TB807 好货亿佳有
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。
FOXBORO N0148TR NO148TR, E1310-50MA, 2A8406 ASSEMBLY FORCE MOTOR DF
FOXBORO N0148SN PRESSURE TRANSMITTER REPLACEMENT PART D296501
FOXBORO N0143KF PRESSURE TRANSMITTER E11GM MODEL COIL B478715
FOXBORO N0143KF PRESSURE TRANSMITTER E11GM MODEL COIL B478714
FOXBORO N0142AF-E N0142AA PCB CIRCUIT BOARD D464872
FOXBORO N0142AA PCB CIRCUIT BOARD D464875
Foxboro MT Series Minox Thermocouple, MT-13UJIS-012
FOXBORO MODULE B0138RA-J M/821AL 823 827 4-20 MA
FOXBORO MODEL M 0-60PSI 6 IN 1/4 IN NPT PRESSURE GAUGE D482254
Foxboro model IGP10-TPHD1C-1L Cal. Range 0-300 psi Transmitter *SKU P9794*
FOXBORO MODEL C0134BX ConTROL UNIT
Foxboro Model 875PH-A1F-C PH/ORP Analyzer, 120VAC, 4-20mA, RS232C Port, LCD
Foxboro Model 873 pH ORP Analyzer
FOXBORO MODEL 12A TEMPERATURE TRANSMITTER 3-15PSI OUTPUT 0-100 DEG. F INPUT
FOXBORO MIRAN 1B2 PORTABLE AMBIENT AIR ANALYZER NOS MILITARY SURPLUS
Foxboro Magnetic Flowtube 9300A Series 9304A-SIBA
FOXBORO MAGNETIC FLOW TRANSMITTER 1891-SDSB-BP SIZE 1"
Foxboro M40G Pneumatic Output Gauge 84282
FOXBORO M12-A M12A TB-3B TEMPERATURE PROBE INPUT 75-125°F OUTPUT 3-15 PSI
FOXBORO M/40 INK PACKET TYPE 1800 F0104AR VIOLET BOX OF 6
FOXBORO M/40 INK PACKET TYPE 1800 F0104AP RED BOX OF 6
FOXBORO LOT OF 2 PRESSURE TRANSMITTER I/A SERIES IDP10-D47D21F-M1L1 (A7)
FOXBORO LO122CG L0122CG GREEN RECORDING PEN D415097
FOXBORO L0122DB BLUE RECORDING PEN DATA ACQUISITION AND RECORDERS D415074
FOXBORO L0121CU CIRCULAR CHART RECORDER FIBER TIP PENS
FOXBORO L0119EF POWER SUPPLY BOARD
FOXBORO L0117BS KEYPAD OPERATOR INTERFACE PANEL D358088
FOXBORO L0117BS KEYPAD D230846
FOXBORO K0147NZ ROUN D PC BOARD W/ SCREW TERMINALS (183-1)
FOXBORO IPI10-A21F 12.5-42V-DC 3-15PSI PRESSURE TRANSMITTER D451496
FOXBORO IPI10-A21F 12.5-42V-DC 3-15PSI PRESSURE TRANSMITTER D451410
FOXBORO IMT96-SEADB10M-A MAGEXPERT I/A SERIES 120V FLOW TRANSMITTER D372616
foxboro igp20-t22d21f-m1L1 pressure transmitter
Foxboro IGP20-T22D21F-M1L1 Intelligent Gauge Pressure Transmitter
FOXBORO IGP10-V22E1F PRESSURE TRANSMITTER
Foxboro IGP10-V22E1F Explosion Proof Pressure Gauge Transmitter 0-3000 psi
FOXBORO IGP10-DT2D10-L1 12.5-42V-DC 300PSI PRESSURE TRANSMITTER D387783
FOXBORO IGP10-DT2D10-L1 12.5-42V-DC 0-300PSI PRESSURE TRANSMITTER D432701
FOXBORO IGP10-DS3D1C-M1L1 I/A SERIES 0-300PSI PRESSURE TRANSMITTER B412549
FOXBORO IGP10-A22D1F 12.5-42V-DC PRESSURE TRANSMITTER D437339
FOXBORO IDP10-TS3C01F-M1L1T PSFPS-B2C01314D PRESSURE TRANSMITTER
FOXBORO IDP10-T20C21F-L1 12.5-42V 0-250IN-H2O PRESSURE TRANSMITTER D453759
Foxboro IDP10-I10C2IF-MI Pressure Transmitter w/ Mounting Hardware
Foxboro IDP10-I10C2IF-MI IDP10I10C2IFMI Pressure Transmitter 12.5-42.0 VDC
FOXBORO IDP10-DF1D01C-L1B2 12.5-42V-DC 0-275PSI PRESSURE TRANSMITTER B420138
FOXBORO IDP10-A22A21F TRANSMITTER VERIS VERABAR V510-10-H-M-F615C-IDP10
FOXBORO ICT SENSOR FOXBORO 1124-17S-A54-A 3000 PSI 4-20MA 0-3000 PSIS
FOXBORO ICP20-D20E21C-M1L1B2 0-3000PSI PRESSURE TRANSMITTER B431542
FOXBORO I/A SERIES VORTEX FLOWMETER INVENSYS MODEL 83
