TDK 750W HALF RACK Over Voltage Protection OVP, Automatic Crossover, Setting the OVP level

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-Enabled output, power supply in Constant Voltage mode: Press the PREV button and then rotate the CURRENT encoder knob. The CURRENT meter will show the pro- grammed Output Current for 5 seconds after the adjustment has been completed, and then will return to show the actual load current.

-Enabled output, power supply in Constant Current mode: Rotate the CURRENT encoder knob to adjust the Output Current.

4.Adjustment resolution can be set to Coarse or Fine adjustment. Press the FINE button to se- lect between the Coarse and Fine resolution. The FINE LED turns On when the resolution is set to FINE.

5.2.3 Automatic Crossover

If the power supply operates in Constant Voltage mode, while the load current is increased to greater than the current limit setting, the power supply will automatically switch to Constant Cur- rent mode. If the load is decreased to less than the current limit setting, the power supply will automatically switch back to Constant Voltage mode.

5.3 OVER VOLTAGE PROTECTION (OVP)

The OVP circuit protects the load in the event of a remote or local programming error or a power supply failure. The protection circuit monitors the voltage at the power supply sense points and thus provides the protection level at the load. Upon detection of an Over Voltage condition, the power supply output will shut down.

5.3.1Setting the OVP level

The OVP can be set when the power supply output is Enabled (On) or Disabled (Off). To set the OVP level, press the OVP/UVL button, so that the CURRENT meter shows “OUP”. The VOLTAGE meter shows the OVP setting level. Rotate the VOLTAGE encoder knob to adjust the OVP level. The display will show “OUP” and the setting value for 5 seconds after the adjustment has been completed, and then will return to its previous state.

The minimum setting level is approximately 105% of the set Output Voltage, or the value in Table 7-6, whichever is higher. The maximum setting level is shown in Table 5-1.

To preview the OVP setting, press the OVP/UVL pushbutton so that the CURRENT display will show “OUP”. At this time, the VOLTAGE display will show the OVP setting. After 5 seconds, the display will re-

Model

Max.

 

OVP

6V

7.5V

8V

10.0V

12.5V

15.0V

20V

24.0V

30V

36.0V

40V

44.0V

Model

Max.

 

OVP

60V

66.0V

80V

88.0V

100V

110.0V

150V

165.0V

300V

330.0V

600V

660.0V

turn to its previous state.

5.3.2Activated OVP protection indications

Table 5-1: Maximum OVP setting levels

When the OVP is activated the power supply output shuts down. The VOLTAGE display shows “OUP” and the ALARM LED blinks.

5.3.3Resetting the OVP circuit

To reset the OVP circuit after it activates:

1.Reduce the power supply Output Voltage setting below the OVP set level.

2.Ensure that the load and the sense wiring are connected properly.

3.There are four methods to reset the OVP circuit.

a)Press the OUT button.

b)Turn the power supply Off using the AC On/Off switch, wait until the front panel display turns Off, then turn the power supply On using the AC On/Off switch.

c)Turn the power supply output Off and then On using the SO control (refer to Section 5.7). In this method the power supply should be set to Auto-Restart mode.

d)Send an OUT 1command via the RS232/RS485 communication port.

