Lambda Sirius 250 Instruction Manual

Lambda Sirius 250 Instruction Manual Manual pdf 1 page image

Sirius 250 Handbook Part Number 17132Input ParametersNOMINAL INPUT VOLTAGE RANGE 94.5 - 240VAC or 133-330VDCMAX. INPUT VOLTAGE RANGE 85-264VAC or 120-360VDCINPUT FREQUENCY 47-63HzMAXIMUM INPUT CURRENT 5A AC or 3.4A DCINRUSH CURRENT <50 AMPSOutput ParametersAdjustment and Derating.The Sirius 250 series is designed to provide a max output power of 250W atnominal output voltages. The following procedure must be used to ensure thePSU is operated within its ratings:a Calculate user power for each module (volts x amps).b Add all the individual module powers together. The total power must notexceed the value given in the following tables.c Calculate secondary transformer turns x amps for each module. (Seeoutputs table for transformer secondary turns).d Add all the module turns x amps together and this must not exceed 75AT.e If necessary reduce the loading until the conditions are met, ie. power andampere-turns maxima.OUTPUTSCooling,Output Power and Output Current Limitationsi) Power limitation method.Integral Fan Cooling (all orientations)Normal Airflow(air into unit at input end)Reverse Airflow(air into unit at outputend)Top Fan with Molex(TM) End Fan with Molex(EM) End Fan with IEC(EI & EIF) End Fan with IEC(EIR & EIFR)245W 250W 250W 210WTo determine the component temperatures tests must be conducted in accord-ance with the requirements of IEC/EN/UL/CSA60950-1, Clause 4.5. Considera-tion should also be given to the requirements of other safety standards. Note:Max. temperatures given are as required by EN60950-1 or to provide satisfac-tory reliability, whichever is the lower.Test requirements include: PSU to be fitted in its end-use equipment and oper-ated under the most adverse conditions permitted in the end-use equipmenthandbook/specification and which will result in the highesttemperatures in the PSU. To determine the most adverse conditions consid-eration should be given to the maximum operating ambient, PSU loading andinput voltage, ventilation, equipment orientation, the position of doors & covers,etc. Temperatures should be monitored using type K fine wire thermocouples(secured with cyanoacrylate adhesive, or similar) placed on the hottest part ofthe component and the equipment should be run until all temperatures havestabilised.Customers Airflow (all orientations) (NM)Normal Airflow (air into unit at input end) Reverse Airflow (air into unit at output end)2.5 m/s 3 m/s 2.5 m/s 3 m/s220W * 230W 175W 200WCircuit Ref Description Max Temp ( 0 C)TX1 Power transformer primary, secondary and core 130TX2 Drive transformer windings 110L1 & L6 Choke winding 110L12 Choke winding and core 120- All other choke windings 115F1 Input fuse end cap and clip 100C1 & C18 X capacitors 100C5 Reservoir electrolytic capacitor 85- Electrolytic capacitors < 10mm diaameter 90- Electrolytic capacitors >- 10mm diameter 95* Output 2, 3.3V, is derated to 15A from 16A.ii) Temperature Measurement Method:The following method must be used for determining the safe operation of PSU’swith the LM option (open frame). It may be used as an alternate method to (i)above, for determining the safe operation of NM option PSU’s.For PSU’s cooled by customer supplied airflow the components listed in thetable below must not exceed the temperatures given (including when the enduse equipment is operated at its maximum permitted ambient), consequentlythe maximum temperature rise permitted is given by the temperatue given in thetable minus the T mra (maximum ambient) of the end use environment (maxi-mum permitted T mra is 50 0 C). All other ratings given in this handbook remainunchanged except that the maximum output power is 250W.Module OutputRange Current Turns Short CircuitCurrent (*3)Min setting forHazardous Energy(*4)5/3 base 5.0 - 5.7V 35A(*2) 1T 80A 3V2.7 - 3.5V 16A 1T 80A -5/12 base 5.0 - 5.7V 35A(*2) 1T 80A 3V11 - 16V 8A (12A peak) 4T 20A -5 base 5 - 5.7V 35A(*2) 1T 80A 3V24 base 23-28V 10A(*2) 4T 20A 12VA 4.5 - 5.5V 10A 2T 40A -B 11 - 15V 8A 4T 20A -C 16 - 28V 4A 8T 10A -D 4.5 - 5.5V 5A 2T 40A -2.7 - 3.9V 5A 2T 40A -E 4.5 - 5.5V 5A 2T 40A -9 - 15V 4A 4T 20A -F 4.5 - 5.5V 5A 2T 40A -16 - 28V 2A 7T 11.5A -G 9 - 15V 4.5A 4T 20A -9 - 15V 4.5A 4T 20A -H 9 - 15V 4A 4T 20A16 - 28V 2A 7T 11.5A -J 16 - 28V 2A 7T 11.5A -16 - 28V 2A 7T 11.5A -L 1.8 - 3.9V 10A 2T 40A -M 4.5 - 5.5V 5A 2T 40A -4.5 - 5.5V 5A 2T 40A -N 11 - 14.5V 8A 4T 20A -*2 = A minimum load of 10% is required on these outputs.*3 = Maximum current if output is short circuited, within 1 minute current limit changes to‘hiccup’ mode to give a lower average current.*4 = It may not be possible to set the output this low.Output RatingsSee component layout drawing on page 4Approval Limitations: Use in North America (AC units only)When this product is used on 180VAC-250VAC mains with no neutral, connect the two live wiresto L(live) and N (neutral) terminals on the input connector. In this instance double pole fusing isrequired.High Voltage WarningDangerous voltages present within the power supply. Do not remove covers.External Hot SurfacesSection 6 of the Health and Safety at Work Act requires that manufacturers have an obligation toprotect service engineers as well as users. In order to comply with this, a label must be fitted tothese products which is clearly visible to service personnel accessing the overall equipment, andwhich legibly warns that surfaces of these products may be hot and must not be touched when theproducts are in operation.Safety Earthing ScrewOn products with an enclosure, special safety earthing screws are used which connect the cover tothe chassis. They must not be removed.Safety Class of ProtectionThese products are designed for the following parameters : Material Group IIIb, Pollution Degree 2,Overvoltage Category II, Class 1 (earthed), Indoor use as part of an overall equipment such thatthe product is accessible to service engineers only.Energy and Voltage HazardsCertain modules are capable of providing hazardous energy (240VA) according to output voltagesetting. Final equipment manufacturers must provide protection to service personnel againstinadvertent contact with these module output terminals. If set such that hazardous energy canoccur then the module terminals or connections must not be user accessible.Non-seriesed outputsthat are earthed in the end use equipment are SELV .If outputs are not earthed they must beconsidered hazardous, as a single fault in the secondary may make them exceed the SELV limitsbetween output and earth. If any output is non-SELV then all outputs become non SELV. Outputsconnected in series may produce non-SELV levels, and this must be taken into account in theend-use application.ServicingThese products are not customer serviceable. Repairs may only be carried out by Lambda UK ortheir authorised agents. These products are not authorised for use as critical components in nuclearcontrol systems, life support systems or equipment for use in hazardous environments without theexpress written approval of the Managing Director of Coutant Lambda Ltd.Important safety instructions

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