title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies DIN Rail TypeInstruction ManualA unit automatically recovers when the fault condition is removed.Note :Please avoid applying a voltage exceeding the rated voltage to anoutput terminal. Doing so may cause a power supply to malfunctionor fail. If you cannot avoid doing so, for example, if you needto operate a motor, etc., please install an external diode on theoutput terminal to protect the unit.1.6 Thermal Protection? KHEA120F/240F/480F, KHNA120F/240F/480F!A thermal protection circuit is built-in.The thermal protection circuit may be activated under the followingconditions and shut down the output.1 When a temperature continue to exceed the values determinedby the derating curve.2 When a current exceeding the rated current is applied.3When convection stops.4 When peak load is applied in conditions other than those shownin Section 3.A unit automatically recovers when the fault condition is removed.1.7 Output Ripple and Ripple Noise!Output ripple noise may be infl uenced by measurement environment,measuring method fi g 1.1 is recommended.+Vout-VoutOsiloscope/Ripple noise meterBw:20MHzC1 C2 +150mmLoadDifferential probeC1:Film capacitor 0.1mFC2:Aluminum electrolytic capacitor 22 mFFig.1.1 Measuring method of Ripple and Ripple Noise1.8 Remote ON/OFF? KHEA120F/240F/480F, KHNA120F/240F/480F!You can reduce the standby power by Remote ON/OFF.To do so, connect an external DC power supply and apply a voltageto a remote ON/OFF connector.Table 1.2 Remote ON/OFF Specifi cationsON/OFF logic Between +RC and -RC Output voltageL level (0 to 0.5V) or openONNegativeH level (4.5 to 29.5V)OFFExternal PowerSouceR *1Input current(20mA max)SW+RC-RCInside of a PowerSupplyFig.1.2 Example of use with remote ON/OFFRi=2040W*1 If the output of an external power supply is within the range of4.5 - 29.5V, you do not need a current limiting resistor R. If theoutput exceeds 29.5V, however, please connect the current limitingresistor R.To calculate a current limiting resistance value, please use the followingequation.R [W]=Vcc-(1.1+RiX0.005)0.005!Please wire carefully. If you wire wrongly, the internal componentsof a unit may be damaged.!Remote ON/OFF circuits (+RC and -RC) are isolated from input,output and PE.!Restart time is 750 ms max .1.9 Output Voltage Adjustment Range!To increase an output voltage, turn a built-in potentiometer clockwise.To decrease the output voltage, turn it counterclockwise.1.10 Isolation!When you run a Hi-Pot test as receiving inspection, graduallyincrease the voltage to start. When you shut down, decrease thevoltage gradually by using a dial. Please avoid a Hi-Pot tester witha timer because, when the timer is turned ON or OFF, it may generatea voltage a few times higher than the applied voltage.!When you test a unit for isolation between the output and theDC_OK, short all terminals of DC_OK.1.11 Signal OutputFunctions of LED indicators and signal output (KHEA series)? KHEA120F/240F/480F, KHNA120F/240F/480F!Functions of LED indicators and signal output in the form of relaycontact are shown below. Checking the presence/absence of voltageat the output terminal of a power supply is possible.Table 1.3 Description of the signal outputSignal OutputNormalOutput is decreasingDC_OK (LED: Green)ONOFFALARM (LED: Red)OFFONDC_OK (Relay Contact)*ShortOpen*DC_OK signal (relay contact) is built in KHEA series. This circuitis insulated from other circuits (input and output circuits).Caution on signal outputs :!The timing of signals might be very depending on models, inputand load conditions. Please make sure enough evaluation.KH-23