Support

With over a thousand cooperative customers and 17 years of service experience, we can provide you with everything from model selection to technical support

Home Support FAQ

How to design the EMC of the fault alarm circuit of the intelligent low-voltage monitoring unit?

Time：2026-01-18 Views：510次

Share：

The fault alarm circuit's EMC design ensures reliable alarm performance while maintaining interference immunity. It employs a balance between fast action and filtering. The alarm output uses optocoupler isolation (TLP281) with an isolation voltage of 2500Vrms. Shielded twisted-pair cable is used for the output lines. On the PCB, the alarm circuit is kept away from other circuits. In terms of software, multiple confirmations of alarm conditions prevent false alarms. Through this design, the alarm action time is less than 100ms, and the immunity meets the IEC 61000-4-4 2kV EFT test requirements.

Previous：How can industrial servo systems be designed from the outset to avoid the need for later modifications?

Next：How to filter and shield the Ethernet of a frequency converter

Return

2026-02-09

Specific strategies for low-cost EMC optimization of intelligent low-voltage monitoring units are listed, including integrated components, PCB optimization, software filtering, and substitution of domestically produced components.

How to adapt the intelligent low-voltage monitoring unit to EMC in industrial low-voltage environments?

2026-02-09

This section describes the technical solution for adapting intelligent low-voltage monitoring units to EMC requirements in industrial low-voltage environments through rigorous interference protection, wideband filtering, and enhanced testing.

How can the initial design of intelligent low-voltage monitoring units avoid the need for later rectification?

2026-02-09

A technical strategy to avoid the need for later rectification of intelligent low-voltage monitoring units by incorporating EMC design throughout the entire process, including design review and simulation verification.

Surge Protective Device

Energy infrastructure

Patent Qualifications

Production Management

Organizational Structure

Benefits and Compensation

Search jobs

Contact Us

Consultation Hotline：

+86 18721669954

Contact Address：

4th Floor, Building 9, Shuimu Garden, Tus-Caohejing (Zhongshan) Science and Technology Park, No. 199, Guangfulin East Road, Songjiang District, Shanghai

Contact Email：

global@yint.com.cn

沪公网安备31011702889749号

Technical Support：: JijinWeb