Utilizing exchangeable modules, the MultiPep RSi can be configured to enable the synthesis of small scale peptide libraries, membrane bound peptide arrays (SPOT method), specialty peptides or PNAs, as well as high quality peptides in large scales up to 10 mmol. Due to this flexibility, the instrument can take the place of multiple peptide synthesizers and meet requirements of core facilities, research labs, and custom synthesis houses. The software for the instrument is both easy-to-use and powerful, giving the advanced user full control of synthesis parameters.