Isolated RS485 RS232 Expansion HAT for . Based on 40pin GPIO interface, suitable for series motherboards. Using SC16IS752 and SP3485, SP3232 multi-chip combination scheme, can realize SPI to RS485, RS232, the communication rate is up to 921600bps. Support RS485 and RS232.RS232: full-duplex communication, SP3232 transceiver; RS485: semi/full-automatic communication, SP3485 transceiver. RS485 supports manual or automatic sending and receiving of data, which can be set by DIP switch. RS485 onboard resettable fuse and protection diode can stable output of current and voltage, prevent overcurrent and overvoltage, and shock resistance. Onboard (transient voltage suppression tube), which can effectively suppress the surge voltage and transient voltage in the circuit, and protect against static electricity. Onboard power supply and serial port transceiver indicators, easy to check the module power supply and communication status Breakout SPI control pins, for connecting with for and other control boards. Product RS485 RS232 HAT is an isolated RS485 and RS232 expansion board specially designed by for . It adopts SC16IS752+SP3485, SP3232 scheme, built-in power isolation, magnetic coupling isolation and and other protection circuits. UART expansion chip: SC16IS752. Communication Interface: SPI. RS485 transceiver: SP3485. RS232 transceiver: SP3232. data rate: Up to 921600bps. Operating Voltage: 5V. Mounting hole size:3.0mm. Dimensions : 65mm x 56.5mm : PCB colour: blue Package Contents: 1 x RS485 RS232 HAT 1 x 2X20PIN header 1 pack x Standoffs(2pcs) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.