FOXBORO I/A SERIES PS400YG INPUT/OUTPUT MODULE REV 0S FBM6 (H4)
FOXBORO I/A SERIES P0950BM INTELLIGENT INTERFACE MODULE REV 0A HFBM 43 (GG2)
FOXBORO I/A SERIES P0700KN TERMINATION CABLE & TERMINAL BLOCK
FOXBORO I/A SERIES P0400YJ P0400YJ-0H PROCESSOR MODULE 120 VAC (WL44)
FOXBORO I/A SERIES ConDUCTIVITY (EC) TRANSMITTER 870ITEC-FYFAA-7 (220)
FOXBORO I/A SERIES CM400YR INPUT/OUTPUT MODULE REV 0A FBM15 (H4)
FOXBORO I/A SERIES CM400YH INPUT MODULE CM400YH-OA REV OF FBM7 (H4)
Foxboro I/A Series 8' Video Cable Assembly P0971FB
FOXBORO HUMITEX RECORDING CHART PAPER 818866 100 CHARTS
FOXBORO HUMITEX RECORDING CHART PAPER 798402 100 CHARTS
Foxboro Humitex Charts 898445-A approx. 100 24 Hour
Foxboro Humitex Charts 818003 approx. 100 24 Hour
Foxboro Humitex Charts 808743L approx. 100 24 Hour
Foxboro Humitex Charts 808427 approx. 100 24 Hour
FOXBORO HUMITEX CHART RECORDING PAPER 80A914 100 CHARTS
FOXBORO HP7E1-13-1/2-3A2 RTD SENSOR STAINLESS TEMPERATURE PROBE D284770
FOXBORO HART PRESSURE TRANSMITTER IGP10-TS3D1F-M2L1T PSISR-D23JSSS1SC14K
Foxboro Green Index Pointer M122MA
FOXBORO GLASS PH ELECTRODE KIT TI RYTON 22505
FOXBORO GHP-22491 PRESSURE ELEMENT GHP22491
Foxboro GCI0 Interconnect Cable P0970HT Rev E
FOXBORO GAUGE C1202 1/4" NPT 0-60 PSI P010YW 3 1/2" DIA 3-15 PSI
FOXBORO GAUGE BO13 8YM BO138YM 916339 0987 9163390987 0-4 PH 0-4PH
FOXBORO GAUGE 1/4" NPT 0-60 3-1/2" FACE 3-15 PSI 3-15PSI
FOXBORO G0116DR-E PWA TERMINATION PCB CIRCUIT BOARD D326077
FOXBORO G0114NK MOTOR
FOXBORO G0114BE-J ANALOG CARD PCB CIRCUIT BOARD D326067
FOXBORO G0114AW-F PWA DRIVER PCB CIRCUIT BOARD D326115
Foxboro G0110PD Power Fail Monitor 120 VAC 60 Hz
FOXBORO G0109NW CHART DRIVE 4W 24V-DC 2RPM SYNCHRonOUS 1RPH MOTOR B455394
FOXBORO G0109LA CHART DRIVE CASSETTE DATA ACQUISITION AND RECORDERS D326205
FOXBORO G0108KX ConSOTROL RECORDERS CHART DRIVE ASSEMBLY 24V-DC B457127
Foxboro FPS400-24 P0922YU I/A Series® system DIN Rail Mounted Power Supply
FOXBORO FCM10E P0914YM I/A COMMUNICATION MODULE 24V-DC 8W D432698
FOXBORO FBM204 Channel Isolated I/O Module
FOXBORO F104AR SET OF 5
FOXBORO F0109AA-B PCB CIRCUIT BOARD D507603
FOXBORO ELECTRonIC TRANSMITTER MODEL 843DP-H2I2SS-M
Foxboro Electronic Transmitter 841GX-DI1 071801102 12.5-36 V-DC
FOXBORO ELECTRonIC TRANSDUCER E11GM ST B
FOXBORO ELECTRonIC TRANSDUCER E11GM
FOXBORO ELECTRonIC PRESSURE TRANSMITTER W/ MANIFOLD FOXBORO IDP10-T22B21F
Foxboro Electrodeless Conductivity Sensor 1210TF-1
FOXBORO ELECTRO PNEUMATIC VALVE POSITIonER E69P-BI1V
FOXBORO ELECTRO PNEUMATIC VALVE POSITIonER E69P-BI1S
FOXBORO ELECTRO PNEUMATIC VALVE POSITIonER E69F-BI7
Foxboro EH4-D 4-slot Rack Shelf, Bracket Kit w/ Hardware, EH4D, SPEC200, 730
FOXBORO EBZG-H MOUNTING KIT REPLACEMENT PART D375866
FOXBORO E93-AK18US TEMPERATURE 30V-DC 0-2000F TRANSMITTER D337815
FOXBORO E83FA-06K1STFAA 6 IN 150 FLOW METER 10.5-50V-DC D473556
FOXBORO E69R-H2 CURRENT TO AIR ConVERTER E69RH2
FOXBORO E69R CURRENT TO AIR ConVERTER E69R-I2 IP ConVERTER 3-15 PSI
FOXBORO E69P-BI1Q CURRENT TO AIR 35 PSI 4-20MA POSITIonER B449781