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Setting new benchmarks for industrial Ethernet reliability

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Moxa Inc . announces the EDS E series of next generation industrial Ethernet switches specifically designed to address reliability concerns in harsh environments.

Many mission-critical applications in industrial automation require highly-available network transmissions to provide real-time monitoring and control, prevent production losses from system downtime, and ensure onsite personnel safety. However, many factors commonly found in industrial environments, such as electro-magnetic interference and noise, severe shock and vibration, and high temperature variations can quickly compromise system reliability. 

Industrial Ethernet switch robustness is therefore a critical factor to achieve highly reliable networks.

IEEE 1613 compliance provides Level 4 EMS protection and is needed to resist electro-magnetic interference in power substations. However, high levels of noise interference are not only found in power distribution networks, but can also exist in railway wayside networks and even on factory floors. Suitable for power substation applications, IEEE 1613-compliant switches can offer any industrial network a higher level of reliability and lower total cost of ownership.

Moxa’s next generation EDS E series industrial Ethernet switches are engineered to offer a higher level of protection than typical industrial switches to provide seamless data transmission of mission-critical applications in various harsh environments. To deliver ultra-robust performance, the EDS E series switches not only meet Level 4 EMS standards with laboratory-proven immunity to electromagnetic interference, they are also compliant with railway standards for vibration and resistant to highly unstable industrial environments. 

The aluminium thermal fin panels are meticulously designed using simulation tests to optimise air flow and heat dissipation, which can significantly reduce internal component temperatures to enhance system reliability.

EMS Level 4 Protection

The new EDS switch is compliant with Level 4 EMS standards and has passed ESD, EFT, and surge tests to provide better protection during electromagnetic interference.

Electrostatic Discharge Immunity

The new EDS switch is able to maintain normal operation even at ±8 kV contact discharges or ±15 kV air discharges. With Level 4 ESD protection, the new EDS switch is unaffected by repetitive contact discharges.

EFT/Surge Immunity

Bursts of electrical fast transients are caused by operation of motors and electro-mechanical switches, damaging internal circuitry. Voltage surge may destroy electronic hardware through a lightning strike or power outage recovery. When EN 61000-4-4 and IEC 61000-4-5 standards were applied to conduct both EFT and surge tests separately, EFT/surge injections did not affect the performance of the switch with Level 4 EFT protection, keeping substation applications running uninterrupted.

Anti Vibration and Shock Resistant Test

The new EDS switch was subjected to 5 ~ 150 Hz random vibrations. The half-sine duration was 30 minutes and peak acceleration was X/Y/Z Axis at 5 g (50 m/s²) for the shock test. With the newly designed DIN rail kit, the EDS E series switch successfully resists high levels of shock and vibration, and allows easy switch installation.

Optimised Thermal Design Simulation

Another factor that affects device reliability is heat. In the numerical simulation of thermal dissipation, the new EDS switch expels heat across both side panels of thermal convection fins. In a burn-in room with 75°C ambient temperature, hot spots on both the switch surface and inside the switch were much lower when the switch was equipped with the outer thermal panels than when it was open to the air without the panels.

A series of stringent tests including Level 4 EMS, shock, vibration, and thermal fin dissipation has proven the design of next generation EDS E series switches to be extremely reliable and highly robust industrial Ethernet solutions for mission-critical applications in rigorous environments.

The EDS E series delivers ultra-robust performance with up to 16 Gigabit Ethernet ports of copper and SFP fibre slot combinations for high-speed data transmission, Level 4 EMS protection against electromagnetic interference, and over 700,000 hours MTBF for utmost network reliability. The EDS E series also has many user-centric features that enhance versatility and productivity.

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