Features: 1Safety Isolation: Strong current devices, such as inverters connected to the computer may burn USB, our TTL output module can isolate the computer USB port, the motherboard and safety, can effectively prevent the USB port damage, resulting in human injury. 2Optocoupler Isolation: This TTL output module has serial port TTL level optocoupler isolation with fast speed up to 256000bps and high reliability. 3On Board Chip and Module: On board stable CH340T USB to serial chip, on board 500mA self recovery fuse and 5V isolated power module for protecting the computer from damage. 4Prevent Interference: Strong interference electrical equipment such as drivers, inverters can generate interference leading to computer failure, this isolated output module can isolate the USB interface for communication to prevent interference with the computer. 5Sensitive Equipment Transmission: The computer itself is also a source of noise, by isolating the USB port, it can prevent high frequency interference from the computer from being transmitted to sensitive equipment for better data acquisition, such as measurement equipment and other equipment. Package included: 1 x TTL&nbspOutput&nbspModule