title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Enclosed TypeInstruction Manual2 Series/ParallelOperation2.1 Series Operation? FETA2500BA, 3000BA, 7000T, 7000ST!It is possible to connect multiple output voltages in series in orderto obtain higher output voltage. However, care should be taken asfollows:Notes of (a) and (b) :1 Please note that the maximum current available to the load isequal to the current of the lowest rated supply in the string.2 In case of malfunction (Failure or protection circuit activation),please stop the operation and replace the failed power supply.FETA-25Power +Supply -Power +Supply -Power +Supply -Power +Supply -Power +Supply -Power +Supply -Remote ON/OFFcircuit (OFF signal)(c)(a)Remote ON/OFFcircuit (OFF signal)(b)Load LoadAlarm signaldetect circuitOutput voltagemonitor circuitFig.2.1 Examples of connecting in series operationLoad Load2.2 Parallel Operation/Master-slave Operation!You can use the power supplies in parallel operation by connectingunits as shown in Fig.2.2.Please parallelly connect VB, CB and COM of each power supplyin parallel operation.Power supplyPower supplyPower supply+VVBCBCOM-V+VVBCBCOM-V+VVBCBCOM-VLoadFig.2.2 Example of parallel connection!Differences in the output current values among the power suppliesin parallel connection are 5% at most. Please make surethat the sum of the output current values does not exceed a valueobtained from the following equation.(Output current in parallel operation)= (Rated current per unit) X (Number of unit) X0.95! When the number of units in parallel operation increases, the inputcurrent also increases. Please design input circuitry (includingcircuit pattern, wiring and current capacity for equipment) carefully.! Please make sure that the wiring impedance of a load from eachpower supply becomes even. Otherwise, the output current balancecircuit may become inoperative.! The maximum number of units in parallel operation for FETA2500BA,3000BA, 3000BC are 10 and for FETA7000T, 7000ST are 3.! You can adjust the output voltage in parallel operation by adjustingthe potentiometer of just one power supply.To do so, select one power supply as the master unit and turn thepotentiometers of the other (slave) power supplies clockwise tothe end.Once you have done this, you can adjust the output voltage byturning the potentiometer of the master unit.! Parallel connection with other products is not allowed.2.3 N+1 Parallel Redundancy Operation! You can have N+1 redundancy operation for improved system reliability.! N+1 redundancy operation is possible by connecting units asshown in Fig.2.3.VB, CB and COM are also connected together between all unitsin parallel.! The output voltage gap of paralleled units must be adjusted within+/-1,000mV for 250V type, +/-600mV for 144V type, and +/-200mVfor the other output models.! Output current calculation is required based on following equation.