Handbook - Eurotherm Ltda

T820 HANDBOOK2.5 CONNECTIONS AND WIRINGIf assembling the system yourself, refer to the LIN/ALIN Installation & User Guide (Part no. HA082429U005), theELIN User Guide (Part no. HA082429) for advice on LIN connections and wiring and the Communications Manual(Part no. HA028014) for advice on Modbus connections and wiring.Figure 2.5a and Figure 2.5b below, show a simplified overall connection diagram for an RS485 Serial or an Ethernetcontrol system using an Ethernet hub/switch.Category 5 cables may be used for individual line lengths of up to 100 metres. For line lengths greater than this, oneor more pairs of hubs with fibre-optic connections is recommended.T820I/O SubsystemTo/From ProcessFigure 2.5a Typical RS485 Serial connection diagramT820Network Switch(Rapid SpanningTree Protocol(RSTP))PC -Duplex connection(operating Configuration Tools)PC -Duplex connection(operating Configuration Tools)Network Switch(Rapid SpanningTree Protocol(RSTP))I/O SubsystemTo/From ProcessI/O SubsystemI/O Subsystems -Ethernet connectionsTo/From ProcessI/O SubsystemTo/From ProcessFigure 2.5b Typical Ethernet connection diagramChapter 2Page 2 - 8HA029131Issue 3 Feb 08