SS2000MD4M 都在找亿佳
在PLC控制系统中,电源占有极重要的地位。电网干扰串入PLC控制系统主要通过PLC系统的供电电源(如电源、I/O电源等)、变送器供电电源和与PLC系统具有直接电气连接的仪表供电电源等耦合进入的。现在,对于PLC系统供电的电源,一般都采用隔离性能较好电源,而对于变送器供电的电源和PLC系统有直接电气连接的仪表的供电电源,并没受到足够的重视,虽然采取了一定的隔离措施,但普遍还不够,主要是使用的隔离变压器分布参数大,抑制干扰能力差,经电源耦合而串入共模干扰、差模干扰。所以,对于变送器和共用信号仪表供电应选择分布电容小、抑制带大(如采用多次隔离和屏蔽及漏感技术)的配电器,以减少PLC系统的干扰。
位保证电网馈点不中断,可采用在线式不间断供电电源(UPS)供电,提高供电的安全可靠性。并且UPS还具有较强的干扰隔离性能,是一种PLC控制系统的理想电源。
2电缆选择的敖设
为了减少动力电缆辐射电磁干扰,尤其是变频装置馈电电缆。笔者在某工程中,采用了铜带铠装屏蔽电力电缆,从而降低了动力线生产的电磁干扰,该工程投产后取得了满意的效果。
上世纪60年代后期,根据当时汽车市场需求和计算技术的发展,在美国麻萨诸塞州Bedford的Bedford Associates,向美国汽车制造业提议开发一种Modular Digital Controller(MODICON)取代继电控制盘。其它一些公司也建议以计算机为基础的方案。其核心思想是采用软件编程方法代替继电控制的硬接线方式,并备有生产现场大量使用的输入传感器和输出执行器的接口,以便于进行大规模生产线的流程控制。这就是以后被称为Programmable Logic Controller的由来。MODICON 084是世界上种投入商业生产的PLC。
0年代是PLC崛起,首先在汽车工业获得大量应用,在其它产业部门也开始应用的时期。80年代是它走向成熟,全面采用微电子及微处理器技术;大量推广应用,并奠定其在工业控制中不可动摇地位的时期。在此阶段PLC销售始终以两位数百分点的速度增长,前六年的增长率超过35%,后四年稳定发展,年增长率约12%。90年代又开始了它的第三个发展时期。随着PLC的IEC 61131的正式颁布,推动了PLC在技术上发动新的突破:在系统体系结构上,从传统的单机向多和分布式及远程控制系统发展;在编程语言上,文本化和图形化的语言多样性,创造了更具表达控制要求、文字处理、通信能力的编程环境。
从应用范围和应用水平上,除了继续发展机械加工自动生产线的控制系统外,则是发展以PLC为基础的DCS系统、监控和数据采SCADA系统、柔性制造系统(FMS)、安全联锁保护(ESD)系统、运动控制系统等,全方位地产提高PLC的应用范围和水平。
进入90年代后期,由于用户对开放性的强烈要求和压力,由于信息技术的大力推动,PLC如果还停留在原有的专用而又封闭的系统概念上,它将坐以待毙。于是PLC进入了其发展的第四阶段。其特征是:
1 pcs Matrox SOL6M4AE Solios eA Image Ac Card PCIe x4 Interface
MATROX-REV-A
✅[3565] Matrox Meteor II Multi-Channel REV.B / Meteor ll Multi-Channel
**** TEST Matrox METEOR2-MC/4B 751-01 REV.A (by EMS or DHL)#j1688
1PC **** Test Matrox XMIO/12/8000L by EMS or DHL 90days Warranty #P7519 YL
-- 1PC MATROX GEN/PRO REV.A BOARD
1pc new MATROX METEOR2/4 ver.301
1PC NEW Matrox TripleHead2Go DP T2G-DP-MIF (DHL or EMS)*
1pc used Matrox VIO7IAOA/F Y
1pc used MATROX CORONA CORONA-LC / 4 / E 688-06 REV.A.
1pc used Matrox M9128 LP PCIe x16 M9128-E1024LAF DP
1pc used MATROX METE0R2-CL/32 7007-02 REV.A
1pc used MATROX ORI-AGP/RGB/C
1pc used Matrox P690 Plus LP PCIe x16 P69-MDDE256LAUF
1pc used MATROX Parhelia MGI PH-E128APV-VF
1pc used matrox SOL2MEVCLF
1pc used MATROX METEOR2 DIG64L* Y752-06
1pc used MATROX METEOR2-MC/4 Y751-04 REV.A
1pc used Matrox PH-A128R
1pc used Matrox SOL2MEVCLB Y7367-00 REV.B
1pc used MATROX YREV A SOL6MFCE visual data ac card
1pc used MATROX CRonOSPLUS REA-A
1pc used Matrox MGI P65-MDDA8X64F AGP Dual DVI
1pc used matrox SOL6MCL
1pc used MATROX Y7231-03 VI07ISAOSA
1pc used Matrox FREV A ETON ET866 professional graphics card
1pc used Matrox XMIO2/13/5000 capture card Y7291-02 REV.B
1pc used Matrox XMIO2/24/6000 YREV.A
1pcs Matrox SOL6MCL
1pcs Used Matrox SOL 2M EV CLB camera link full capture card SOL2MEVCLF
- 1x MATROX M9140-E512LAF M9140 LP PCIE X16 512MB GRAPHIC CARD @@@
- 1x MATROX M9140-E512LAF M9140 LP PCIE X16 512MB GRAPHIC CARD @@@
- 1x MATROX MGI EXPRESS VIDEO CARD
- 4x MATROX M9140-E512LAF M9140 LP PCIE X16 512MB GRAPHIC CARD @@@
- 4x MATROX M9140-E512LAF M9140 LP PCIE X16 512MB GRAPHIC CARD @@@
CCD CAMERA CARD Matrox MOR/VD 90 days warranty VIA DHL
CV-MTXR-50 CV-160/180 Digital File Cable f/ Matrox Card 50 Ft, OEM
Matrox 708-04 Rev A MGI MIL2P/4/HPC DVI VGA PCI Card
- Matrox 906-01 REV:A MGI G4+MDHA32G Dual VGA PORT AGP Video Card
- Matrox 906-01 REV:A MGI G4+MDHA32G Dual VGA PORT AGP Video Card
Matrox DSRVR/2/25/OUT NXIO202 Industrial Board
Matrox EWS-0CX256F Graphics Card Fan VCCI-A FEton ET866
MATROX F7105_0101 REV_D
MATROX F7105_0101 REV_D Multi-Monitor Graphics Card 128MB
MATROX G4+MDHA/32/0EM G450 DUAL MonITOR AGP GRAPHICS CARD 906-04
Matrox G45+ MDHA 16DLXB Dual VGA AGP Video Adapter Rev: A GRA 12
Matrox Meteor II METEOR2/4 Image Capture Card In Good Condition
Matrox Meteor II Meteor2-MC/4 frame Grabber Rev A
MATROX METEOR2/4 W/ JPEG/MJPEG 913-00 PCI frame Grabber Image Capture
Matrox PH-E128APVF Parhelia APVe 128MB DDR PCI-E x16 DVI Video Card
Matrox PH-P256F 256Mb Medical Graphics Card F
Matrox SOL 2M EV CLB camera link image collecting caard SOL2MEVCLB 95%new
Matrox SX-900/64-8/B2 Graphics Imaging Card
Matrox XMI02 YREV A XMI02/24/5000 adapter
MATROX YBOARD
-- Matrox Y751_0301 REV.B Board #2
Matrox YXMIO/AUD/CBL BREAKOUT CABLE DB25 Mal1 to 4 XLR Male and 2 XLR Female
Scorched Planet PC Game (1996) by Matrox (Disc Only)
Scorched Planet PC Game by Matrox 1996 Disc only
- VINTAGE VGA GRAPHICS CARD MATROX 834-00
XTOA-FESLPAF - Matrox Fiber Optic PCIe Interface Card
#87 Matrox 159-C06-06 STD-ALPHA Circuit Board
#87 Matrox 159-C06-06 STD-ALPHA Circuit Board
#SLS1C23 OIS 20 Card Matrox MOD=SX-900/64-81B2 #12269SY
#SLS1C23 OIS 20 Card Matrox MOD=SX-900/64-81B2 #12269SY
(1x) - MATROX - MGI G55MDDLP32DRF 32MB LOW PROFILE PCI New
(2 PIECE LOT) MGA-G200A-D2, MATROX MGA 2D, 3D, and video accelerator chip
(2x) Matrox DigiSuite DLITE/XLR/CBL Analog Audio Cable NEW & MFG PKG
(AP) TESTED! MATROX 618-02 REV A 2MB PCI VIDEO GRAPHICS CARD MGA-MYST FAST SHIP
(AP) TESTED! MATROX 618-02 REV A 2MB PCI VIDEO GRAPHICS CARD MGA-MYST FAST SHIP
(Set of 2) Matrox DualHead2Go D2G-A2A-IF & D2G-A2A (w/VGA,AC,USB) PwrOn-Untested
* Matrox Meteor II CompactPci frame Grabber
**BRAND NEW** MATROX 796-01 REV B G+/QUADP/CPQ
**BRAND NEW** MATROX 796-01 REV B G+/QUADP/CPQ
**USED matrox SOL6MCLBE Y7298-01 90days warranty Free DHL or EMS
**USED matrox SOL6MCLBE Y7298-01 90days warranty via DHL or EMS
**USED Industrial board Matrox M2/4B Meteor_II 750-03 REV.A 90days warranty #J1
**USED Industrial board Matrox M2/4B Meteor_II 750-03 REV.A 90days warranty #J1
**USED MATROX METEOR2-CL/32 REV.B 90days warranty Free DHL or EMS
**USED MATROX METEOR2-CL/32 REV.B 90days warranty via DHL or EMS
**USED Matrox MOR/2VD Video Card morphis y7142-03 warranty Free DHL or EMS
**USED Matrox MOR/2VD Video Card morphis y7142-03 warranty via DHL or EMS
**USED matrox SOL6MCLBE Ydays warranty
**USED matrox SOL6MCLBE Ydays warranty Free DHL or EMS
**USED matrox SOL6MCLBE Ydays warranty via DHL or EMS
**USED XCL/Matrox odyssey Hel5mdbcle Ydays warranty Free DHL or EMS
**USED XCL/Matrox odyssey Hel5mdbcle Ydays warranty via DHL or EMS
*1 YEAR Warranty* - Customized Service - Fast Shipping
*New* Matrox G4 MDHA32G AGP Video Card
*NICE* lot of (2) Matrox MX02LEMAX's, cables, & w/1 each Interface Card
*NICE* lot of (2) Matrox MX02LEMAX's, cables, & w/1 each Interface Card
*Recertified* Matrox Odyssey XCL O10G5MDBCL* YG5MDBCL* Warranty
:Matrox XMIO2/24/6000 PCI Express
[NOS] Matrox G450 MMS Multi Monitoruad Card G45X4QUAD-B 20pcs+ In Stock
[Used] MATROX / 7141_0001, CRonOSPLUS / CronosPlus, frame Grabber Card
[Used] MATROX / / CCD Camera Board, Rev A
[Used] MATROX / METEOR2/4, , Rev.301 / Meteor_II 750-03 Rev.A
[Used] MATROX / Y7621114 / CronosPlus, frame Grabber Card, 1pcs
[Used] Matrox / Y7142-03 // MOR/2VD/84, MORPHIS Rev A, 1pcs
[Used] matrox / Y7272-01 // MOR2VDE/84, MORPHIS Rev A, 1pcs
[Used] matrox / Y7281-00 MOR4VDE/84, MORPHIS Rev A, 1pcs #H
[Used] matrox / Y7281-00 // MOR4VDE/84, MORPHIS Rev A, 1pcs
[Used] matrox / Y7281-00 MOR4VDE/84, MORPHIS Rev A, 1pcs #H
[Used] MATROX // G2+/MSDP/8B/20 // MatroxMillenium G200SD 8MB PCI, 844-00 Rev.A
[Used] MATROX // IP-8/AT/2M // BOARD, Rev-A
[Used] MATROX // METEOR2/4 // Meteor_II Rev.A, 1pcs
[Used] MATROX // METEOR2-MC/4, / Multi Channel Card, Y751_0301 Rev.B
€ 193+iva Matrox m Maevex Decoder FULL HD AV-over-IP
€ 550+iva Matrox m Maevex Encoder Full HD AV-over-IP New Sealed
+ Matrox TV-Output HD15 (VGA) to Composite and 4-Pin S-Video
+ Matrox TV-Output HD15 to Composite and 4-Pin S-Video
✔️ MATROX M9140-E512LAF 512MB PCI-EX GRAPHIC CARD + CABLE LOW PROFILE UK SELLER
✔️ MATROX M9140-E512LAF 512MB PCI-EX GRAPHIC CARD onLY - LOW PROFILE - UK SELLER
✔ TESTED RETRO Matrox G450 32Mb PCI Videocard DVI VGA G45 32 G 45 FMDVP 32DBF
✅[3565] Matrox Meteor II Multi-Channel REV.B / Meteor ll Multi-Channel
✅[3840] Matrox Meteor II Multi-Channel Y751_0301 REV.B/Meteor 2
✅[4372] MATROX Meteol II MULTI-CHANNEL 751-01 REV A /