TDK 1500W, 750W technical manual Noise and Impedance Effects, Inductive loads

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3.9.4Noise and Impedance Effects

To minimize the noise pickup or radiation, the load wires and remote sense wires should be twisted pairs to the shortest possible length. Shielding of sense leads may be necessary in high noise envi- ronments. Where shielding is used, connect the shield to the chassis via a rear panel Ground screw. Even if noise is not a concern, the load and remote sense wires should be twisted-pairs to reduce coupling, which might impact the stability of power supply. The sense leads should be separated from the power leads.

Twisting the load wires reduces the parasitic inductance of the cable, which could produce high fre- quency voltage spikes at the load and the output of the power supply, because of current variation in the load itself.

The impedance introduced between the power supply output and the load could make the ripple and noise at the load worse than the noise at the power supply rear panel output. Additional filtering with bypass capacitors at the load terminals may be required to bypass the high frequency load current.

3.9.5Inductive loads

Inductive loads can produce voltage spikes that may be harmful to the power supply. A diode should be connected across the output. The diode voltage and current rating should be greater than the power supply maximum output voltage and current rating. Connect the cathode to the positive output and the anode to the negative output of the power supply.

Where positive load transients such as back EMF from a motor may occur, connect a surge suppres- sor across the output to protect the power supply. The breakdown voltage rating of the suppressor must be approximately 10% higher than the maximum output voltage of the power supply.

WARNING

Hazardous voltages may exist at the outputs and the load connections when using a power supply with a rated output greater than 40V. To protect personnel against accidental contact with hazardous voltages, ensure that the load and its connections have no accessible live parts. Ensure that the load wiring insulation rating is greater than or equal to the maximum output voltage of the power supply.

CAUTION

Ensure that the load wiring mounting hardware does not short the output terminals. Heavy connecting cables must have some form of strain relief to prevent loosening the connections or bending the bus-bars.

3.9.6Making the load connections

6V to 60V Models

Refer to Fig.3-5 for connection of the load wires to the power supply bus-bars and to Fig.3-6 for mounting the bus-bars shield to the chassis.

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83-507-013 Rev. D

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Contents Genesystm 750W/1500W Page Page Genesys Manual Supplement Table of Contents Front and Rear Panel Controls and Connectors ………...……… Remote Analog PROGRAMMING……………………………………………… Isolated Analog Programming OPTION………………………………… Limitation of Warranty Warranty ServiceDisclaimer Trademark InformationSafety Instructions Environmental Conditions SICHERHEITS-INSTALLATIONS Anweisungen Anderungen and Bauteileersatz Sicherheits-und WarnsymboleUmweltbedingungen Features and options General InformationIntroduction General DescriptionMultiple output power system Control via the serial communication portAnalog voltage programming and monitoring Parallel operationAccessories Specifications ChapterVout Supplemental Characteristics Genesystm 750W & 1500W Power Supplies Outline Drawings Installation GeneralPreparation for USE Initial InspectionsAC Input Power Connection LOCATON, Mounting and CoolingAC Source Requirements Rack Mount Slides optionalAC Input Connector, 1500W models AC Input Connector, 750W modelsAC Input Wire Connection, 1500W models AC Input CordGeneral TURN-ON Checkout ProcedurePrior to Operation Constant Voltage Check Constant Current CheckOVP Check UVL CheckConnecting the Load Wire termination AWGInductive loads Noise and Impedance EffectsMaking the load connections 6V to 60V Models Wire terminal lug 2 places 80V to 600V ModelsLoad wires connection to the output connector Connecting single loads, remote sensing Connecting single loads, local sensing defaultConnecting multiple loads, radial distribution method Multiple load connection with distribution terminals Grounding outputsSense wiring Output Terminal GroundingLocal and Remote Sensing Local sensing10.4 J2 sense connector technical information Remote sensingFront and Rear Panel Controls and Connectors Front Panel Controls and IndicatorsAuxiliary Function Rear Panel Connections and Controls Rear panel connections and controlsRear Panel SW1 Setup Switch Resetting the SW1 switch 1 SW1 position functionRear Panel J1 Programming and Monitorng Connector Making J1 connectionsSignal EnainIfcom LocalConstant Current Mode Constant Voltage ModeLocal Operation Setting the OVP level Resetting the OVP circuitOver Voltage Protection OVP Automatic CrossoverOutput SHUT-OFF SO Control VIA Rear Panel J1 Connector Under Voltage Limit UVLFoldback Protection Output ON/OFF ControlCV/CC Signal ENABLE/DISABLE Control VIA Rear Panel J1 ConnectorPsok Signal Over Temperature Protecton OTP Last Setting MemoryAuto-restart mode Safe-start modeSeries Operation Series connection for increased output voltageSeries connection for positive and negative output voltage Series connection for positive/negative output voltagesParallel Operation Advanced parallel configuration Setting the units as Master or SlaveMaster and Slave units default operation Connection to the loadCurrent display accuracy To release units from Slave modeAST OFF *OUT OFF DAISY-CHAIN Connection Front Panel LockingUnlocked front panel Locked front panelRemote Analog Programming LOCAL/REMOTE Analog IndicationDown Remote voltage programming connectionResisitive Programming of Output Voltage and Current Limit Remote resistive programmingRemote Monitoring of Output Voltage and Current RS232 & RS485 Remote Control Configuration6 RS232/RS485 port in Local mode Rear Panel RS232/RS485 ConnectorFront panel in Remote mode MD Mode Option Factory Installed MD Mode Description MD Mode enable Serial communication modeMD Mode SRQ MD Mode SRQ RetransmissionConnecting Power Supplies to RS232 or RS485 BUS Single power supplyCommunication Interface Protocol Error Messages Command SET DescriptionID Control Commands Initialization Control CommandsOutput Control Commands DVC? FilterFILTER? OUT?Global Output Commands Single Byte Commands Enable MD Mode MD Mode Option RequiredDisable SRQ retransmission MD Mode Option Required Enable SRQ retransmission MD Mode Option RequiredAddressed commands with response Read registers Print Power On TimeTest if MD Mode is Installed Addressed commands without response Acknowledge SRQ1010 None Disable retransmission of SRQs by GEN750W models GEN1500W models Current programming range STATUS, Error and SRQ Registers 10.6 Status Control CommandsConditional Registers Status RegistersService Request Enable and Event Registers BITFault Enable Register Fault Event RegisterStatus Enable Register Status Event RegisterSerial Communication Test SET-UP Power supply set-upCommunication Test Specifications Isolated Analog Programming Option1 0-5V/0-10V Option PN IS510 PPM/CIsolated Programming & Monitoring Connector Setup and Operating Instructions Maintenance Fuse Rating OUP
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