title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

AC-DC Power Supplies Bus Converter . Power Module Type TUNS300F, TUNS500F, TUNS700F, TUNS1200F Instruction Manual4 Series and ParallelOperation4.1 Series operation!Series operation is available by connecting the outputs of two ormore power supplies as shown below. Output current in seriesconnection should be lower than the lowest rated current in eachunit.(a)(b)PowerSupplyPowerSupplyPowerSupplyPowerSupplyLoadLoadLoadFig. 4.1 Examples of series operation4.2 Parallel operation?TUNS300F/500F/700F!Parallel operation is not possible.?TUNS1200F!Parallel operation is available by connecting the units as shown inFig.4.2. With this wiring, it is possible to adjust all output in moduleby single potentiometer. When output voltage adjustment is not inuse, VTRM wiring, VR1 are not necessary.!Constant current adjustment can be used, even in parallel operation.By changing the ITRM voltage of one power supply, constantcurrent adjustable for all power supplies. It is not necessary toconnect the ITRM terminals together.!Total current should not exceed the value calculated by the followingequation, and total number of units should be no more than 9pieces.(Output current at parallel operation)= (the rated current per unit)×(number of unit)×0.9!Please make sure that the wiring impedance of a load from eachpower supply becomes even.!Voltage drop from a power supply to the sensing point should beless than 0.5V for stable control.!If temperatures of aluminum base plates are different in the powersupply for parallel operation, the difference in output current becomeslarge. Design radiation to equalize plate temperatures byattaching the same heat sinks.!Connect the sensing line and the power line by one point afterconnecting each power supply’s sensing pins(+S, -S).!If the output current is less than 2% of the rated current, the outputTUNS-29voltage ripple will be large.!When the input voltage is applied with remaining the voltage atboost capacitor Cbc, startup time would be different for eachparalleled module. If all paralleled modules need to startup at thesame time, remote control function shall be used.!Examples of connecting remote ON/OFF circuit during parallel operationis shown in Fig.4.3.AC INF1F1F1NoisefilterFG FGNoisefilterFG FGNoisefilterFG FGC1C1AC1AC2FGC3AC1AC2FGC3R+BCTFR1+C2CbcRAC1C1AC2FG RC3+BCTFR1+C2Cbc+BCTFR1+C2Cbc+VOUT+SVTRMCB-S-BC -VOUTCY1+VOUT+SVTRMCB-S-BC -VOUTCY1+VOUT+SVTRMCB-S-BC -VOUTCY1VR1Co +Co +Co +Fig.4.2 Examples of parallel operation (TUNS1200F)AUXRC1RC2－SAUXRC1RC2－SAUXRC1RC2－SOFFONLoadPOWERFig.4.3 Examples of connecting remote ON/OFF circuit during parallel operation!Please refer to the application manuals for details of parallel operation.Application manual is on our web site.? ?P (TUNS700F)!This option is for parallel operation.!Sensing and adjustment of the output voltage are not possible atthe time of the use with this option.!As variance of output current drew from each power supply ismaximum 10%, the total output current must not exceed the valuedetermined by the following equation.(Output current in parallel operation)=(the rated current per unit)×(number of unit)×0.9Total number of units should be no more than 5 pieces.