Item Type: USB to RS485 Converter_x000D_ Support Baud Rate Range: 75bps-115200bps_x000D_ Signal Reception Indicator: RX, LED_x000D_ Signal Transmission Indicator: TX, LED_x000D_ Driver: Use CH340 driver, compatible with CH340 driver_x000D_ A: RS485 signal positive_x000D_ B: RS485 signal negative_x000D_ GND: Common ground_x000D_ +5V: Positive 5V power output_x000D_ Compatible Operating Systems: _x000D_ For Windows 98SE_x000D_ For Windows ME_x000D_ For Windows 2000 SP4_x000D_ For Windows XP SP2 and above(32 and 64 bit)_x000D_ For Windows Server 2003 (32 and 64 bit)_x000D_ For Windows Server 2008/2008 R2 (32 and 64 bit)_x000D_ For Windows Vista (32 and 64 bit)_x000D_ For Windows 7 (32 and 64 bit)_x000D_ For Windows 8/8.1(32 and 64bit) 1WITH SIGNAL INDICATOR: With TVS transient suppression protection function to prevent the internal chip from being damaged due to level incompatibility, with receiving and sending lights, resistant to high pulse voltage protection function, and super convenient wiring method 2OVERVOLTAGE TRANSIENT PROTECTION: Lightning protection, electrostatic discharge protection, surge protection, overvoltage and other transient disturbances caused by power system switches, etc. For these transient disturbances, using protective circuits to protect, bypassing the harmful transient energy to ground 3115200BIT ERROR FREE TRANSFER: Completely designed in accordance with industrial grade standards, which has lightning resistant and static shock resistant, limited slope drive, effectively suppresses electromagnetic interference and solves the superposition of valid signals and invalid signals on the transmission circuit. Error free data transfer rate up to 115200bit 4EFFECTIVE SUPPRESSING EFFECT: On board TVS(transient voltage suppressor), effectively suppressing surge voltage and transient spike voltage in the circuit 5SUPPORT UP TO 32 TRANSCEIVERS: The receiver has 1/8 unit load input impedance, and up to 32 transceivers can be attached to the bus1 x USB to RS485 Converter