UL 991-1989
Tests for safety-related controls employing solid-state devices

Standard No.

UL 991-1989

Release Date

1989

Published By

Underwriters Laboratories (UL)

Status

Withdraw

Replace By

UL 991-1995

Latest

UL 991-2010

UL 991-1989 history

• 1970 UL 991-2010
• 2007 UL 991 CRD-2007 UL Standard for Safety Tests for Safety-Related Controls Employing Solid-State Devices - Section/Paragraph Reference: Section 18 (Edition 3: October 22, 2004)
• 2004 UL 991-2004 UL Standard for Safety Tests for Safety-Related Controls Employing Solid-State Devices Third Edition; Reprint with revisions through and including April 2, 2008
• 2000 UL 991 BULLETIN-2000 UL Standard for Safety Tests for Safety-Related Controls Employing Solid-State Devices
• 1995 UL 991-1995 Tests for safety-related controls employing solid-state devices
• 1989 UL 991-1989 Tests for safety-related controls employing solid-state devices