Description

P0926MX FOXBORO

来自信号线引入的干扰

与PLC控制系统连接的各类信号传输线，除了传输有效的各类之外，总会有外部干扰信号侵入。此干扰主要有两种途径：一是通过变送器供电电源或共用信号仪表的供电电源串入的电网干扰，这往往被忽视；二是信号线受空间电磁辐射感应的干扰，即信号线上的外部感应干扰，这是很严重的。由信号引入干扰会引起I/O信号工作异常和测量精度大大降低，严重时将引起元器件损伤。对于隔离能差的系统，还将导致信号间互相干扰，引起共地系统总线回流，造成逻辑数据变化、误动和死机。PLC控制系统因信号引入干扰造成I/O模件损坏数相当严重，由此引起系统故障的情况也很多。

BOX OF 5 COOPER BUSSMANN FUSETRON FUSES FRN-2-8/10

BANNER FX1-O-LM4-2 MULTI-BEAM SCANNER BLOCK ASSEMB

BANNER 27189 POWER BLOCK 27189

LOT OF 20 COOPER BUSSMANN BUSS FUSES MDL-3 MDL3

GENERAL ELECTRIC CR104PSG32B91NE​W SELECTOR SWITCH

BANNER ENGINEERING MODEL MRB-L RELAY BOARD W/O TRA

GENERAL ELECTRIC CR104PBG01R2 PUSH BUTTON

BANNER ENGINEERING LR-400-NO BOX PHOTOELECTRIC SENS

MARTIN SPROCKET QD BUSHING SH-1-3/8 SH138

DODGE TAPER LOCK BUSHING 2517 X 1-1/4 KW 2517X114KW

LOT OF 2 CTD DOUBLE END FLUTES CTD NO.5 SURPLUS CT

LOT OF 14 PANDUIT COPPER LUGS ONE HOLE STANDARD BARREL

LOT OF 4 MURRELEKTRONIK 26331 RCV-3TF SUPPRESSORS 2

KOGANEI KSHJ10X10-02 SHOCK ABSORBER KSHJ10X1002

BOX OF 4 COOPER BUSSMANN FUSETRON FUSES FNM-1-1/4 F

LOT OF 2 CTD DOUBLE END FLUTES CTD NO.5 SURPLUS CT

LOT OF 14 PANDUIT COPPER LUGS ONE HOLE STANDARD BARREL

LOT OF 4 MURRELEKTRONIK 26331 RCV-3TF SUPPRESSORS 2

KOGANEI KSHJ10X10-02 SHOCK ABSORBER KSHJ10X1002

BOX OF 4 COOPER BUSSMANN FUSETRON FUSES FNM-1-1/4 F

BOX OF 4 FERRAZ GOULD SHAWMUT TRI-ONIC FUSES TRM-3

LOT OF 4 GOULD SHAWMUT TRI-ONIC FUSES TRS-20-R TRS2

ALLEN BRADLEY CABLE 1771-CP1 1771CP1

SPEEDAIRE 1/4″AIR LINE FILTER 4ZL08 4ZL08

SPEEDAIRE KIT-BOWL 1AKG5 1AKG5

HUBBELL 30A 250V 3 PHASE TWIST-LOCK CONNECTOR

GE T8 BALLAST G2-RN-T8/HO-8FT​-120 G2RNT8HO8FT120

MCI 4-06-8643 TRANSFORMER 4068643

DAYTON 4WT40 30 CFM AC AXIAL FAN 4WT40

WATLOW FIREROD J11A-6670 240V 500W CARTRIDGE HEATER

THERMO-TECH H11Z10F T2J 240V 500W CARTRIDGE HEATER

BUSSMANN FRS-R-1/2 LOT OF 7 FRSR12

BUSSMANN FRS-R-9 LOT OF 4 FRSR9

WATLOW FIREROD 0223 J3A-6671 240V 125W CARTRIDGE HE