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 TypeTUNS300F, TUNS500F, TUNS700F, TUNS1200FInstruction Manual!AUX is designed as shown in Fig.3.3, and a resistor (1.1kΩ) isbuilt in to protect the short circuit.Output voltage decreases as theoutput current increases.12V typ3.8 Remote sensing!Remote sensing is built-in.1.1kΩFig.3.3 AUX circuitAUX(1) When the remote sensing function is not in use+STUNS300FTUNS500F +VOUTTUNS700F-VOUTTUNS1200F-S+ CoShort at pin root-SLoadFig. 3.4 Connection when the remote sensing is not in use3.9 Adjustable voltage range?TUNS300F/500F/700F (TRM)!Output voltage between +VOUT and -VOUT can be adjusted byconnecting external resistors to TRM.!When the output voltage adjustment is not used, open the TRMpin respectively.!When the output voltage adjustment is used, note that the overvoltageprotection circuit operates when output voltage is set too high.!The wiring to the potentiometer should be as short as possible.As the ambient temperature fl uctuation characteristics deterioratedepending on the types of resistors and potentiometers, pleaseuse resistors and potentiometers of the following specifi cations:Resistors ............. Metal fi lm type, coeffi cient less than±100ppm/CPotentiometers ... Cermet type, coeffi cient less than±300ppm/C!Output voltage can be adjusted by connecting an external potentiometer(VR1) and resistors (R1 and R2) as shown in Fig. 3.6.Output voltage will increase if the resistance between 2 and 3 isreduced by turning the potentiometer.Recommended values for external components are shown inTable 3.3.Consult us if the power module is used in a different confi guration.!When the remote sensing function is not in use, it is necessary toconfi rm that pins are shorted between +S & +VOUT and between-S & -VOUT.!Wire between +S & +VOUT and between -S & -VOUT as short aspossible.Loop wiring should be avoided.This power supply might become unstable by the noise comingfrom poor wiring.TUNS300FTUNS500FTUNS700F+VOUT+STRM-S-VOUTExternal Resistor R11External VR1235kWExternal Resistor R2(2) When the remote sensing function is in use+STUNS300FTUNS500F +VOUTTUNS700F-VOUTTUNS1200F-S+CoWire as close as possibleLoadFig. 3.5 Connection when the remote sensing is in use!Twisted-pair wire or shield wire should be used for sensing wire.!Thick wire should be used for wiring between the power supplyand a load.Line drop should be less than 0.5V.Voltage between +VOUT and -VOUT should remain within theoutput voltage adjustment range.!If the sensing patterns are short, heavy-current is drawn and thepattern may be damaged.The pattern disconnection can be prevented by installing the protectionparts as close as a load.!As wiring or load impedance may generate oscillation or largefluctuations in output voltage, make sure enough evaluation isgiven advance.Fig. 3.6 Connecting External Devices (TUNS300F/TUNS500F/TUNS700F)Table 3.3 Recommended Values of External Resistors (TUNS300F/TUNS500F/TUNS700F)OutputAdjustable RangeNo.VOUT±5%VOUT±10%VoltageR1 R2 R1 R2112V12kW6.8kW228V39kW2.2kW27kW1.0kW348V68kW47kW?TUNS1200F (VTRM)!Output voltage between +VOUT and -VOUT can be adjusted byconnecting external resistors to VTRM or by applied voltage externally.!When the output voltage is adjusted to less than the adjustmentvoltage range, the output ripple voltage might increase.!When the output voltage adjustment is not used, open the VTRMpin.(1) Output voltage adjustment by potentiometer!By connecting the external potentiometer (VR1) as shown inFig.3.7., output voltage becomes adjustable.!The wiring to the potentiometer should be as short as possible.As the ambient temperature fl uctuation characteristics deterioratedepending on the types of resistors and potentiometers, pleaseTUNS-26