MODBUS GATEWAYS EKI-1220 series Modbus Gateways are designed for quick and easy integration of Modbus serial devices with Industrial Ethernet networks. Available in two configurations, the EKI-1221 and EKI-1222 feature one or two RS232/422/485 serial ports, with redundant 10/100 Mbps Ethernet connections, for transparently connecting Modbus ASCII/RTU and Modbus/TCP devices and equipment.