AS-W808-006 无线通讯

AS-W808-006 无线通讯

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：

BALLUFF 240VOLTS 6A 1/2"NPT LIMIT SWITCH BNS113-B6-L1261-A-22-06 *     *

BALLUFF 24V 5M INDUCTIVE DATA COUPLER, BIC 1I0-P2001-M12MM1-BPX03-050

BALLUFF 24VAC 6A LIMIT SWITCH, 783381 / BNS-113-B06-L12-61-A-22-06 *     *

BALLUFF 24VDC 200MA MAX SHARP SHOOTER MODULE BVS-OI-3-001-E *NIB*

BALLUFF 250V 6A LIMIT SWITCH, BNS 819-D04-R12-100-10-FD *     *

BALLUFF 3 PDL FOOTSW RED SNAP ACTION 6NC-6NO NO SHROUD FITTED

Balluff 311913 Mini Photoelectric Sensor BMOA-66RM-X63-R1

BALLUFF 312736,      

BALLUFF 35-250VAC 3 PIN PROXIMITY SWITCH BES 515-449-S21-L

Balluff 4-Pin Connector Cable BCC05M7 (lot of 117)      

BALLUFF 508824   508824

BALLUFF 509052   509052

Balluff 516-114-SA1-05, 904742

BALLUFF 516-215-E5-E-S5 PROXIMITY SWITCH 220-250V *      *

Balluff 516-300-S135-S4-D Induktiver Näherungsschalter

Balluff 516-324-EO-C-03/151993 Inductive Proximity Sensor 10-30VDC !       !

Balluff 516-325-BO-C-03/552526 Inductive Proximity Sensor 10-30VDC !       !

Balluff 516-325-E4-C-05/117103 Inductive Proximity Sensor 12-24VDC !       !

BALLUFF 51G6045A3.5    51G6045A35

BALLUFF 543-B02-D16-61-16-10 LIMIT SWTICH 250VAC 6A

BALLUFF 551940 INDUCTIVE SENSOR 10-30VDC 200MA SN=2MM,      

BALLUFF 55350B FIBER OPTIC CABLE NIB

BALLUFF 6 Position Limit Switch BNS 519-C6 D12-100-11 _ BNS519C6D1210011

BALLUFF 6360-2-10-30-5000-65 *      *

Balluff 63M - LA04 - S115 Sensors

BALLUFF 6A, 240V LIMIT SWITCH BNS 813-B02-L12-61-A-22-02 *     *

Balluff 6-f. Grenztaster BNS 819-X492-D6-L12-100-10-FD

BALLUFF 708069     708069

Balluff 819-D04-100-10 Limit Switch

Balluff 819-D04-D12-100-10 Limit Switch

Balluff 8NS-113-FK-60-183 Capacitive Sensor

BALLUFF 8-POLE SAFETY SWITCH, BNS 813-B02-L12-61-A22-02-C093

BALLUFF 8-POLE SAFETY SWITCH, BNS 813-B02-L12-61-A22-02-C093 *     *

BALLUFF 90-250VAC PROXIMITY SENSOR BES 516-410

BALLUFF 90-250VAC PROXIMITY SENSOR BES 516-410 *     *

BALLUFF 999991 - PACK OF 10 - CLAMPING CUFF FOR PROXIMITY SWITCH,      

BALLUFF 999994 - PACK OF 6 - CLAMPING CUFF FOR INDUCTIVE SENSOR,      

Balluff Absolute Encoder BRGD2-WCD0B-EP-P-R-K 783628

Balluff Adapter Cable BKS-S32-S50       #17449

BALLUFF ALUMINUM 79" CAM TRAY BNL5310-120-6-2000

Balluff Analog Amplifier BTA-A11 BTA-A11-2450

BALLUFF ANALOG PROXIMITY SWITCH MODEL BAWM18ME-UAC50B-BP00-GS04

Balluff Analog Schaltgerät BES 516-611-A-1 #AS-H02

Balluff Analog Unit BTA-E10-0500-E BTAE100500E BTA-E

Balluff Analog Unit BTL BTA-C17-0250

Balluff Analog-Schaltgerät BES 516-611-A-1

Balluff Angel Sensor BWL 5454D-L011-S49 WITH CABLE

Balluff Angel Sensor BWL 6868D-L012-S49 WITH CABLE

Balluff Auswerteeinheit BIS C-6002-028/ BIS C-650

BALLUFF Auswerteeinheit BIS C-6022-019-050-03-ST10

BALLUFF Auswerteeinheit BIS C-6022-028-050-03-ST10

Balluff Auswerteeinheit BIS C-650

BALLUFF Auswerteeinheit BIS L-6002-019-050-03-ST11

Balluff Auswerteeinheit BISC60000765000KL1 BIS008U Automation original NEU

BALLUFF AUSWERTEEINHEIT BKS-S 44-00 / BIS F-402 -OVP-

Balluff Auswerteeinheit Processor BIS009A Neu/      OVP

Balluff Auswerteeinheit Processor BIS009A Neu/      OVP Siegel gebr.

