ABB RMBA-01 User Manual
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Contents
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Chapter 3 – Installation3-2 RMBA-01 User’s manualWiring See the Hardware Manual of the drive for cable routinginformation.Arrange the bus cables as far away from the motorcables as possible. Avoid parallel runs. Use bushings atcable entries.The terminal block (X1) on the RMBA-01 is of thedetachable type for easy connection.The Modbus cable shield may be directly earthed atone node only. At other nodes, the cable shield shouldbe earthed via an RC circuit.TerminaldesignationsFigure 3-1 RMBA-01 terminal designationsX1 Marking Description1 A Data negative (Conductor 1 in twisted pair).2 B Data positive (Conductor 2 in twisted pair).3 DGData ground (Conductor 3 in a three-wiresystem). Used in a three-wire system as acommon reference potential for all devices onthe bus. Three-wire connection is highlyrecommended as it improves noise immunity.See the wiring diagrams below.4 SHLD Modbus cable shield AC earthing (via an RCcircuit to the frame).X1Bus termination switch (S1)1 2 3 4Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com |
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