Plug and Play Communication Module USB to RS485/RS232 Bidirectional Half Duplex Serial Port Features: 1. Supports USB to RS485/RS232 communication (switched through a toggle switch). 2. Adopting the CH343G chip, plug and play, compatible with Windows series, MacOS series, Linux and other systems. 3. On board TVS (transient voltage suppression tube) can effectively suppress surge voltage and peak voltage in the circuit, and prevent lightning and static electricity. 4. The board is equipped with self recovery fuses and protective diodes, which can ensure stable output of current and voltage, prevent overcurrent and overvoltage, and improve impact resistance. 5. Three LED indicator lights on board for easy viewing of power signal transmission and reception status. Parameters: Product type: Industrial grade USB to RS485/232 converter Communication speed: 50bps~1000000bps Host interface: USB Device interface: RS485/RS232 (switched by dial switch) USB interface: Working level: 5V Interface form: USB-A type interface Interface protection: 200MA recovery fuse, ESD static protection Transmission distance: approximately 5 meters RS485/RS232 interface: Interface form: wiring terminals Interface pins: GND, A+(TXD), B - (RXD) Direction control: Hardware automatically determines and controls the direction of data transmission Interface protection: Provides 600W lightning protection, surge and 15KV static electricity protection (onboard 120R balanced resistor) Transmission distance: RS485 (approximately 1200 meters), RS232 (approximately 10 meters) under low speed conditions Transmission mode: point-to-point (up to 32 nodes, with a maximum of 16 nodes. It is recommended to add a repeater RS232 (only one device can be connected to a point-to-point interface, and if multiple nodes need to be connected, a repeater should be added) Indicator lights: PWR: Power indicator light, connected to USB, lights up when voltage is detected TXD: Send indicator light, light up when data is sent from USB port RXD: Receive indicator Jie, light up when USB interface receives data USB to RS485/RS232 interface description: GND: Peripheral Connection GND A+TXD: RS485 connected to A, RS232 connected to RXD B-RXD: RS485 to B, RS232 to TXD Package includes: 1*Converter Module