BL20 Economy gateways for EtherNet/IP and Modbus TCP for distributed I/O have an integrated Ethernet switch that allows a line topology between multiple gateways without using an external switch, eliminating the need for additional cable runs to the PLC. BL20 gateways accommodate up to 32 I/O modules and are available with an integrated power supply, eliminating the need for an additional power module to feed the I/O bus.