Rievtech HMI Panels | Communication Networking COMMUNICABLE SIMULTANEOUSLY WITH PLC, BARCODE READER, VFD, TEMPERATURE CONTROLLER The Rievtech HMI is able to communicate with many different types of hardware using high-speed RS232/422/485 communication ports and Ethernet 10 Base T/100 Base-TX communications. In addition, the HMI features a USB port for fast downloads of configuration files and access to trending and data logging. 9