What are the national standards for Human-Machine Delivery (HMI) EMC (Engineering, Manufacturing, and Control)?

For HMI products to be marketed in China, they must comply with a series of national electromagnetic compatibility standards. Most of these standards are equivalent to or modified versions of the international IEC/CISPR standards. The core standards mainly fall into two categories: emission standards and immunity standards. For emission standards, GB/T 9254 (information technology equipment) or GB 4824 (industrial, scientific, and medical equipment) are commonly used, corresponding to CISPR 22 and CISPR 11 respectively, specifying the limits for radiated and conducted emissions from the equipment. For immunity standards, the GB/T 17626 series is primarily used, which is equivalent to the IEC 61000-4 series.

Commonly used standards include: GB/T 17626.2 (Electrostatic Discharge Immunity), GB/T 17626.4 (Electrical Fast Transient/Burst Immunity), GB/T 17626.5 (Surge Immunity), GB/T 17626.3 (Radiated Electromagnetic Field Immunity), GB/T 17626.6 (Radiated Electromagnetic Field Immunity), and GB/T 17626.8 (Power Frequency Magnetic Field Immunity). The specific standards applicable depend on the HMI product classification, operating environment, and customer requirements. The standards and levels to be met should be clearly defined at the initial design stage, guiding EMC design and component selection. Audiotech's product manuals and application notes typically indicate the applicable standard levels, providing a reference for HMI design.