Solar power generation and energy storage monitoring: Page 5 of 5

August 20, 2019 //By Richard Anslow and Martin Murnane
energy storage
New government policy combined with new regulation is driving renewable energy generation, and the solar market is expected to have strong growth in the future. Due to the current increase of power density in solar inverters and the demand for energy storage balancing, this generation of solar power leads to a need to significantly monitor all elements of a solar system.

iCoupler signal isolated RS-485 with additional EMC robustness

When designing an EMC communications interface, the circuit designer is often faced with a design and test iterative cycle. The circuit needs to be designed to meet system-level EMC standards and customer requirements. System-level IEC standards, such as IEC 61131-2 for industrial automation, specify varying levels of protection against IEC ESD, EFT, and surge, as well as immunity to radiated, conducted, and magnetic disturbances.

Analog Devices’ iCoupler signal isolated RS-485 includes additional certified EMC protection against these noted disturbances, reducing time to market for designs that need to meet strict regulatory targets. In particular, the ADM2795E RS-485 transceiver integrates isolation robustness and EMC protection, which saves significant printed circuit board (PCB) board space for the solar PV communication port interface.


Fig. 5: iCoupler isolated RS-485 transceiver with added
IEC 61000-4-5 surge robustness on the A and B bus pins.

The ADM2795E is a 5 kV rms signal isolated RS-485 transceiver that features up to ±42 V of ac-to-dc, peak bus overvoltage fault protection on the RS-485 bus pins. The device integrates Analog Devices iCoupler technology to combine a 3-channel isolator, RS-485 transceiver, and IEC electromagnetic compatibility (EMC) transient protection in a single package.

About the authors

Richard Anslow works on new product definitions and customer-facing roles related to Analog Devices’ isolated communications portfolio – www.analog.com

Martin Murnane is a solar PV systems engineer in the Industrial and Instrumentation segment, focusing on energy/solar PV applications at Analog Devices – www.analog.com

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