输出连接
(1)输出端接线分为独立输出和公共输出。在不同组中,可采用不同类型和电压等级的输出电压。但在同一组中的输出只能用同一类型、同一电压等级的电源。
(2)由于PLC的输出元件被封装在印制电路板上,并且连接至端子板,若将连接输出元件的负载短路,将烧毁印制电路板,因此,应用熔丝保护输出元件。
(3)采用继电器输出时,所承受的电感性负载的大小,会影响到继电器的使用寿命,因此,使用电感性负载时选择继电器工作寿命要长。
(4)PLC的输出负载可能产生干扰,因此要采取措施加以控制,如直流输出的续流管保护,交流输出的阻容吸收电路,晶体管及双向晶闸管输出的旁路电阻保护。
为了确保整个系统能在安全状态下可靠工作,避免由于外部电源发生故障、PLC出现异常、误操作以及误输出造成的重大经济损失和人身伤亡事故,PLC外部应安装必要的保护电路。
(1)急停电路。对于能使用户造成伤害的危险负载,除了在控制程序中加以考虑之外,还应设计外部紧急停车电路,使得PLC发生故障时,能将引起伤害的负载电源可靠切断。
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MODICON AS-M480-008 8K MEMORY CARTRIDGE -
Modicon MA-4947-200 P180 Keyboard Rev D
MORSE CADET 25 MOTOR SPEED CONTROL 157615 1/4HP
MORSE CADET 25 MOTOR SPEED CONTROL 157615 1/4HP
Motoman Dongles / Hardware Keys / RB-K01940
Motorola M2000-355 CRT Monitor 5031.E NOS in origional box
Motortronics LC2-1-P 240/480V Drive
MSA MiniOX Responder Oxygen Detector P/N 710965
MTS / CSM model MPD-10-460-03 servo drive surplus
MTS CSM Incol 473 part number 113791-69 or Gordos PB-24HQ
MULTILINK 10Gb/s Optical Transceiver MTC21208A /
Murphy Swichgage RPM Guage -
Murphy Swichgage RPM Guage -
MWM Diesle Original Part K TO 1810 Ws: 37.5225.511
MWM Diesle Original Part K TO 1810 Ws: 37.5225.511
MWM Diesle Original Part K TO 1810 Ws: 37.5225.511
MWM Diesle Original Part K TO 1910
MWM Diesle Original Part K TO 1910
MWM Diesle Original Part K TO 1910
Namco Limit Switch EA130-14200 un surplus -NIB
NB31200F WESTINGHOUSE CIRCUIT BREAKER 900 Amp 3 Pole 600 Volt
NCC TIMER 1.2-120 SECONDS 24 VDC
NCC TIMER 1.2-120 SECONDS 24 VDC
NOS VINTAGE CAPACITOR 2-363A004H118 7019 NO MARKINGS UNTESTED -FREE SHIP-
Oil Proof Limit Switch Micro Switch LSZ7A2B / 7550 item
Oil Proof Limit Switch Micro Switch LSZ7A2B / 7550 item
OMEGA 6102RTD-0-600C IN BOX
OMEGA 6102RTD-0-600C IN BOX
Omega FMA-904-I-S -
Omega FMA-904-I-S -
Omega FMA-904-I-S -
Omron C200H-RM201/C200HRM201 Remote I/O Very Box Free Ship
Omron C200H-RM201/C200HRM201 Remote I/O Very Box Free Ship
Omron C200H-RM201/C200HRM201 Remote I/O Very Box Free Ship
OMRON C500-ASC04 in Box Free Ship
OMRON C500-ASC04 in Box Free Ship
OMRON C500-ASC04 in Box Free Ship
OMRON C500-BC091 In Box Free Ship
OMRON C500-BC091 In Box Free Ship
OMRON C500-BC091 In Box Free Ship
OMRON CPU Unit C200HX-CPU64-E in Box Free Ship
OMRON CPU Unit C200HX-CPU64-E in Box Free Ship
OMRON CPU Unit C200HX-CPU64-E in Box Free Ship
Omron CV500-IC201 I/O Control Unit CV500IC201 in Box Free Ship
Omron CV500-IC201 I/O Control Unit CV500IC201 in Box Free Ship
Omron CV500-IC201 I/O Control Unit CV500IC201 in Box Free Ship
Omron E39-X4 Light Source
OMRON H5-CN-BN TIMER SOURCE:12 TO 48VDC UN FROM . OB1
OMRON H5-CN-BN TIMER SOURCE:12 TO 48VDC UN FROM . OB1
OMRON Sysmac C60 K Programmable Controller PLC
OMRON Sysmac C60 K Programmable Controller PLC
OMRON Sysmac C60 K Programmable Controller PLC
Omron Z4D-F04D Micro Displacement Sensor UN
Opto 22 B4 32-channel Digital Brain Pamux Board -
Opto 22 B4 32-channel Digital Brain Pamux Board -
Opto 22 G4 IAC5 Solid State Input Module G4IAC5 UN
ORMEC AC SERVO MOTOR MAC-B200F/K1A FREE SHIPPING
ORMEC AC SERVO MOTOR MAC-B200F/K1A FREE SHIPPING
ORMEC AC SERVO MOTOR MAC-B200F/K1A FREE SHIPPING
Ormec F Series Part # PAC-F50R 230vac 50amp power supply -
Ormec F Series Part # PAC-F50R 230vac 50amp power supply -
Ormec F Series Part # PAC-F50R 230vac 50amp power supply -
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