Hach SC4200c User Manual

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Hach SC4200c User Manual Manual pdf 21 page image

Figure 10 Connect the relaysTable 4 Wiring information—relaysTerminal Description Terminal Description1 Relay 1, NC 4 Relay 2, NC2 Relay 1, common 5 Relay 2, common3 Relay 1, NO 6 Relay 2, NONC = normally closed; NO = normally openInstall an expansion moduleW A R N I N GExplosion hazard. This manual is only for installation of the unit in a non-hazardous location. Forinstallation of the unit in hazardous locations, use only the instructions and approved control drawingprovided in the hazardous location installation manual.Expansion modules with analog outputs, analog inputs and Profibus communication are available forthe controller. Refer to the documentation supplied with the module for additional information.Modbus TCP/IPModbus TCP/IP is a standard for industrial communications. The Modbus TCP/IP protocol connectscomputers to measurement and control systems that use the TCP/IP protocol for data transmission.This type of data transmission is known as machine to machine (M2M) communication.The controller is factory configured to be integrated directly in programmable logic controller (PLC)systems. PLC systems record and process the controller measured data. The data analysis and theprocedures caused by the results are programmed in the PLC system.Use the ethernet connector for TCP/IP based fieldbus communications to connect the controller to aPLC system. Refer to Figure 6 on page 13. When the controller is configured to share the LAN, thecontroller cannot connect to Modbuts TCP/IP. Make sure to disable the internet sharing setting andconfigure the ethernet port to adapt the Modbus TPC slave IP address to the PLC IP subnetEnglish 19