EMI/EMC Standards IEC 61000-4-29

Standard: IEC 61000-4-29 (Electromagnetic compatibility (EMC) - Part 4-29) Title: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests. Related Standards: Often used in conjunction with generic immunity standards like IEC 61000-6-1 or product-specific standards for telecom and industrial equipment.

This standard is mandatory for a wide spectrum of equipment that relies on Direct Current (DC) power sources. If your device connects to a DC network, a battery system, or an external DC adapter, this testing applies.

• Telecommunication Equipment: Routers, switches, and base stations powered by -48V DC.
• Industrial Automation: PLCs, sensors, and controllers on 24V DC rails.
• Power Systems: DC-DC converters and battery management systems.
• Automotive Electronics: Sub-assemblies tested under specific stationary DC conditions.

Our testing process rigorously evaluates how your Equipment Under Test (EUT) behaves when the DC supply deviates from nominal values. The scope includes:

• Voltage Dips: Reducing the input voltage to 40% or 70% of the rated voltage for specific durations (e.g., 10ms to 1s).
• Short Interruptions: Simulating a complete power cut (0% voltage) to test system recovery or hold-up time.
• Voltage Variations: Testing the device's ability to handle gradual transitions between minimum and maximum voltage limits (e.g., 85% to 115% of rated voltage).
• Performance Criteria: We monitor for Performance Criteria A (continuous operation), B (temporary degradation with self-recovery), or C (intervention required).

To ensure your test reports are accepted globally (including for CE, FCC, and BIS compliance), testing is conducted in a laboratory operating under strict quality management systems.

ISO/IEC 17025 Accredited: Our partner labs hold NABL accreditation (ILAC/APLAC MRA signatory), ensuring that reports are valid across international borders.

We understand that time-to-market is critical.

• Standard Lead Time: 3 to 5 working days from the receipt of the sample and complete documentation.
• Expedited Services: Available upon request for urgent certification needs.

To facilitate a smooth testing process, please ensure the following items are submitted:

• Functional Sample: 1 fully operational unit of the Equipment Under Test (EUT).
• Accessories: All necessary mating connectors, DC cables, and specific loads if required.
• Operational Guide: Instructions to operate the device in its typical continuous mode.

Costs for IEC 61000-4-29 testing are calculated based on the complexity of the device and the number of operational modes requiring verification.

• Tailored Quote: Please contact our sales team with your product specifications for a precise estimate. We offer competitive pricing for bundled EMC testing packages.

For the final test report generation, the following documents are mandatory:

• User Manual / Instruction Sheet: Describing the intended use and specifications.
• Technical Specifications: Input voltage range (Min/Max) and current rating.
• Schematics: Block diagram and circuit diagram of the power input stage.
• General Info: ISO Certificate of the manufacturer (if available) and marking label details.