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第二类是来自信号线引入的干扰。此干扰主要有两种信息途径: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，这种干扰往往非常严重。
由信号引入的干扰会引起I/0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。对于隔离性能差的系统，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。此种干扰经常发生于信号距离长的龙门吊上，常采用加中继隔离的方法，来屏蔽掉感应电压，解决干扰问题。BRAD HARRISON 41311 600V 8A 5 PIN MINI ConNECTOR NEW
TPC WIRE & CABLE 84700 SUPER-TREX QUICK-ConNECT FEMALE RECEPTACLE CABLE 48" LEAD
BRAD HARRISON QUICK-DISConNECT SYSTEMS MIRCO-CHANGE MOLDED ConNECTOR 80256
15 new Siemens 3SB3 901-0AB Contact block adaptors
TPC WIRE & CABLE P/N 84300 SUPER-TREX MINI QUICK 3 POLE MALE RECEPTACLE
NEW HUBBELL HBL5666C 2POLE 3WIRE 15A AMP 250V-AC TWIST-LOCK PLUG
HUBBELL HBL5261 NEW 15A 125V OUTLET HBL5261
*NEW* WESTINGHOUSE FH47 OVERLOAD RELAY
ALLEN BRADLEY 77135-146-52 MEMORY CARD RETAINER KIT
Phoenix Contact KGS-MSTB2.5/15 KGSMSTB2515 Cable Housing
Allen Bradley 1771-CP1 Power Supply Cable
MODICON 170-XTS-042-00 170TS04200 MOMENTUM
PEPPERL + FUCHS SAFETY BARRIER RELAY KHA6-RW1/EX1
HUBBELL GFR5252IA 15AMP GROUND FAULT DUPLEX RECEP
LOT OF 2 NEW GENERAL ELECTRIC OVERLOAD THERMAL HEATER CR123F35.7B CR123F357B
LOT OF 2 NEW GENERAL ELECTRIC OVERLOAD THERMAL HEATER CR123F48.7B CR123F487B
Allen Bradley 800H-AK1A Series A Flush Head Green Push Button
ALLEN BRADLEY 1770XT CHANNEL TERMINATOR I/O MODULE
*LOT OF 2* ALLEN BRADLEY 1746-RL45 OCTAL LABEL KIT FOR 1746-IV16 INPUT MODULE
ALLEN BRADLEY 77131-015-51 HARDWARE KIT FOR 2711 PANELVIEW 300 & 550
PILZ PN12-PNP PROXIMITY SENSOR PN12PNP 13-27V-
1 NEW SIEMENS 3SB3-400-0E 3SB34000E ConTACT BLOCK 2 N.C.
HUBBELL ConNECTOR HBL 9350 30A 250V
ASHCROFT 20W1005 H 01B 30PSI 2" 1/8 NPT BLACK
ASHCROFT 20W1005 H 02B 60PSI 2" 1/4 NPT BLACK
ASHCROFT 20W1005 H 02L 60PSI 2" 1/4 NPT LOWER
Hubbell IG5262 , Isolated Ground Receptacle, 15A-125VAC, Orange, Duplex
ALLEN BRADLEY 1746-RL51 OCTAL LABEL KIT FOR 1746-OB16 1746RL51
TELEMECANIQUE COIL SUPPRESSOR MODULE LA4 DA2U 110-240V AC LA4DA2U
ALLEN-BRADLEY 1336E-BX060-AN-EN AC DRIVE 60 HP
SIEMENS SINAMICS ACTIVE LINE MODULE 6SL3130-7TE31-2AA3
SIEMENS SINGLE MOTOR MODULE 6SL3120-1TE24-5AA3 SIEMENS
SIEMENS COMMON RECTIFIER 6SE7028-6EC85-0AA0 SIMOVERT P
SIEMENS DC INVERTER 6SE7023-4TC61 SIMOVERT VC
SIEMENS SINGLE MOTOR MODULE 6SL3120-1TE24-5AA3
SIEMENS 1FT6084-1AF71-4AG1 SERVOMOTOR
Siemens Simatic PLC 555-1106, 505-6660, 505-CP2572, 505-CP1434TF, 505-4532,
ALLEN-BRADLEY 30HP AC DRIVE 1336S-B030-AN-EN-L6 SER. D 460V 3PH 36KVA
SIEMENS MICROMASTER 430 45KW 87A 6SE6430-2UD34-5EA0 DRIVE
Allen Bradley 1336F-B020-AA-EN Plus II Drive 20 HP 1201-HCS2
Allen Bradley 1336F-B020-AA-EN Plus II Drive 20 HP
Allen Bradley 1336F-B020-AA-EN-L6 Plus II Drive 20 HP
FINCOR DC ADJUSTABLE SPEED DRIVE 150 HP 3123M SIX-SCR DC MOTOR CONTROL
*NEW* SIEMENS SERVOMOTOR 1FT6041-4AF71-4FB1
ROSEMOUNT 8712CR12N0 SMART FAMILY MAGNETIC FLOW TRANSMITTER *NEW*
