2014-10-212014-10-212014-07-13978-0-692-38220-2ICES-2014-196http://hdl.handle.net/2346/59693The 44th International Conference on Environmental Systems was held in Tuscon, Arizona, USA on 13 July 2014 through 17 July 2014.William Papale, UTC Aerospace Systems, USACinda Chullen, NASA Johnson Space Center, USAColin Campbell, NASA Johnson Space Center, USABruce Conger, Alliant Techsystems Inc., USASummer McMillin, Jacobs, USADevelopment activities related to the Rapid Cycle Amine (RCA) Carbon Dioxide and Humidity control system have progressed to the point of integrating the RCA into an advanced Portable Life Support System (PLSS) 2.0 to evaluate the interaction of the RCA among other PLSS components in a ground test environment. The RCA 2.0 assembly (integrated into PLSS 2.0) consists of a valve assembly with commercial actuator motor, a sorbent canister, and a field-programmable gate array-based process node controller. Continued design and development activities for RCA 3.0 have been aimed at optimizing the canister size and incorporating greater fidelity in the valve actuator motor and valve position feedback design. Further, the RCA process node controller is envisioned to incorporate a higher degree of functionality to support a distributed PLSS control architecture. This paper will describe the progression of technology readiness levels of RCA 1.0, 2.0 and 3.0, along with a review of the design and manufacturing successes and challenges for 2.0 and 3.0 units. The anticipated interfaces and interactions with the PLSS 2.0/2.5/3.0 assemblies will also be discussed.application/pdfengPresentation