BLM/1 is an USB to RS485 converter/adapter/bridge able to run in Half-duplex at a maximum speed of 115200 baud. Auto data direction feature (NO JUMPERS OR SWITCHES!). No power supply required, power is directly taken from the USB port. BLM/1 is the perfect product to interface any kind of industrial device (PLC/RTU/Data Loggers) with a regular PC. Looking for an easy RS485 interface for your PC? You found it!