UL 61010-2-201:2018 PDF Download

The UL 61010-2-201:2018 standard is titled "Standard for Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use - Part 2-201: Particular Requirements for Control Equipment." This standard specifies safety requirements and related verification tests for control equipment and their associated peripherals used in industrial environments. The equipment included within the scope of this standard includes programmable logic controllers (PLCs), programmable automation controllers (PACs), distributed control systems (DCS), remote I/O, industrial PCs and panel PCs, programming and debugging tools, displays and human-machine interfaces (HMI), and positioners.

The standard covers components of the above-named equipment such as stand-alone power supplies, peripherals like digital and analog I/O, and industrial network equipment. It also addresses control equipment intended for use in overvoltage category II, III, and IV in low-voltage installations, with a rated equipment supply voltage not exceeding AC 1,000V or DC 1,000V.

However, the standard excludes aspects of the overall automated system, such as complete assembly lines. It states that control equipment, their application program, and associated peripherals are considered components of an overall automated system, and safety considerations for the complete system installation and application are beyond the scope of this standard. Electrical installation and guidelines should be referenced from the IEC 60364 series of standards or applicable national/local regulations.

The objective of this standard is to ensure that hazards to operators, service personnel, and the surrounding area are reduced to a tolerable level. The standard addresses various hazards such as electric shock or burn, mechanical hazards, spread of fire, excessive temperature, effects of fluids and fluid pressure, effects of radiation, liberated gases, explosion and implosion, hazards arising from reasonably foreseeable misuse and ergonomic factors, and risk assessment for hazards or environments not fully covered.

Certain aspects are specifically excluded from the scope of this standard, such as reliability, functionality, performance, or other properties of the control equipment not related to safety, mechanical or climatic requirements for operation, transport or storage, EMC requirements, protective measures for explosive atmospheres, and functional safety.