Modules Connect Modbus to ControlLogixModbus and Modbus Plus Communication Modules connect the networks to ControlLogix systems. The modules have independently configured Modbus ports that operate as master and/or slave with radio, modem, and multidrop support. Two active serial ports each support RS-232, RS-422 and RS-485. The modules offer true peer-to-peer communication with other Modbus Plus nodes.ProSoft Technology: 661-716-5100; www.prosoft-technology.com