The intention of the Control Protocols Working Group at this time is to reaffirm the existing standards as they are, but this is, of course, contingent on any objections or comments that the public might offer. The public review forms are accessible at http://tsp.plasa.org/tsp/documents/public_review_docs.php. The standards themselves are being sold by The ESTA Foundation at http://www.estafoundation.org/pubs.htm at their normal prices.
ANSI E1.3 describes a method of controlling equipment by means of an analogue control voltage in the nominal range from zero to 10 volts positive. It is primarily intended for theatrical lighting controllers and controlled devices (e.g., dimmers), but any device could use this control method. E1.3 controllers are current-source devices. The committee proposes to reaffirm the existing standard, which was previously reaffirmed in 2006.
ANSI E1.27-1 is a standard for portable data cable used in USITT DMX512/1990 and ANSI E1.11-2004 lighting control systems. E1.27-1 standardizes the wiring of the data cable and requires labelling so single data-pair and dual data-pair cables can be distinguished from each other. The committee proposes to reaffirm the existing standard.
(Jim Evans)
