UL-1577 Complete Document History
Standard for Optical Isolators

Complete Current Edition:
   5TH EDITION - Standard for Optical Isolators - April 25, 2014
   CHANGE 01/15 - REVISION CHANGE - CODE A - Jan. 23, 2015
   CHANGE 06/19 - REVISION CHANGE - CODE A - June 11, 2019
   CHANGE 07/23 - REVISION CHANGE - CODE A - July 6, 2023

Obsolete Revision Information:
   CHANGE 01/13 - REVISION CHANGE - CODE A - Jan. 23, 2013
   CHANGE 5/2012 - REVISION CHANGE - CODE A - May 4, 2012
   CHANGE 3/2011 - REVISION CHANGE - CODE A - March 18, 2011
   CHANGE 01/10 - REVISION CHANGE - CODE A - Jan. 20, 2010
   4TH EDITION - Standard for Optical Isolators - May 10, 2000
   3RD EDITION - Standard for Optical Isolators - March 31, 1995
   2ND EDITION - Standard for Optical Isolators - Jan. 1, 1989
   1ST EDITION - Standard for Optical Isolators - Jan. 1, 1986