en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro
en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro
en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro
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55Before op<strong>en</strong>ing a contactor (DTC control mode selected)Stop the drive and wait for the motor to stop before op<strong>en</strong>ing a contactor betwe<strong>en</strong> theoutput of the drive and the motor wh<strong>en</strong> the DTC control mode is selected. See theappropriate <strong>ACS800</strong> Control Program Firmware Manual for the required parametersettings. Otherwise, the contactor will be damaged. In scalar control, the contactorcan be op<strong>en</strong>ed with the drive running.Protecting the relay output contacts and att<strong>en</strong>uating disturbances in caseof inductive loadsInductive loads (relays, contactors, motors) cause voltage transi<strong>en</strong>ts wh<strong>en</strong> switchedoff.The relay contacts on the RMIO board are protected with varistors (250 V) againstovervoltage peaks. In spite of this, it is highly recomm<strong>en</strong>ded to equip inductive loadswith noise att<strong>en</strong>uating circuits [varistors, RC filters (AC) or diodes (DC)] in order tominimize the EMC emission at switch-off. If not suppressed, the disturbances mayconnect capacitively or inductively to other conductors in the control cable and forma risk of malfunction in other parts of the system.Install the protective compon<strong>en</strong>t as close to the inductive load as possible. Do notinstall protective compon<strong>en</strong>ts at the RMIO board terminal block.230 V AC230 V AC24 VD CVaristorRC filterDiodeRelay outputsX251 RO12 RO13 RO1X261 RO22 RO23 RO2X271 RO32 RO33 RO3RMIOPlanning the electrical installation