The EVAL-CN0313-SDPZ is an EMC compliant RS485 transceiver protection circuit evaluation board. It demonstrate proven and tested electromagnetic compatibility (EMC) compliant solutions for three protection levels for popular RS485 communication ports using the ADM3485E RS485 transceiver. Each solution was tested and characterized to ensure that the dynamic interaction between the transceiver and the protection circuit components functions correctly together to protect against the electrostatic discharge (ESD), electrical fast transients (EFT) and surge immunity specified in IEC 61000-4-2, IEC 61000-4-4 and IEC 61000-4-5, respectively. The circuits offer proven protection for RS485 interfaces using the ADM3485E to the ESD, EFT and surge levels often encountered in harsh environments. There are three ADM3485E devices on the board, one for each protection scheme. Each protection scheme provides ESD and EFT protection as described and increasing levels of surge protection.
- Robust EMC compliant RS485 transceiver interface
- Tested to specific ESD, EFT and surge levels
- Low power shutdown current
- TIA/EIA RS485/RS422 compliant
- Half duplex transceiver
- Receiver open circuit, fail safe design
- Thermal shutdown and short circuit protection
- Outputs high Z when disabled or powered off
- Up to 32 nodes on the bus
- ±15KV ESD protection on RS485 input/output pins
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