Vacon NX series User Manual
Also see for NX series: User manualApplications manualMaintenance manualOperating guideApplications manual
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Contents
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Installation vacon • 75Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/55.4 Control unit5.4.1 Control unit componentsThe control unit of the VACON ® NX Active Front End contains the control board and additionalboards (see the figure below) connected to the 5 slot connectors (A to E) of the control board. Thecontrol board is connected to the power unit through a Dconnector or fibre optic cables.Figure 46. Basic and option board connections on the control boardWhen you receive the VACON® NX Active Front End, the control unit contains the standard controlinterface. If you included special options in your order, the VACON ® NX Active Front End is as in yourorder. On the next pages, you can find information on the terminals and general wiring examples.The type code shows the I/O boards that are installed at the factory. For more information on theoption boards, see VACON ® NX I/O Boards User manual.For instructions on how to install the control unit that is not attached to the power unit, see VACON®NXP IP00 Drives Installation Manual.5.4.2 Control voltage (+24V/EXT +24V)It is possible to use the drive with an external power source with these properties: +24 VDC ±10%,minimum 1000 mA. You can use it to externally power-up the control board, and the basic andexpander boards.Connect the external power source to one of the 2 bidirectional terminals (#6 or #12), see Figure 48.With this voltage, the control unit stays on and you can set the parameters. The measurements ofthe main circuit (for example, the DC link voltage, and the unit temperature) are not available whenthe drive is not connected to mains.NOTE! If you supply the AC drive with external 24 V DC power, you must use a diode in terminal #6(or #12) to prevent the current to flow in opposite direction. Put a 1 A fuse in 24 V DC line for eachAC drive. The maximum current consumption of each drive is 1 A from the external power supply.ABCDE |
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