BALLUFF B0S 12M-PS-1PD-S4-C 10-30 VDC 4-PIN PHOTOELECTRIC SENSORS, LOT OF 2

BALLUFF B0S 18M-NS-1XB-E4-C *      OUT OF A BOX*

Balluff B0S 18M-PA-1QB Photoelectric Sensor

BALLUFF B0S 18-NS- 1XB -E4-C-03

BALLUFF B0S 5K-P0-IX10-S75 PHOTOELECTRIC SENSOR

Balluff B0S01CT, B0S18M-PUD-PR30-S4, B0S18MPUDPR30S4, NNB, Shipsameday #1328V

BALLUFF B0S18K-PS-1LOC-E5-C-S4 *      IN THE BOX*

Balluff B0S-18M-P01RB-S4-C Sensor

Balluff B0S18MPA-LD10-S4 Photo electric sensor

BALLUFF B0S18M-PS-1XA-E4-C-03 *      IN FACTORY BAG*

Balluff B0S18M-WS-7XB-BO-L Proximity Switch 20-250Vac-200mA, 3m Cable -      

BALLUFF B0S-18-PS-1-XB     B0S18PS1XB

BALLUFF B0S-18-PS-1-XB    B0S18PS1XB

Balluff B0S26K-PA-1LHB-S4C Photo electric sensor

Balluff B0S26K-PA-1LHC-S4C Proximity Switch

Balluff B0S26K-PA-1LHC-S4C Proximity Switch

BALLUFF B0S65K5C200T1   B0S65K5C200T1

Balluff B0SM18KMS-PCS80G-S04G Captive Proximity sensor

BALLUFF B3-D12-61-12 LIMIT SWITCH ***XLNT***

BALLUFF B5ES 516-215-S21-EL-W    B5ES516215S21ELW

Balluff BAE LX-VS-DR090 Vision Beleuchtung BAE00AM Dunkelfeld-Beleuchtung

Balluff BAE LX-VS-RI100 Vision Beleuchtung BAE000K Ring-Beleuchtung NEU/ OVP

Balluff BAE LX-XO-PL018-L1-S Laser Lasermodul fokussierbar BAE00KE NEU OVP

Balluff BAE PS-XA-1W-24-100-004 Schaltnetzgerät BAE0002 Netzgerät Netzteil

Balluff BAE0002 BAE PS-XA-1W-24-100-004 115/230 VAC input 24 VDC 10A output

BALLUFF BAE0004 BAE PS-XA-1W-24-012-002 -un      /OVP-

BALLUFF BAE0005    BAE0005

BALLUFF BAE000A POWER SUPPLY

BALLUFF BAE00AH, PHOTOELECTRIC SENSOR, MINI,      

Balluff BAE00AK BMO A01 J PU C 02 Photoelectric Amplifier Sensor Switch

Balluff BAE00AK BMO-A01-J-PU-C-02 Photoelctric Amplifier Sensor Switch

BALLUFF BAE-PS-XA-3Y-24-100-006   BAEPSXA3Y2410000

Balluff BAM OF-VS-001-D-RX Optischer Filter BAM01A7 Streuscheibe NEU/ OVP

BALLUFF BAM00HR BUNKER BLOCK II WITHOUT POSITIVE STOP, DIAMETER:,      

Balluff BARTEC 17-5923-2512 / BES-516607 Proximity Amplifier Relay NIB

BALLUFF BAS S-002 MX-PO-S 49-ADT BASS002MXPOS49ADT

Balluff BASN-001, 8156 Bus Sensor (ELE4374)

