About our company
HMD specializes in the research, development, and manufacturing of industrial automation control systems, with a focus on customized production of low- voltage control panels and PLC intelligent control cabinets. With our team of experienced electricians, CAD/EPLAN -certified designers, and PLC programming experts, we strictly adhere to quality management systems to provide customers with comprehensive one-stop services - from solution design and precision machining to system commissioning. Our products are widely used in smart buildings, industrial automation, energy management, and other fields.
We work through every aspect at the planning
FREQUENTLY ASKED QUESTIONS
Common certifications include:
CE (EU mandatory safety certification, covering EMC and LVD directives)
UL (For the U.S. market, e.g., UL508A for industrial control panels)
IEC 61439 (Global standard for low-voltage switchgear)
GB/T Standards (Common for Chinese domestic projects)
Other regional certifications (e.g., GOST for Russia, AS/NZS 3439 for Australia).
Solutions based on heat dissipation needs:
Natural cooling: Ventilation openings (must meet IP rating)
Forced air cooling: Fans (e.g., EBM brand)
Air conditioner/heat exchanger: Required for high-temperature environments (e.g., above 40°C).
Key measures include:
Sealing (e.g., silicone gaskets, waterproof cable glands)
Corrosion-resistant hinges/locks (stainless steel or galvanized materials)
Pre-shipment IP testing (e.g., water spray, dust resistance tests).
During the design phase, electrical components such as transformers, circuit breakers, and other devices should be selected according to the electrical standards of the target market (e.g., 230V/50Hz in Europe, 120V/60Hz in the United States). Additionally, voltage conversion modules or frequency converters should be configured to ensure stable operation of the equipment.
There are differences in programming languages and communication protocols among PLCs of different brands, so the programs are generally not interchangeable. If it is necessary to change the PLC brand, the program needs to be rewritten, and compatibility tests should be conducted.
Basic configurations include:
Main switch (Circuit breaker or isolator)
Protection devices (Fuses, surge protectors/SPDs)
Control components (Contactors, relays, PLCs)
HMI/indicators (Touchscreen, signal lamps)
Terminals and wiring ducts (Compliant with wiring standards).
Solutions based on heat dissipation needs:
Natural cooling: Ventilation openings (must meet IP rating)
Forced air cooling: Fans (e.g., EBM brand)
Air conditioner/heat exchanger: Required for high-temperature environments (e.g., above 40°C).
Standard warranty: 1year (subject to contract)
Exclusions:
Human damage or improper operation
Natural disasters (e.g., lightning, floods)
Unauthorized modifications.
Service process:
Remote diagnostics (via VPN/TeamViewer)
Solution within 48 hours (priority for critical cases)
Global repair network (specify export region in advance).
CONTACT US FOR ANY QUESTIONS
