UL 1018:2017 pdf download

6.6.1.5 Solid-state protective controls that do not rely upon software as a protective component shallcomply with the:

a)Standard for Tests for Safety-Related Controls Employing Solid-State Devices, uL 991 or
b) Standard for Automatic Electrical Controls - Part 1: General Requirements, UL 60730-1except Clause H 11.12(Controls using software).

6.6.1.6 Protective controls that rely upon software as a protective component shall comply with the:

a) Standard for Tests for Safety-Related Controls Employing Solid-State Devices, UL 991, andthe Standard for Software in Programmable Components,UL 1998;or

b) Standard for Automatic Electrical Controls - Part 1: General Requirements, UL 60730-1.

6.6.1.7 An electronic，non-protective control that is simple in design need only be subjected to theapplicable requirements of this end-product standard. A control that does not include an integrated circuitor microprocessor, but does consist of a discrete switching device, capacitors, transistors, and resistors,is considered simple in design.See Abnormal Operation Test,Section 46.

6.6.2 Electromechanical and electronic controls

6.6.2.1 A control,other than as specified in 6.6.3-6.6.7, shall comply with the:

a)Standard for Solid-State Controls for Appliances,UL 244A;

b) Standard for Temperature-Indicating and -Regulating Equipment, UL 873;or

c) Standard for Automatic Electrical Controls - Part 1: General Requirements, UL 60730-1.
6.6.3 Liquid level controls.