Advantech Industrial Automation's EKI-1221D and EKI-1222D Gateways

EKI-1221D and EKI-1222D gateways provide transparent connectivity between Modbus (ASCII, RTU) serial devices and Ethernet-based Modbus TCP equipment. They have built-in Ethernet switches for cascading/daisy-chain connectivity and support Ethernet auto-bypass to prevent accidental power failure if one of the Modbus gateways unexpectedly shuts down. They come with Windows utilities and web-based configuration.