25: DATA LINK COMMUNICATION25-2 « FC4A MICRO SMART USER ’S MANUAL »Data Link System SetupTo set up a data link system, install the RS485 communication adapter (FC4A-PC3) to the port 2 connector on the all-in-one 16- or 24-I/O type CPU module.When using the slim type CPU module, mount the RS485 communication module (FC4A-HPC3) next to the CPU module.When using the optional HMI module with the slim type CPU module (not shown below), install the RS485 communica-tion adapter (FC4A-PC3) to the port 2 connector on the HMI base module.Connect the RS485 terminals A, B, and SG on every CPU module using a shielded twisted pair cable as shown below. Thetotal length of the cable for the data link system can be extended up to 200 meters (656 feet).A B SGCable CableA B SGMaster Station Slave Station 1Slave Station 2Slave Station 31RS485 CommunicationAdapter FC4A-PC3on Port 2 ConnectorRS485 CommunicationModule FC4A-HPC3Port 2All-in-One TypeCPU ModuleSlim TypeCPU ModuleShielded twisted pair cable 200 meters (656 feet) maximumCore wire 0.3mm2
