replace a depleted tank from Quest in EVA during STS-129
  FRAM-5 (top side)  Control Moment Gyroscope (CMG SN102) launched on ELC-2
  FRAM-6 (keel side) Pump Module (PM SN0004). Originally held PM SN0005, launched on ELC-2. Healthy SN0005 and degraded SN0004 (on ESP-2) swapped robotically on 6 March 2015.
  FRAM-7 (keel side) NICER FRAM originally held an MBSU (delivered by the HTV-4 Exposed Pallet, and placed here by the SSRMS/SPDM Aug. 2013) removed by Expedition 32 crew and installed on truss degraded unit brought inside and returned to earth on the maiden flight of Dragon on SpX-C2.
  FRAM-8 (keel side) Mobile Transporter Trailing Umbilical System-Reel Assembly (MT TUS-RA) launched on ELC-2
  FRAM-9 (keel side) Nitrogen Tank Assembly (NTA SN0003) launched on ELC-2
caption: ELC-2 in its launch configuration, note changes since installation
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