En 61326-1 Pdf =link= -

Electromagnetic Emissions (Interference caused by the device)

The standard covers all ports: AC mains, DC power, signal I/O, communication, and even enclosure ports. Many manufacturers only test mains and signal ports, forgetting control bus ports (e.g., RS-485, USB, Ethernet).

Decide if your product belongs in a Basic, Industrial, or Controlled environment.

Include:

If your product passed immunity testing under the 2013 version, it will likely fail under the 2021 version due to doubled test levels. You must re-test.

Emissions testing ensures the device does not disrupt radio communications, power grids, or nearby electronics.

Measures the RF energy the device sends back into the AC/DC power lines. en 61326-1 pdf

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Tests the device's resilience against static electricity from human touch or proximity. Include: If your product passed immunity testing under

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Normal performance within specification limits during and after the test. No degradation of function or data loss is allowed.

Evaluates how the device handles brownouts or brief power losses. Performance Criteria for Immunity Tests Measures the RF energy the device sends back

The standard applies to equipment operating from a supply or battery of less than or from the circuit being measured. It is generally considered that this product family standard takes precedence over generic EMC standards.

EN 61326-1 is a harmonized European standard that defines EMC emission and immunity requirements for electrical equipment operating from a supply or battery of less than 1000 V AC or 1500 V DC. The standard specifically covers equipment intended for: