1771-IQ16
1.概述
隨著科學技術(shù)的發(fā)展,PLC在工業(yè)控制中的應用越來越廣泛。PLC控制系統(tǒng)的可靠性直接影響到工業(yè)企業(yè)的安全生產(chǎn)和經(jīng)濟運行,系統(tǒng)的抗干擾能力是關(guān)系到整個系統(tǒng)可靠運行的關(guān)鍵。自動化系統(tǒng)中所使用的各種類型PLC,有的是集中安裝在控制室,有的是安裝在生產(chǎn)現(xiàn)場和各電機設(shè)備上,它們大多處在強電電路和強電設(shè)備所形成的惡劣電磁環(huán)境中。要提高PLC控制系統(tǒng)可靠性,設(shè)計人員只有預先了解各種干擾才能有效保證系統(tǒng)可靠運行。
2.電磁干擾源及對系統(tǒng)的干擾是什么?
影響PLC控制系統(tǒng)的干擾源于一般影響工業(yè)控制設(shè)備的干擾源一樣,大都產(chǎn)生在電流或電壓劇烈變化的部位,這些電荷劇烈移動的部位就是噪聲源,即干擾源。
干擾類型通常按干擾產(chǎn)生的原因、噪聲的干擾模式和噪聲的波形性質(zhì)的不同劃分。其中:按噪聲產(chǎn)生的原因不同,分為放電噪聲、浪涌噪聲、高頻振蕩噪聲等;按噪聲的波形、性質(zhì)不同,分為持續(xù)噪聲、偶發(fā)噪聲等;按聲音干擾模式不同,分為共模干擾和差模干擾。共模干擾和差模干擾是一種比較常用的分類方法。共模干擾是信號對地面的電位差,主要由電網(wǎng)串入、地電位差及空間電磁輻射在信號線上感應的共態(tài)(同方向)電壓送加所形成。共模電壓有時較大,特別是采用隔離性能差的電器供電室,變送器輸出信號的共模電壓普遍較高,有的可高達130V以上。共模電壓通過不對稱電路可轉(zhuǎn)換成差模電壓,直接影響測控信號,造成元器件損壞(這就是一些系統(tǒng)I/O模件損壞率較高的原因),這種共模干擾可為直流、亦可為交流。差模干擾是指用于信號兩極間得干擾電壓,主要由空間電磁場在信號間耦合感應及由不平衡電路轉(zhuǎn)換共模干擾所形成的電壓,這種讓直接疊加在信號上,直接影響測量與控制精度。
GP2501-SC11
40047906-P2A
MCF41A0110-203-4-0T 08274681
MCS41A0075-2A3-4-00 08270929
PCI-5911
CACRSR15BB1AMY114
GeneralT9961
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DSCA114
TAS5200
YB161102-AD
N0811QTDB
D-69457-A
NSRB4001
Power Supply Mode
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SDN-DR
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CS1W-DRM21-V1
Module YW512U
M3545-5
CL7011X1 49A1166
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DX112-2-2
15-591-7
MDI3CRD23C7
DRS23040
RK-16N 0295899
ERO112000600
NPSO-1203L
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RS232 PC
SW-LNET-195
E1151
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D4-8626
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SP-600T
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CLX1-D4U6
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MCV41A0750-503-4-00 8269416
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NL-552
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0020-10704
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SGDH-50DE
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XVME-490
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57402-D
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OEM675T
MF X32 6E
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MCV41A0450-503-4-0T
PS-22-4-9-13/16-FC/APC
STBNIP2212
G3B8-22L
CIMRG7U40371
XBTGT4230
UGFSEM-A7LMG12X
Tyco-3PH 35-IV
MCH42A0030-5A3-4-0T 08271607
PNOZMI1P/773400
E60-2470-1
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GP-410
MOD225A-159
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DDS2.1-W015-D
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XVME-200/1
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SPCONV10A
JRMSI-MB20
TRICONEX 2651-100
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R10A1
MVME162-333
MVME2700761IO
CSA200-30
MGPL12-DCG4945G-25
E8YERS
XBTZGPDP
SAF511
MAC112D-0-HD-4-C/130-A-
070-178600
LQD-421
YB-706
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FC-SD70-U05
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JZNC-YIU01-E
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TDM32-20
CUB4LP40
MMB75U-1MMB75U-1
ELECTRO-PNEUMAT?IC
R-IB IL AI 2
E7BVA009
JANCD-JCP01-4
HE300IBS100G
MCS40A0220-503-4-0T 08275262
PA-0612-000
182762B-01
UPSA2000
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01483-4014-000-?11
TT-2043-1011-B
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Digiplan PKC
MAC112C-D-FD
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HP5061B
LS176C
MV104-1-2-1S
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GP2300-TC41-24V
SEW MDX61B0015-5A3-4-0T
RGASKETX312
MPS-30
RK2AHL071 1
SGMG-05A2AB
PLC DPR 950 DPR95
WT24-2B440
M907-100M907100
TT-4203-4015-A
D662-4348K
MVM3461D
SM312FP
HMD01.1N-W0036
TS5204N300TS5204N300
TC-OAV061
MCH42A0300-503-4-0T 08271674
Xycom XVME-566
SGMGH-55A2A-YR12
DSMC110
TC-FTB3T1
YT212001-AB
PCI-1112
MR-J2S-10A
EE-4696-212-012
R190415210
PZE474210
PSENCSC/540322
NIPCI-6052E
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JACP-317800TK-IAH061
SGMS-10V6DB
Kreativ 2000 Kurin
TCC080EF-REP-KI?T-CPVC
0190-B4120
CMDS-015
2-EB10R-LPT8?35
LKEB-2022--LKEB-2022
MM-PMS9-00
HD115A6-40T
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KDN-12-100-220
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vipa 323-1B
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PC-200
OP15 6AV3515-1MA1
LPSE-2H0
SGMP-01A316
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LIBC1E10
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C1MR-V7CU45P5
54-120356Z
INTERFACE 32E
TC-FFIF01
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U4430141V10 RM-20
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DKC10
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3300-08220
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CACR-PR01AD4NRY5
J402-522
FECP02
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WL27-3P1122
UM858 68843
TSXT3170
PXI-8184
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VLT2815
E4809-770-031
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K10AU-5 SWITCHING
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MKD071B-061-GP0-KN
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TS6214N530
JAMSC-C8
IBST24AI4/SF4
MCV41A0037-2A3-4-0008269440
GPD333-DS042
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JANCD-MM14C
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0020-51113