title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

12AC-DC Power Supplies Medical TypeGHA300F, GHA500FInstruction Manual* If the output of an external power supply is within the range of4.5 - 12.5V, you do not need a current limiting resistor R1. Ifthe output exceeds 12.5V, however, please connect the currentlimiting resistor R1.To calculate a current limiting resistance value, please use the followingequation.? ?SNFR1[W]= V1-(1.1+RiX0.005)0.005Ri=440[W]!Chassis and a cooling fan are added.!Oil and chemical environment may cause of power supply’s malfunctionor failure. Please avoid operation and storage in suchenvironments.!DeratingIt should be satisfi ed that derating curve depending on input voltageand on ambient temperature in“Derating”. As the verifi cationmethod, temperature of measurement point A should be ratedtemperature or less in Table 6.4.7 8Point AFig.6.4 Measurement point ATable 6.4 Rated temperature of measurement point AAmbient temperatureMeasurment50C70CPoint A 65C or less 78C or less!When output current more than rated, output may shut down after5 seconds or more. Recycle the input after 3 minutes to reset theprotection.!Maintenance of FANFAN life time expectancy (R(t)=90%) in Fig.6.5 is depended onmeasurement point temperature in Fig.6.6, which exhaust air temperaturefrom FAN at input terminal side.If load wires are generating heat, intake air temperature may becomehigh. It may infl uence to FAN exhaust temperature. It is anotice that optical wires have to be selected for the avoidance.When FAN stop or air volume decrease happen, power supply’soutput will be shut down.? ?T3Measurement pointAir flow20mmInputOutputFig.6.6 Measurement of FAN exhaust temperatureFANPower supply(Top view)!M3 threaded mounting hole is available as an option (?T3).? ?P(a) T3 (Threaded mounting hole)Case: Tap(b) Standard (Through hole)Fig.6.7 Screw mounting image!Parallel operation is available (Recommended two).!Output wattage setting is 90% per power supply of MAX OUTPUTWATTAGE.Remarks:-The difference of output voltage between power supply for paralleloperation should be less 0.1V.-During parallel operation, higher voltage power supply becomethe master in system. Depend on voltage difference betweenmaster and slave, the master power supply may recover thesystem’s required wattage up to 90% of MAX OUTPUT WATT-AGE.The master unit should be evaluated for heat dissipation, lifeexpectancy and warranty period according to derating and Section4.-Parallel operation, due to the fl uctuation of load, the output voltagemay be varied.There is a possibility that beat noise occurs due to the differenceof the oscillation frequency. Please use after enough evaluation.-Forced air cooling is required.-Input voltage ought be AC115V or more.6.2 Medical Isolation Grade!GHA series fi t 2MOPP2MOPPExpected lifetime [H]1,000,000100,00010,0001MOPPprimary secondarySafety GND20 30 40 50 60 70 80FAN exhaust temperature [C]Fig.6.5 Expected life time of FANFig.6.8 Medical Isolation GradeGHA-22