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83-507-5002 Rev. B

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Contents Genesystm 750W Half Rack Page Page Genesys Manual Supplement Table of Contents Front and Rear Panel Controls and CONNECTORS………... ……… ……… Isolated Analog Progamming Option ……………………………..…… Warranty Safety Instructions Safety Instructions SICHERHEITS-INSTALLATIONS Anweisungen Anderungen and Bauteileersatz Sicherheits-und WarnsymboleUmweltbedingungen General Description Features and optionsGeneral Information IntroductionParallel operation Multiple output power systemControl via the serial communication port Analog voltage programming and monitoringAccessories Chapter SpecificationsFront Panel Supplemental Characteristics Genesystm Genh 750W Power Supplies Outline Drawings Initial Inspections InstallationGeneral Preparation for USERack Mounting Single unit installationGENH/RM Rack Mounting outline drawings AC Input Power ConnectionLOCATION, Mounting and Cooling AC Source RequirementsGeneral TURN-ON Checkout ProcedureAC Input Connector AC Input CordUVL Check Constant Voltage CheckConstant Current Check OVP CheckConnecting the Load AWG Wire termination6V to 60V Models Noise and Impedance EffectsInductive loads Making the load connectionsBus-bars shield mounting 80V to 600V Models 83-507-5002 Rev. B Connecting single loads, remote sensing Connecting single loads, local sensing defaultConnecting multiple loads, radial distribution method Grounding outputs Multiple load connection with distribution terminalsLocal sensing Sense wiringOutput Terminal Grounding Local and Remote SensingRemote sensing 10.4 J2 sense connector technical informationFront Panel Controls and Indicators Front and Rear Panel Controls and ConnectorsVoltage Auxiliary Function Rear panel connections and controls Number Description Rear Panel Connections and Controls1 SW1 position function Rear Panel SW1 Setup SwitchResetting the SW1 switch Rear Panel J1 Programming and Monitoring ConnectorMaking J1 connections 83-507-5002 Rev. B Local SignalEnain IfcomStandard Operation Constant Voltage ModeConstant Current Mode Local OperationAutomatic Crossover Setting the OVP levelResetting the OVP circuit Over Voltage Protection OVPOutput ON/OFF Control Output SHUT-OFF SO Control VIA Rear Panel J1 ConnectorUnder Voltage Limit UVL Foldback ProtectionCV/CC Signal ENABLE/DISABLE Control VIA Rear Panel J1 ConnectorSAFE-START and AUTO-RESTART Modes Psok SignalOver Temperature Protecton OTP Last Setting MemorySeries connection for increased output voltage Series OperationSeries connection for positive/negative output voltages Series connection for positive and negative output voltageBasic parallel operation Setting up the Master unitSetting up the Slave units Parallel OperationSetting the units as Master or Slave Setting Over Voltage protectionSetting Foldback protection Advanced parallel configurationAST OFF OUT OFF Master and Slave units default operationTo release units from Slave mode Current display accuracyFront Panel Locking DAISY-CHAIN ConnectionLocked front panel Unlocked front panelLOCAL/REMOTE Analog Indication Remote Analog ProgrammingRemote voltage programming connection DownRemote resistive programming Resisitive Programming of Output Voltage and Current LimitRemote Monitoring of Output Voltage and Current Configuration RS232 & RS485 Remote Control6 RS232/RS485 port in Local mode Rear Panel RS232/RS485 ConnectorFront panel in Remote mode MD Mode SRQ Retransmission MD Mode DescriptionMD Mode enable Serial communication mode MD Mode SRQSingle power supply Connecting Power Supplies to RS232 or RS485 BUSCommunication Interface Protocol Command SET Description Error MessagesID Control Commands Initialization Control CommandsOutput Control Commands OUT? DVC?Filter FILTER?Global Output Commands Enable SRQ retransmission MD Mode Option Required Single Byte CommandsEnable MD Mode MD Mode Option Required Disable SRQ retransmission MD Mode Option RequiredPrint Power On Time Addressed commands with response Read registersRetransmit Last Message Addressed commands without response Acknowledge SRQ Test if MD Mode is InstalledRe-enable SRQ with out reading/clearing the Seve Register 110x Status Control Commands STATUS, Error and SRQ RegistersTXD Conditional RegistersBIT Service Request Enable and Event RegistersFault Event Register Fault Enable RegisterStatus Event Register Status Enable RegisterSerial Communication Test SET-UP Power supply set-upCommunication Test PPM/C SpecificationsIsolated Analog Programming Option 1 0-5V/0-10V Option PN IS510Isolated Programming & Monitoring Connector Setup and Operating Instructions Maintenance OUP Fuse Rating
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