title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

DC-DC Converters Bus Converter . Power Module TypeInstruction Manual?-U!Option”-U”means output is shut down when the abovementionedprotection circuit is activated.If this happens, protection circuit can be inactivated by cyclingthe DC input power off for at least 1 second or toggling RemoteON/OFF signal.3.4 Remote ON/OFF!Remote ON/OFF circuit is built-in on the input side (RC).The ground pin of input side remote ON/OFF circuit is”-VIN”pin.Table 3.1.1 Specifi cation of Remote ON/OFF(CHS80,CHS200)ON/OFFOutputBetween RC and -VINlogicvoltageL level(0 - 0.8V) or short ONStandard NegativeH level(2.0 - 7.0V) or open OFFL level(0 - 0.8V) or short OFFOptional -R PositiveH level(2.0 - 7.0V) or open ONWhen RC is”Low”level, fan out current is 0.1mA typ. When Vcc is applied,use 2.0[Vcc[7.0V.Table 3.1.2 Specifi cation of Remote ON/OFF(CHS60,CHS120,CHS300,CHS380,CHS400,CHS500,CHS700)ON/OFFOutputBetween RC and -VINlogicvoltageL level(0 - 0.8V) or short ONStandard NegativeH level(4.0 - 7.0V) or open OFFL level(0 - 0.8V) or short OFFOptional -R PositiveH level(4.0 - 7.0V) or open ONWhen RC is”Low”level, fan out current is 0.1mA typ. When Vcc is applied,use 4.0[Vcc[7.0V.!When remote ON/OFF function is not used, please short between RC and-VIN (-R: open between RC and -VIN).3.5 Remote sensingVcc(2.0[Vcc[7.0V)RCRC-VIN-VINPhoto couplerTransistorRCRC-VIN-VINICRelayFig.3.1 RC connection example(1) When the remote sensing function is not in use+VOUT+SLoad-S-VOUTShort at pin root!When the remote sensing function is not in use, it is necessary to confi rmthat pins are shorted between +S & +VOUT and between -S & -VOUT.!Wire between +S & +VOUT and between -S & -VOUT as short as possible.Loop wiring should be avoided.This power supply might become unstable by the noise coming from poorwiring.(2)When the remote sensing function is in useWire as close as possible+VOUT+SLoad-S-VOUTFig.3.3 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 0.3V.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 possible to a load.!Output voltage might become unstable because of impedance ofwiring and load condition when length of wire exceeds 40cm.3.6 Adjustable voltage range(1) To adjust output voltage!Output voltage is adjustable by the external potentiometer.!When the output voltage adjustment is used, note that the overvoltage protection circuit operates when the output voltage is settoo high.!If the output voltage drops under the output voltage adjustmentrange, the Low voltage protection operates.!By connecting the external potentiometer (VR1) and resistors (R1,R2), output voltage becomes adjustable, as shown in Fig.3.4.Recommended external parts are shown in Table 3.2.!The wiring to the potentiometer should be as short as possible.The temperature coeffi cient could become worse, depending onthe type of a resistor and potentiometer. Following parts are recommendedfor the power supply.Resistor ............. Metal film type, coefficient of less than±100ppm/CPotentiometer .... Cermet type, coeffi cient of less than±300ppm/C!When the output voltage adjustment is not used, open the TRMpin respectively.!The change speed of the TRM voltage should be less than 0.15V/ms.Fig.3.2 Connection when the remote sensing is not in useCHS-41