usitt RP - 1 USITf Recommended Practice RP-l CONTACT FUNCTION ASSIGNMENTS FOR MULTI-CIRCUIT CIRCULAR PIN CONNECTORS USED FOR TIlE DISTRIBUTION OF MULTIPLE LIGHTING CIRCUITS USITT ENGINEERING COMMISSION nited State Institute for Theatre Technology, Inc. 6443 Ridings Road Syracuse, NY 13206-1111 Copyright © 1997 United States institute for Theatre Technology, Inc. In order to promote uniform use within the entertainment industry, listed below are the suggested contact function assignments for the 19-contact and 37-contact circular pin connectors used for distribution of multiple lighting circuits. Since the practice of using these connectors has evolved over time using available connectors, the 19-contact connector and the 37-contact connector do not follow the same philosophy. Furthermore, while this document expresses the preferred practice, many cables currently in use in the field employ variations to this Recommended Practice. Known variations are noted under "comments" so that users will be aware of these situations and adjust accordingly. TZ>&T WI I N T E R I 9 9 9 57