Danfoss FC 300 Operating Instructions Manual

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Contents

Danfoss FC 300 Operating Instructions Manual Manual pdf 23 page image

130BT310.101 2N OVLTBUS TER.OFF-ON A53 A54U- I U- IIllustration 2.18 Location of Terminals 53 and 54 Switches andBus Termination Switch2.4.5.8 Mechanical Brake ControlIn hoisting/lowering applications, it is necessary to be ableto control an electro-mechanical brake:• Control the brake using any relay output ordigital output (terminal 27 or 29).• Keep the output closed (voltage-free) as long asthe frequency converter is unable to ‘support’ themotor, for example due to the load being tooheavy.• Select [32] Mechanical brake control in parametergroup 5-4* Relays for applications with an electro-mechanical brake.• The brake is released when the motor currentexceeds the preset value in 2-20 Release BrakeCurrent.• The brake is engaged when the output frequencyis less than the frequency set in 2-21 ActivateBrake Speed [RPM] or 2-22 Activate Brake Speed[Hz], and only if the frequency converter carriesout a stop command.If the frequency converter is in alarm mode or in an over-voltage situation, the mechanical brake immediately cutsin.In the vertical movement, the key point is that the loadmust be held, stopped, controlled (raised, lowered) in asafe mode during the entire operation. Because thefrequency converter is not a safety device, the crane/liftdesigner (OEM) must decide on the type and number ofsafety devices (e.g. speed switch, emergency brakes etc.) tobe used, in order to be able to stop the load in case ofemergency or malfunction of the system, according torelevant national crane/lift regulations.L1 L2 L3U V W02 01A1A2130BA902.10Drive OutputrelayCommand Circuit220VacMechanicalBrakeShaftMotorFrewheelingdiodeBrake380VacOutputContactorInputPower CircuitIllustration 2.19 Connecting the Mechanical Brake to theFrequency Converter2.4.6 Serial CommunicationConnect RS-485 serial communication wiring to terminals(+)68 and (-)69.• Screened serial communication cable isrecommended• See 2.4.2 Earth (Grounding) Requirements forproper grounding616869+130BB489.10RS-485Illustration 2.20 Serial Communication Wiring DiagramInstallation VLT®AutomationDrive OperatingInstructionsMG33AM02 - VLT® is a registered Danfoss trademark 192 2