title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Medical TypeInstruction Manual1 Function1.1 Input voltage range!Input voltage range of the power supplies is from AC85V toAC264V (please see SPECIFICATIONS for details).!In cases that conform with safety standard, input voltage range isAC100-AC240V (50/60Hz).!If input value doesn’t fall within above range, a unit may not operatein accordance with specifi cations and/or start output voltagehunting or fail.If you need to apply a square waveform input voltage, which iscommonly used in UPS and inverters, please contact us.!When the input voltage changes suddenly, the output voltage accuracymight exceed the specifi cation. Please contact us.? PMA15F, PMA30F!A power factor improvement circuit (active fi lter) is not built-in. Ifyou use multiple units for a single system, standards for input harmoniccurrent may not be satisfied. Please contact us for details.1.2 Inrush current limiting!An inrush current limiting circuit is built-in.!If you need to use a switch on the input side, please select onethat can withstand an input inrush current.!Thermistor is used in the inrush current limiting circuit. When youturn the power ON/OFF repeatedly within a short period of time,please have enough intervals so that a power supply cools downbefore being turned on.1.3 Overcurrent protection!An overcurrent protection circuit is built-in and activated over105% of the rated current. A unit automatically recovers when afault condition is removed.Please do not use a unit in short circuit and/or under an overcurrentcondition.!Hiccup Operation ModeWhen the overcurrent protection circuit is activated and the outputvoltage drops to a certain extent, the output becomes hiccup sothat the average current will also decrease.1.4 Overvoltage protection!An overvoltage protection circuit is built-in. If the overvoltage protectioncircuit is activated, shut down the input voltage, wait morethan 3 minutes and turn on the AC input again to recover the outputvoltage. Recovery time varies depending on such factors asinput voltage value at the time of the operation.Remarks :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.1.5 Output voltage adjustment!To increase an output voltage, turn a built-in potentiometer clockwise.To decrease the output voltage, turn it counterclockwise.1.6 Isolation!For a receiving inspection, such as Hi-Pot test, gradually increase(decrease) the voltage for the start (shut down). Avoid using Hi-Pot tester with the timer because it may generate voltage a fewtimes higher than the applied voltage, at ON/OFF of a timer.1.7 Remote ON/OFF? PMA15F, PMA30F!These models do not have a remote ON/OFF function.? PMA60F, PMA100F!Option -R is available to provide a remote ON/OFF function.Please see”5 Option and Others”for details.2 Series Operation andParallel Operation!You can use a power supply in series operation. The output currentin series operation should be lower than the rated current of apower supply with the lowest rated current among power suppliesthat are serially connected. Please make sure that no current exceedingthe rated current fl ows into a power supply.Power +Supply -Power +Supply -(a)LoadPower +Supply -Power +Supply -(b)Fig.2.1 Examples of connecting in series operationLoad LoadPMA-13