HEIDENHAIN RON 705 B 18000 Incremental Hollow Shaft Rotary Encoder
ALLEN BRADLEY 1336 Impact Force 15HP AC DRIVE 1336E-B015-AN-EN-HA2
FISHER ConTROLS 32.24177SVF VALVE 1/2" STAINLESS DVC2000 W/ PRESSURE REGULATOR
Asco Red-Hat II 3/8" Solenoid Valve 8263G333 120V
ASCO EF8263G206 VALVE SOLENOID VALVE 3/8" PIPE 100 PSI EF8263G 206 COIL 120V
ASCO RED HAT II SOLENOID VALVE L8262G90
TPC WIRE & CABLE 84700 SUPER-TREX QUICK-ConNECT FEMALE RECEPTACLE CABLE 48" LEAD
3/8" PortFluid Control Solenoid Valve 3-Way 180 PSI Parker 75332BN3RN00
PARKER SKINNER SOLENOID VALVE 73222BN3SN00N0H111B6
SIEMENS STACK LIGHT 8WD4 308-0AA W/ 8WD4 320-5AB W/ TURCK U5310-11 CABLE
PARKER SKINNER 71315SN2MNJ1 SOLENOID VALVE 1/4" NPT 90 PSI
Siemens PLC Cable 6ES7 368-3CB01-0AA0 Aprox. 30'
PEPPERL + FUCHS INDUCTIVE RING SENSOR NIB RJ43-E2
*LOT OF 5* ALLEN-BRADLEY 800T-B RED PUSH BUTTON
ALLEN BRADLEY 1777-OA AC OUTPUT MODULE 1777OA
ALLEN BRADLEY 1334-MOD-W1 ConTROL SIGNAL CARD PCB CIRCUIT BOARD
Allen Bradley 1771-CAPR3 | PLC5 Resolver Excitation Cable
ALLEN BRADLEY CABLE ASSEMBLY 1777-CB 1777CB
ALLEN BRADLEY 1485P-P2T5-T5 DEVICEBOX 2-PORT DEVICENET COMPATIBLE
ALLEN BRADLEY I/O BLOCK MODULE 1791-24B8 SERIES B
Allen Bradley 2801-N2 Lens Mount Adapter C-Mount Vision Accessory
ALLEN BRADLEY MODULATOR BOARD 50387-002 REV 08
FURNAS 52PA2D2A EMERGENCY PUSH PULL ILLUMINATED PUSHBUTTON SER. F
SIEMENS NET COMMUNICATION PROCESSOR MODULE 6GK7343-1HX00 6GK7 343-1HX00-0E0
ALLEN BRADLEY 800MR-P16S PILOT LIGHT
ALLEN BRADLEY 800MR-P16S PILOT LIGHT
ALLEN BRADLEY 800MR-PT16R PILOT LIGHT
ALLEN BRADLEY 800MR-PT16 PILOT LIGHT
ALLEN BRADLEY 800T-P26 SER T RED PILOT LIGHT 240V 50-60 HZ
ALLEN BRADLEY 800MR-P16R PILOT LIGHT
SIEMENS CPU 313C-2DP 6ES7-313-6CF03-0AB0 DI16/D016xDC24V
ALLEN BRADLEY 800H-AP1 HEAVY DUTY GREEN PUSHBUTTON
SIEMENS CPU 313C-2DP 6ES7-313-6CF03-0AB0 DI16/D016xDC24V 307-1KA01-0AA0
ALLEN-BRADLEY PUSH BUTTONS 800H-QPB10R
WHITNEY BLAKE 14-6 SO CORD WB PART NUMBER 4-8094-00-91
ALLEN BRADLEY 800MS-X024 SQUARE ILLUMINATED PUSH BUTTON 24VAC/DC
SEICO SYNOR 61464 WIRE CABLE CORD
ALLEN BRADLEY 800MR-H33B SMALL ROUND SELECTOR SWITCH 800MRH33B
REMKE INDUSTRIES 605K0060C 300 VAC 5-POLE 6FT LEAD MICRO-link CABLE
ALLEN BRADLEY 800T-K6B16 SELECTOR PUSH BUTTON
ALLEN BRADLEY 800T-H51 SELECTOR SWITCH 800TH51
ALLEN BRADLEY 800MR-HK2B SELECTOR SWITCH 800MRHK2B
ALLEN BRADLEY 599-P01A PWR POLE ADDER NEMA SIZE 0-1 SERIES A
BRAD HARRISON 40902+ MINI CHANGE MOLDED ConNECTORS 3P FEMALE
BRAD HARRISON 40902-90 MINI-CHANGE CORDSET 3P FEMALE 90 DEGREE
BRAD HARRISON 40902-90+ MINI CHANGE MOLDED ConNECTORS 3P FEMALE 90 DEGREE
BRAD HARRISON 40902S MINI-CHANGE MOLDED CONNECTOR
Allen-Bradley PASJ2-16A Limit Switch
ALLEN BRADLEY 24VDC 3-POLE ConTACTOR 100-C09ZJ10 SER. A
ANN ARBOR TECHNOLOGIES WEBlink 17M MONITOR
Allen Bradley 800H-AK1A Series A Flush Head Green Push Button
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