6FX1121-4BA01正品
6FX1121-4BA01正品



　(1)来自空间的辐射干扰

　　空间的辐射电磁场（EMI）主要是由电力网络、电气设备的暂态过程、雷电、无线电广播、电视、雷达、高频感应加热设备等产生的，通常称为辐射干扰，其分布极为复杂。若PLC系统置于所射频场内，就回收到辐射干扰，其影响主要通过两条路径；一是直接对PLC内部的辐射，由电路感应产生干扰；而是对PLC通信内网络的辐射，由通信线路的感应引入干扰。辐射干扰与现场设备布置及设备所产生的电磁场大小，特别是频率有关，一般通过设置电缆和PLC局部及高压泄放元件进行保护。

　　(2)来自系统外引线的干扰

　　主要通过电源和信号线引入，通常称为传导干扰。这种干扰在我国工业现场较严重。

　　(3)来自电源的干扰

　　实践证明，因电源引入的干扰造成PLC控制系统故障的情况很多，笔者在某工程调试中遇到过，后更换隔离性能更高的PLC电源，问题才得到解决。

　　PLC系统的正常供电电源均由电网供电。由于电网覆盖范围广，将受到所有空间电磁干扰而在线路上感应电压和电路。尤其是电网内部的变化，入开关操作浪涌、大型电力设备起停、交直流转动装置引起的谐波、电网短路暂态冲击等，都通过输电线路到电源边。PLC电源通常采用隔离电源，但其机构及制造工艺因素使其隔离性并不理想。实际上，由于分布参数特别是分布电容的存在，隔离是不可能的。

Texas Instruments Sequencer Type# 571 SEQUENCER!
ALLEN BRADLEY 1336S-BRF15-AE?-EN5 NSFP 1336SBRF1***EEN?5
SIEMENS 6ES5-391-***A13 USPP 6ES5391***A13
ASEA BROWN BOVERI NDCU-21C USPP NDCU21C
Texas Instruments 5TI-1029-1
TEXAS INSTRUMENTS PLC 505-6308 NSPP 5056308
TEXAS INSTRUMENTS PLC 949025-000 USPP 949025000
Texas Instruments model PM550-212 P/N 2461375-0001
ASEA BROWN BOVERI DSRF-171 USPP DSRF171
Panasonic AC Servo Driver MADHT1507E NIB Free Ship
Panasonic MSDA041D1A AC Servo Driver 82V 400W
ASEA BROWN BOVERI DSDP-150 USPP DSDP150
(AB01) AC SERVO DRIVER PANASONIC MATSUSHITA ELECTRIC MSD041A1XX14 WORKING
ALLEN BRADLEY 1756-L55M12 USPP 1756L55M12
Panasonic AC Servo MQDB012AAD 100W & Motor MQMA012A3F
(AG01) PANASONIC MSM011A1EE CP-16A-11-J213?A-SP MSM011AT7 SERVO MOTOR WORKING
Panasonic MSDA041D1A AC Servo Driver 82V 400W
TEXAS INSTRUMENTS PLC 7MT-700 USPP 7MT700
TOSHIBA 2N3B2547-A5 USPP 2N3B2547A5
ASEA BROWN BOVERI ACH501-015-4-0?0P2 USPP ACH501015400P2
TEXAS INSTRUMENTS 500-5019 WORD OUTPUT MODULE NEW 5005019
MOTOROLA 01-W3875B-04F USPP 01W3875B04F
TEXAS INSTRUMENTS PLC 500-5041 NSFP 5005041
TEXAS INSTRUMENTS PLC 500-7111 USPP 5007111
TEXAS INSTRUMENTS 500-5035 5005035
PANASONIC MSDA403D1A AC SERVO DRIVE 4KW Free Ship
ASEA BROWN BOVERI EH800-C1 USPP EH800C1
ASEA BROWN BOVERI 3HAA3563-AHA/2 USPP 3HAA3563AHA2
GENERAL ELECTRIC 193X377AAG01 USPP 193X377AAG01
ASEA BROWN BOVERI DSQC-236T USPP DSQC236T
TEXAS INSTRUMENTS PLC 5TI-1013-1 USPP 5TI10131
ALLEN BRADLEY 1771-HSAR USPP 1771HSAR
SECO SE2135 USPP SE2135
Returns: Not accepted
ALLEN BRADLEY 1336S-BRF75-AN?-EN5 USPP 1336SBRF7***NEN?5
TEXAS INSTRUMENTS PLC 560-2122 USPP 5602122
PERCEPTRON CAMERA TRICAM CONTOUR SENSOR 911-0007
ALLEN BRADLEY 160-AA18PS1-AF?-DS-PIC NSPP 160AA18PS1AFDS?PI
ALLEN BRADLEY 813S-VOA USPP 813SVOA
ASEA BROWN BOVERI DSQC116 USPP DSQC116
Texas Instruments 5TI-1034-1
Texas Instruments 500-5114A Base Controller 500-5114-A
TEXAS INSTRUMENTS PLC 505-7028 USPP 5057028
Texas Instruments / Siemens: 505-4732 24VDC Output Mod
ASEA BROWN BOVERI 5716075K USPP 5716075K
Panasonic AC Servo Motor MHMD082G1U 750W New in Box Free Ship
MERLIN GERIN 168-0342 NSFP 1680342
MITSUBISHI MC210-CE NSFP MC210CE
KOLLMORGEN IND BDS4A-203J-000?1-104A21P USPP BDS4A203J00011?01
Texas Instruments RTU-M056-A MICRO CONTROLLER RTUM056A
EXLAR GSX40-0602-MXX?-FA2-23-XT USPP GSX400602MXXFA?22
ASEA BROWN BOVERI 57360001-AN USPP 57360001AN
Texas Instruments 500-2109
Expedited shipping ailable
SIEMENS/TI/CTI 2550 505-2550 505 PLC
TEXAS INSTRUMENTS PLC 7MT-100A NSPP 7MT100A
ASEA BROWN BOVERI OETL-NF1600SW USPP OETLNF1600SW
ASEA BROWN BOVERI YT212001-BR-YB?KA70-15 USPP YT212001BRYBKA?70
ASEA BROWN BOVERI 289B456A13 NSPP 289B456A13
ASEA BROWN BOVERI 68463815-P FNFP 68463815P
Texas Instruments 500 System PLC Series Rack 13 Modules
SQUARE D MAL36450-8041 NSFP MAL364508041
Texas Instruments RTU-DIN-1 Digital Input Board Part# 520-063 520063
FOXBORO 2ARPS-A6 USPP 2ARPSA6
TEXAS INSTRUMENTS 530C-1108 530C1108 SIEMANS MODULE
(AB01) AC SERVO DRIVE UNIT PANASONIC ADKA100BPTADA WORKING
WEINIG 1LA5131-2FB90-?ZX51 USPP 1LA51312FB90ZX?51
TEXAS INSTRUMENTS PLC 5TI-5011 NSPP 5TI5011
TEXAS INSTRUMENTS PLC 100-3103 USPP 1003103
TEXAS INSTRUMENTS PLC 500-5006 USPP 5005006
ASEA BROWN BOVERI EH260C-1 USPP EH260C1
Texas Siemens Instrument 500-2151A Power Supply