VIBRO METER VM600 MPC4 200-510-070-113
時間:2018-03-14作者:廈門仲鑫達(dá)科技有限公司瀏覽:27
主要通過電源和信號線引入,通常稱為傳導(dǎo)干擾。這種干擾在我國工業(yè)現(xiàn)場較嚴(yán)重。
(1)來自電源的干擾
實踐證明,因電源引入的干擾造成PLC控制系統(tǒng)故障的情況很多,筆者在某工程調(diào)試中遇到過,后更換隔離性能較高的PLC電源,問題才得到解決。
PLC系統(tǒng)的正常供電電源均由電網(wǎng)供電。由于電網(wǎng)覆蓋范圍廣,它將受到所有空間電磁干擾而在線路上感應(yīng)電壓和電路。尤其是電網(wǎng)內(nèi)部的變化,入開關(guān)操作浪涌、大型電力設(shè)備起停、交直流傳動裝置引起的諧波、電網(wǎng)短路暫態(tài)沖擊等,都通過輸電線路傳到電源原邊。PLC電源通常采用隔離電源,但其機(jī)構(gòu)及制造工藝因素使其隔離性并不理想。實際上,由于分布參數(shù)特別是分布電容的存在,**隔離是不可能的。
ASHCROFT 35W1005PH 02L XUL PRESSURE GAUGE 0-300PSI 3.5IN 1/4IN NPT D585595
ASHCROFT DURALIFE PRESSURE GAUGE 0-30PSI 3-1/2 IN 1/4 IN NPT D578604
ASHCROFT PRESSURE GAUGE 0-160PSI 3-1/2 IN 1/4 IN NPT D578551
ASHCROFT 25W1005-H-02L-6?0 0-60PSI 2-1/2IN 1/4 IN NPT PRESSURE GAUGE D532801
ASHCROFT 25-1009-SWL-02L?-1000KP-XGV 0-1000KPA PRESSURE GAUGE D563222
ASHCROFT 35-1009-AW-02L-?1600KP GAUGE 0-1600KPA 3-1/2 IN 1/4IN NPT D563033
FISHER 11B4040X032 0-160PSI 1/8 IN NPT PRESSURE GAUGE D563240
BII 213.53 PG25-300-G 0-300PSI 2-1/2 IN 1/4 IN NPT PRESSURE GAUGE D563045
ASHCROFT 25-1009-SWL-02L?-250KP PRESSURE GAUGE 0-250KPA 2-1/2 IN D563035
MARSH J8046 0-60PSI 3-1/2 IN 1/4 IN NPT PRESSURE GAUGE D563034
BII 213.53 PG25-600-G 0-600PSI 2-1/2 IN 1/4 IN NPT PRESSURE GAUGE D563041
ASHCROFT 35W1005H02L300 PRESSURE GAUGE 0-300PSI 3-1/2IN 1/4IN NPT D563031
ASHCROFT 35W1005PH 02L XUL 300 PRESSURE GAUGE 0-300PSI 3-1/2 IN D563030
ASHCROFT 25W1005 H 02L VAC 0-30IN-HG 2-1/2IN 1/4IN NPT PRESSURE GAUGE D545826
ASHCROFT DURALIFE 250-2456B 0-60PSI 1/4 IN NPT PRESSURE GAUGE D550737
TRERICE 700LFSS2502LA10?0 FLUID FILLED 0-60PSI 2-1/2 IN GAUGE D542161
TRERICE B83104X08 THERMOMETER 50-500F 1/2 IN NPT D545714
MILLIPORE 01-0151-E 0-160/0-11BAR 2 IN 1/4 IN NPT PRESSURE GAUGE D574903
MILLIPORE 01-0122-F 0-160PSI 2 IN 1/4 IN NPT PRESSURE GAUGE D574905
MCDANIEL CONTROLS 0-100PSI 1/4 IN NPT PRESSURE GAUGE D574871
MILLIPORE 01-0122-F 0-160PSI 2 IN PRESSURE GAUGE D574933
ASHCROFT 35 1009 AW 02B 30IMV&30 0-30PSI 30-0IN-HG PRESSURE GAUGE D574666
TRERICE 700LFSS2502LA09?0 FLUID FILLED 0-30PSI 2-1/2IN PRESSURE GAUGE D542061
TRERICE 700LFSS2502BA09?0 FLUID 0-30PSI 1/4 IN NPT PRESSURE GAUGE D542057
TRERICE 52-2796 THERMOMETER 6 IN STEM 0-200F 5 IN 1/2 IN NPT D541893
ASHCROFT 25-1495-A-02B-3?-15 0-15PSI 2-1/2 IN 1/4 IN PRESSURE GAUGE D533395
ASHCROFT 35-1495-A-02B-3?-15 10075184-1 LOW 3-15PSI PRESSURE GAUGE D533807
NCG 100205-18 PRESSURE GAUGE 0-300PSI 1/4 IN NPT D545765
WIKA 213.40 8594210 -30-0IN-HG 4 IN 1/4 IN NPT PRESSURE GAUGE D566400
USG LIQUID FILLED PRESSURE GAUGE 0-30PSI 2-1/2 IN 1/4 IN NPT D574870
ASHCROFT PRESSURE GAUGE 0-100PSI 1/4 IN NPT D575047
ASHCROFT PRESSURE GAUGE 0-100PSI 1/4 IN NPT D575045
WIKA 213.40.100 8594210 -30-0IN-HG 1/4 IN NPT PRESSURE GAUGE D556536
AMETEK USG 0-30PSI SILICONE FILLED 1/2 IN NPT PRESSURE GAUGE D542406
NORGREN 18-013-214 0-30PSI 1-1/2 IN 1/8 IN NPT PRESSURE GAUGE D537896
ASHCROFT 35-1009-AW-02L-?600-XLL DURALIFE 0-600PSI 3-1/2 IN GAUGE D542125
ASHCROFT 10 1008 A 02B XFF 60 0-60PSI 100MM 1/4 IN PRESSURE GAUGE D537723
ASHCROFT 25W1005 K 02B XZC 200-AGQ 0-200PSI 2-1/2 IN PRESSURE GAUGE D537975
ASHCROFT C37 Q-8962 PRESSURE GAUGE 0-100PSI 2-1/2 IN 1/4 IN NPT D570558
ASHCROFT 25W1001TH 02B XUCZC 5000-ATF 0-5000PSI 2-1/2 IN GAUGE D537961
ASHCROFT 25W1005 H 02B XZC 200-AGQ 0-200PSI 2-1/2 IN PRESSURE GAUGE D537959
USG PI1 PRESSURE GAUGE -30-0-200PSI 2-1/4 IN 1/4 IN NPT D570568
USG PI5 PRESSURE GAUGE -30-0-200PSI 2-1/4 IN 1/4 IN NPT D570566
WIKA 232.34 XSEL 0-300PSI 4-1/2 IN 1/2 IN NPT PRESSURE GAUGE D566924
ASHCROFT 35W1001TH 02B 0-100PSI 1/4 IN NPT PRESSURE GAUGE D537611
ASHCROFT PRESSURE GAUGE 0-60PSI 3-1/2 IN 1/4 IN NPT D579310
ASHCROFT LIQUID FILL PRESSURE GAUGE 0-160PSI 3-1/2 IN 1/4 IN NPT D579309
USG 164490 0-160PSI 2 IN 1/4 IN NPT PRESSURE GAUGE D538077
廈門仲鑫達(dá)科技有限公司專注于AB,GE,施耐德等
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詞條說明
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