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電源選型推薦

整個DTU系統(tǒng)的電源解決方案，主要考慮到不間斷供電的問題，所以需要雙電源供電的一個供電形式，主流的供電方式一般是有兩部分組成，一部分是大功率300W或者500W的AC/DC充電電源，這個電源一般兩路輸出，一路給后級的板卡進行供電，一方面給后級的蓄電池或者是超級電容進行充電；另外的一部分就是蓄電池或者超級電容，這個主要是在市電斷電的情況下，保證整個系統(tǒng)的正常運行。另外，電網(wǎng)對于EMC方面的要求比較苛刻，特別是浪涌方面，需要完全滿足4級的要求。主電源和蓄電池都掉電時，系統(tǒng)掉電保持時間500mS以上。

根據(jù)上面的應用描述，我們推薦選用金升陽MBP500-2A54D54的接線式電源，它具備電池充電功能，可對48V 鉛酸電池充電；工業(yè)級工作溫度：-40℃～+70℃；2500VAC 高隔離電壓；大瞬時過功率達540W；優(yōu)越的EMC性能；接線式安裝。

另外，如果鉛酸電池的電壓值為24V，還可以選用金升陽公司的MBP300-2A27D27的接線式電源，可對24V的鉛酸電池充電，穩(wěn)態(tài)功率達到351W。
電源是各種電子設備必不可缺的組成部分,其性能優(yōu)劣直接關系到電子設備的技術指標及能否安全可靠地工作。目前常用的直流穩(wěn)壓電源按功率管的工作方式分為線性電源和開關電源兩大類。線性穩(wěn)壓電源亦稱串聯(lián)調(diào)整式穩(wěn)壓電源,電路技術比較成熟。具有低紋波、高穩(wěn)壓性能等優(yōu)點。但由于必須使用工頻變壓器,且調(diào)整管工作在線性放大區(qū),因而體積大和重量大、效率低。開關電源調(diào)整管工作在高頻開關狀態(tài),功率損耗小,且使用小體積的高頻變壓器替代笨重的工頻變壓器來實現(xiàn)電壓變換和電網(wǎng)隔離。
為解決傳統(tǒng)的PWM型變換器的上述問題,可采用諧振、準諧振、多諧振以及具軟開關的PWM型變換器。這些變換器吸收、利用了PWM型變換器中的寄生參數(shù)或外加電感、電容作為諧振參數(shù),使變換器中的功率開關在零電壓或零電流下開通和關斷,開關兩端的電壓或經(jīng)過開關的電流是正弦或半正弦波形。因此大大減少開關的瞬問損耗和開關應力以及電磁干擾和射頻干擾.使其工作頻率可進一步提高到1Mhz以上，效率達90%以上。再加上小型片狀電子元器件,包括磁性材科,例如:平板型變壓器等以及表面安裝技術以及散熱方式的改進，就使電源系列、標準化、模塊化成為現(xiàn)實。

Yokogawa] F3CX04-0N Temperature Monitor Yokogawa PLC        EMS/UPS Fast Shipping
[Yokogawa] F3CX04-0N Temperature Monitor Yokogawa PLC        EMS/UPS Fast Shipping
[Yokogawa] F3EM01-0N Memory Card +1GB Unit Yokogawa PLC        EMSUPS FastShipping
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[Yokogawa] F3LE01-5T Ethernet card Yokogawa PLC        EMS/UPS Fast Shipping
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0-150V AC Panel Meter YOKOGAWA 250344PZPZ7/UL
02M8959 Yokogawa B9901Ax 6-Color Ribbon Cassette
0-300V AC Panel Meter YOKOGAWA 250344RXR7/UL
0-6000 AC Kilowatts Panel Meter Yokogawa
1       YOKOGAWA 152121ECRX PANEL METER NIB
1       YOKOGAWA 250240LSMT PANEL METER ***MAKE OFFER***
1       YOKOGAWA 250240LSMT PANEL METER NIB
1       YOKOGAWA 250300LALA8KAF DC VOLT METER ***MAKE OFFER***
1       YOKOGAWA 250340LS-SU7/UL/KNC 0-1200 AC AMPERES PANEL METER NIB
1       YOKOGAWA 251440LSRL PANEL METER ***MAKE OFFER***
1       YOKOGAWA 254224ECSF DC AMPERES WHITE PANEL METER NIB ***MAKE OFFER***
1       YOKOGAWA 255224GBRX8 PANEL METER NIB
1       YOKOGAWA 260-300-FAFA '0-160 PERCENT RATED' METER ***MAKE OFFER***
1       YOKOGAWA DYA S1 VORTEX FLOW CONVERTER ***MAKE OFFER***
1       YOKOGAWA EJA-120A PRESSURE TRANSMITTER NIP *MAKE OFFER*
1       YOKOGAWA M60690 WHITE FACE 400AMP DC PANEL METER NIB
1 NIB YOKOGAWA EJA110A-ELS4B-92EA/FF1/D1 TRANSMITTER EJA110AELS4B92EAFF1D1
1 NIB YOKOGAWA JUXTA SIGNAL CONDITIONER FG1V*A FG1VA FG1V-A 0-150 VAC 1-5 VDC
1 NOS YOKOGAWA METER AB-14 6625-01-038-6835 AC KILOAMP FREE SHIPPING! 3.
1 PC Uesd Yokogawa UP750-50（S3） In Good Condition
1 PC               Yokogawa CPU F3XD64
1 PC        Yokogawa dcs S9943AL
1 PC        Yokogawa F3WD64-3P
1 PC YOKOGAWA CS3000 DCS system module AAP135-S00
1 PC Yokogawa DY100-DALSS4-0D
1 PC Yokogawa F3DA08-5N
1 PC Yokogawa F3LC11-1F
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1 PC Yokogawa NFLR121-S00
1 PC Yokogawa PLC F3LU01-0N
1 pcs YOKOGAWA DD motor DM1015B00 tested
1 PCS Yokogawa F3AD04-0N
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1 PCS Yokogawa F3SP10-0N
1 PCS Yokogawa F3SP28-3N
1 PCS Yokogawa F3SP30-0N
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1 PCS Yokogawa F3WD64-3N
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1 PCS Yokogawa F3YD14-5B
1 PCS Yokogawa F3YD64-1M
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1 PCS Yokogawa NFCP100-S00
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1 PCS Yokogawa PLC F3SP35-5N
1 PCS Yokogawa PLC F3XD16-3N
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1 PCS YOKOGAWA servo TM1L-230B
1 PCS Yokogawa Y3NC52-0N
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100%       YOKOGAWA JUXTA SIGNAL CONDITIONER W SERIES LIMIT ALAR