UL-991 Complete Document History
Standard for Tests for Safety-Related Controls Employing Solid-State Devices

Complete Current Edition:
   3RD EDITION - TESTS FOR SAFETY-RELATED CONTR - Oct. 22, 2004
   CHANGE 04/08 - REVISION CHANGE - CODE A - April 2, 2008
   CHANGE 06/10 - REVISION CHANGE - CODE A - June 9, 2010

Obsolete Revision Information:
   1989 EDITION - TESTS FOR SAFETY-RELATED CONTR - Jan. 27, 1989