ABB Relion 650 Series Installation Manual

Also see for RELION 650 SERIES: Technical manual Technical manual Commissioning manual Engineering manual Operation manual

Contents

c) Vim - the common mode voltage between any pair of RS485 chips may not exceed10 V.d) A physical earth connection between all RS485 circuits will reduce noise.2.3.2 Bus segment termination networkThe termination network below required at each end of each Bus Ph-segment.en03000112.vsdExV+Signal BSignal ADGNDRu = 390 ohm1/4 W, 2%Rt = 220 ohm1/4 W, 2%Rd = 390 ohm1/4 W, 2%ExV is supplied by the Node at end of the Bus SegmentIEC03000112 V1 EN-USFigure 30: RS-485 bus segment terminationExV is supplied by the Node at end of the Bus SegmentThe specifications of the components are:a) Ru + 5 V to Signal B = 390 W, 0.25 W ±2.5%b) Rt Signal B to Signal A = 220 W, 0.25 W ±2.5%c) Rd Signal A to GND = 390 W, 0.25 W ±2.5%2.3.3 Bus power distributionThe end node in each Ph-segment applies 5 V bus excitation power to the Terminationnetwork via the Excitation pair (ExV+ and GND) used in the Type 3 Physical layerspecification.6.3.3 Data on RS485 serial communication module cable SEMOD176342-280 v2Type: Twisted-pair S-STP (Screened – Screened Twisted Pair)Shield: Individual foil for each pair with overall copper braidLength: Maximum 1200 m (3000 ft) from one system earth to the next system earth (includeslength from platform point to system earth on both sides)Temp: According to applicationImpedance: 120 WCapacitance: Less than or equal to 42 pF/mExample: Belden 9841,Alpha wire 6412, 6413Section 6 1MRK 514 027-UEN DConnecting46 650 seriesInstallation manual© Copyright 2017 ABB. All rights reserved