Danfoss VLT AQUA Drive FC 202 Design Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

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Danfoss VLT AQUA Drive FC 202 Design Manual Manual pdf 162 page image

10.4 Control Wiring and TerminalsControl cables must be shielded and the shield must be connected with a cable clamp at both ends to the metal cabinet ofthe unit.For correct grounding of control cables, see Figure 10.4.DriveGrounde30bu003.10100 nF6968616869PLC etc.PLC etc.PLC etc.PLC etc.Equalizing cableMinimum 16 mm212345DriveGroundDriveGroundDriveGroundDriveGroundGroundGroundGround GroundGroundGroundDrive 1 Control cables and serial communication cables must befitted with cable clamps at both ends to ensure the bestpossible electrical contact.2 Do not use twisted cable ends (pigtails). They increase theshield impedance at high frequencies.3 If the ground potential between the drive and the PLC isdifferent, electric noise can occur that disturbs the entiresystem. Fit an equalizing cable next to the control cable.Minimum cable cross-section: 16 mm2 (6 AWG).4 If long control cables are used, 50/60 Hz ground loops arepossible. Connect 1 end of the shield to ground via a 100nF capacitor (keeping leads short).5 When using cables for serial communication, eliminatelow-frequency noise currents between 2 drives byconnecting 1 end of the shield to terminal 61. Thisterminal is connected to ground via an internal RC link.Use twisted-pair cables for reducing the differential modeinterference between the conductors.Figure 10.4 Grounding Examples10.4.1 Control Cable RoutingTie down and route all control wires as shown inFigure 10.5. Remember to connect the shields in a properway to ensure optimum electrical immunity.• Isolate control wiring from high-power cables.• When the drive is connected to a thermistor,ensure that the thermistor control wiring isshielded and reinforced/double insulated. A24 V DC supply voltage is recommended.Fieldbus connectionConnections are made to the relevant options on thecontrol card. See the relevant fieldbus instruction. Thecable must be tied down and routed along with othercontrol wires inside the unit. See Figure 10.5.Electrical Installation Con... VLT® AQUA Drive FC 202160 Danfoss A/S © 01/2018 All rights reserved. MG22B2221010