Mikroe SPI Extend Click is used for applications that require extending the SPI communication bus over a long distance. The board features the Analog Devices LTC4332 SPI Slave Extender device. The LTC4332 can transmit SPI data using a ±60V fault protected differential transceiver. It includes an interrupt signal, up to 2MHz over two twisted-pair cables. The extended common-mode range and high common-mode rejection on the differential link provide tolerance to large ground differences between nodes. The board can also provide a control interface using a separate slave select for configuration and fault monitoring.