140DDM39000

140DDM39000

2 抗干扰的技术对策分析

为防止干扰，可采用硬件和软件的抗干扰措施，其中，硬件抗干扰是zui基本和zui重要的抗干扰措施，一般从抗和防两方面入手来抑制和消除干扰源，切断干扰对系统的耦合通道，降低系统对干扰信号的敏感性。

2.1 电源系统引入的干扰
电网的干扰，频率的波动，将直接影响到PLC系统的可靠性与稳定性。如何抑制电源系统的干扰是提高PLC的抗干扰性能的主要环节。

(1) 加装滤波、隔离、屏蔽、开关稳压电源系统。
设置滤波器的作用是为了抑制干扰信号从电源线传导到系统中，使用隔离变压器，必须注意:屏蔽层要良好接地;次级连接线要使用双绕线(减少电线间的干扰)，隔离变压器的初级绕组和次级绕组应分别加屏蔽层，初级的屏蔽层接交流电网的零线;次级的屏蔽层和初级间屏蔽层接直流端。

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现货，现货，降降降，火火火，火火火……

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HONEYWELL 981093 LONGFELLOW II LINEAR POSITION TRANSDUC

PROPORTION-AIR SJ01450-A03 PNEUMATIC VALVE, NNB

ALLEN BRADLEY 1336 PLUS 2HP AC DRIVE 1336S-BRF20-AN-EN5

MODICON BPH0953N5AA2CA2 AC SERVO MOTOR 4540 RPM 3PHASE 

MARATHON ELECTRIC 056T17F5348B, BRAKE MOTOR, 3 PH, FR 5

CONTROL-O-MATION D1085.B 115 VAC POWER SUPPLY

POTTER VSR-FEX, VANE TYPE WATERFLOW ALARM, 450 PSI, 1/2

HILTI 00333237, CLEVIS STANDARD DUTY, 1" HANGER, LOT OF

SCHNEIDER TSX QUANTUM RTD INPUT MODULE 140 ARI 030 10 /

LINCOLN MOTORS SRN4H0.5T61 ENCLOSED MOTOR, 56-65 FR, 0.

EXAC SERIES 8300 MASS FLOW TRANSMITTER 8300EX

ROTOR TOOL EMR225RAYGG44M ?" DRIVE ANGLED NUTRUNNER ELE

KEMKRAFT KEI-312 INCLINOMETER READOUT STEERING WHEEL AN

NUMATICS 115-120V .17A 50/60HZ PNEUMATIC SOLENOID VALVE

RADIUS 4-20MA 20-100PSI ELECTRO PNEUMATIC ROTARY POSITI

HONEYWELL DT-2RV-A7 STANDARD BASIC SWITCH, LOT OF 10, N

SMARTEYE SP1054/01-1 SENDER / RECEIVER READER, NNB

TRIAD CONTROLS MG-16-0F-AU 120 VAC 60 HERTZ LIGHT CURTA

FORCE CONTROL INDUSTRIES T3-119-H280B22 BREAK / CLUTCH

OMRON STI AF027025 UM5-4824 74005-4824 UNIVERSAL SAFETY

FERGUSON CAMCO R400 GEAR INDEXER W/ FERGUSON PICOMATIC

FERGUSON CAMCO R440 GEAR INDEXER W/ RL60, RATIO 40:1

PALL HJ8670D20KPTBT SERIES 8670 / 71 DUPLEX FILTER, NNB

A660-2005-T544 RP1 STANDARD B-CABLE, 14 M, 46 Pin MALE/

FANUC XGMF-13658 A660-4003-T846#L14R53 RM2 CE/RIA B-CAB

FANUC A660-8006-T955 / L14R53 SERVO ROBOT CABLE, 7 PIN 

FANUC EE 3066 112 004 INTER CONNECT CABLE ASSEMBLY, 9 P

FANUC EE 4707 182 021 INTER CONNECT CABLE ASSEMBLY, 42 

FANUC EE 3067 115 004 OPMR PURGE / BATT / OTCBL 33 MCA

FANUC A660-2004-T722 / L20R33 RP1 STANDARD B-CABLE, 20

FERGUSON CAMCO R400 GEAR INDEXER

INGERSOLL RAND DAA40N3S6 3/8" PNEUMATIC ANGLE WRENCH

INGERSOLL RAND DAA35N3S6 3/8" PNEUMATIC ANGLE WRENCH

ALLEN BRADLEY 1745-LP153 Series C FRN 6 Programmable Co

FANUC A06B-0128-B175 a6 / 3000 AC SERVO MOTOR *DAMAGED

duMONT #40A MINUTE MAN AMERICAN STANDARD BROACH SET

duMONT #40 MINUTE MAN AMERICAN STANDARD BROACH SET

SEW EURODRIVE S80DT100LS4B HELICAL-WORM GEAR MOTOR, RAT

TRIAD CONTROLS MG-36-OF-AU LIGHT CURTAIN TRANSMITTER

GOULD BOS14352 VACU-BREAK SWITCH BUSWAY PLUG 60 A, 600 

INDRAMAT TVM 2.1-050-W1-115V AC SERVO POWER SUPPLY