BALLUFF BAW 030-PF-1-K-03 Näherungsschalter -      -

BALLUFF BAW M12MI-UAC20B-S04G Analog Proximity *      Sealed*

Balluff BAW M18ME-UAC50B-BP00-GS04 115571 Inductive Sensor

BALLUFF BAW M18MI2-UAC Inductive Analog Sensor

Balluff BAW M18MI-UAC50B-S04G Proximity Sensor

BALLUFF BAW0010      BAW0010

Balluff BAW002K Proximity Sensor - BAW M18MI-UAC50B-S04G -       in Box

BALLUFF BAW002M     BAW002M

Balluff BAW-018-PB-1-K-03 Proximity Switch BAW018PB1K03 -       No Box

BALLUFF BAW018-PF-1-K-05     BAW018PF1K05

BALLUFF BAW-030-PB-1-K-03     BAW030PB1K03

BALLUFF BAW-030-PB-1-K-05     BAW030PB1K05

Balluff BAW-030-PB-1-K-5, BAW030PB1K5 Proximity Sensor -      

Balluff BAWG06EE-UAF20B-EP03-K Proximity Switch      

BALLUFF BAW-M08EI-UAD15B-BP03   BAWM08EIUAD15BB1

Balluff BAWM18ME-UAC50B-S04G BAW Analog Proximity Switch

BALLUFF BAW-M18ME-UAC50B-S04G      BAWM18MEUAC50BS0

Balluff BAW-M18MG-UAC80F-S04G Analog Proximity Switch 8mm Range ! WOW !

BALLUFF BAWM18MGUAC80FSO4G **NNB**

BALLUFF BAW-M18MI-IAC S0B-S04G *      OUT OF A BOX*

BALLUFF BAW-M18ML-UAD80F-S04G *      IN FACTORY BAG*

BALLUFF BAWM18ML-UAD80F-S04G     BAWM18MLUAD80FS0

BALLUFF BAW-M30ME-UAC10B-S04G    BAWM30MEUAC10BS0

BALLUFF BAW-MKZ-471.19-S4   BAWMKZ47119S4

BALLUFF BC5T-1202-D-US     BC5T1202DUS

BALLUFF BC5T-1805D-US INDUCTIVE PROXIMITY SWITCH, 10-30VDC, 4-100MA

BALLUFF BC5T-1805D-US INDUCTIVE PROXIMITY SWITCH, 10-30VDC, 4-100MA, SEE DESC

BALLUFF BC5T-1805D-US   BC5T1805DUS

BALLUFF BC5T-3010D-US INDUCTIVE PROXIMITY SWITCH, 10-30VDC, 4-100MA

BALLUFF BCC A314-A314-30-346- CABLE, 10METERS, 16AWG, MALE/F,      

BALLUFF BCC A315-A315-30-330-VS85N5-120 CONNECTOR/CABLE 5 POLE,      

BALLUFF BCC A315-A315-30-330-VS85N5-150 5 POLE CORDSET DOUBLE ENDED,      

BALLUFF BCC A315-A315-30-330-VS85N5-150 5 POLE CORDSET DOUBLE ENDED,      *

BALLUFF BCC A315-A315-30-330-VS85N6-050 CORDSET 5P M/F ST/ST 5M,      

BALLUFF BCC A354-0000-10-RN010-050 -PACK OF 4- CORDSET 16FT-9IN 600V,      

BALLUFF BCC A418-A418-70-359- BCC0A47 - CONNECTIVITY PRODUCTS

BALLUFF BCC M414-E814-BG-RM013-000, CONNECTOR, ADAPTER,      

BALLUFF BCC M414-E834-AG-RP001-020 CONNECTOR CABLE 4P F ST TO ETHERNET,      

Balluff BCC M41C-0000-1A-049-PX0C25-050, ShipSameDay W/2-3 Days Shipping#1608A38

BALLUFF BCC M62C-0000-10-065-PX0BP4-100 90 DEG SINGLE ENDED FEMALE,      *

BALLUFF BCC00R9 , CONNECTOR CABLE 8 PIN BIS Z-501-PU1-05/E,      

BALLUFF BCC00R9 , CONNECTOR CABLE 8 PIN BIS Z-501-PU1-05/E,      *

BALLUFF BCC00RF CONNECTION CABLE 8 POLE FEMALE STRAIGHT 20 METERS SING,      

BALLUFF BCC00RJ CONNECTION CABLE RFID,      

BALLUFF BCC00RU CONNECTION CABLE RFID 10 METERS,      

BALLUFF BCC017Z - PACK OF 10 - 80 IN. FEMALE 9 POLE CORDSET,