B&B Electronics Zlinx 485 manual RS-422/485 Four-Wire Mode, RS-422/485 Two-Wire Mode

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Hardware

Figure 8. Zlinx 485 Base Module RS-422/485 Connector

RS-422/485 Four-Wire Mode

When the Zlinx Base module is configured to operate in RS-422/485 four-wire mode the receive terminals are connected to the transmit terminals of the Modbus device it is communicating with. Its transmit terminals are connected to the receive terminals of the Modbus device it is communicating with.

Figure 9. RS-422/485 Four-Wire Connection

RS-422/485 Two-Wire Mode

When the Zlinx Base module is configured to operate in RS-485 two-wire mode (RS- 422/485 switch in the right position) the two-wire RS-485 two-wire communications cable pair is connected to Terminals TDB and TDA. The communications cable ground/shield is connected to GND.

Manual Documentation Number: Zlinx485m-1808 www.bb-elec.comwww.bb-europe.com

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Contents Zlinx Zlinx International HeadquartersTable of Contents Introduction About this ManualSupport Zlinx Product Family Features Package ChecklistHardware Zlinx 485 ModulesBase Modules Expansion ModulesProgramming the Base Module using the RS232 connector Base and Expansion Modules Connected Together Indicators, Connectors and Accessories LED Indicators Connectors Power Supply Connector RS-422/485 Connector Local Bus Connector LocationRS-422/485 Four-Wire Mode RS-422/485 Two-Wire ModePower Supply Requirements RS-232 ConnectionTypes and Characteristics Digital InputsDI Wiring Digital OutputsAnalog Inputs Analog OutputsDo Wiring AI Wiring RTD Wiring Relay Wiring Type Modbus Memory Address Peer-to-Peer Mode Modbus ModeZlinx 485 Modes of Operation Connecting the Hardware Zlinx Base Module 2 wire RS-485 Connections Zlinx 485 Installation Getting StartedConnecting Zlinx 485 to a PC If the device is found, the Zlinx 485 Manager window opens Information Tab Zlinx 485 ManagerConfiguration Tab Input/Output TabConfiguration & Operation Configuring ZlinxTesting Modbus Mode Operation Peer-to-Peer Mode Settings Peer-to-Peer Master ConfigurationInput/Output Settings Digital Input Configuration Analog Input Configuration Saving the Configuration Firmware Updater Caution Dialog Box Updating Zlinx 485 FirmwareModbus Basics Modbus Help Modbus ASCII/RTU BasicsHints and Tips Appendix a Product Specifications Frequency Input Accuracy @ 25ºC Appendix B Dimensional Diagrams Dimensional Diagram of a Zlinx 485 Base ModuleAppendix C Serial Connections RS-232 PinoutsRS-422/485 4 Wire Pinouts Serial Connections Appendix D Modbus I/O Assignments Discrete Digital OutputsModbus I/O Assignments Modbus I/O Assignments Appendix E Zlinx 485 Models and Features Zlinx 485 Base Modules Model Number Module TypeAppendix F Zlinx 485 Troubleshooting Problem CausesAppendix G Terms and Definitions Term Definition