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IMRIO-02
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目前，在连续型流程生产自动控制（PA）或习惯称之谓工业过程控制中，有三大控制系统，即PLC、DCS和FCS。它们各自的基本特点如下：
1 PLC
（1）从开关量控制发展到顺序控制、运送处理，是从下往上的。
（2）连续PID控制等多功能，PID在中断站中。
（3）可用一台PC机为主站，多台同型PLC为从站。
（4）也可一台PLC为主站，多台同型PLC为从站，构成PLC网络。这比用PC机作主站方便之处是：有用户编程时，不必知道通信协议，只要按说明书格式写就行。
（5）PLC网格既可作为独立DCS/TDCS，也可作为DCS/TDCS的子系统。
（6）大系统同DCS/TDCS，如TDC3000、CENTUMCS、WDPFI、MOD300。
（7）PLC网络如Siemens公司的SINEC—L1、SINEC—H1、S4、S5、S6、S7等，GE公司的GENET、三菱公司的MELSEC—NET、MELSEC—NET/MINI。
（8）主要用于工业过程中的顺序控制，新型PLC也兼有闭环控制功能。
（9）制造商：GOULD（美）、AB（美）、GE（美）、OMRON（日）、MITSUBISHI（日）、Siemens（德）等。
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ALLEN BRADLEY 492-WFB0 SINGLE CIRCUIT FUSIBLE BLOCK (SET OF 3)
ALLEN BRADLEY 494D-N2 OPERATOR DISCONNECT ASSEMBLY FOR CIRCUIT BREAKER NOS
ALLEN BRADLEY 494F-L4 DOOR HARDWARE KIT
ALLEN BRADLEY 494F-N20 MULTIPLE DOOR INTERLOCK KIT
ALLEN BRADLEY 494V-H OPERATING HANDLE MECHANISM
ALLEN BRADLEY 497-N5 CONTROL CIRCUIT TRANSFORMER .200 KVA PART # X-20922 NNB
ALLEN BRADLEY 49-N22 30A 250V 2-POLE FUSE BLOCK USED CONDITION
ALLEN BRADLEY 500-BAA940 AC CONTACTOR SIZE WITH ENCLOSURE
ALLEN BRADLEY 500-EOD930 SIZE 4 35A 600V CONTACTOR NIB
ALLEN BRADLEY 500L-BAD93 AC LIGHTING CONTACTOR WITH TYPE ENCLOSURE
ALLEN BRADLEY 500-TOD93 AC CONTACTOR 3P NIB
ALLEN BRADLEY 502L-BJAD-25R-90 COMB LIGHTING CONTACTOR DISCONNECT 30A SIZE
ALLEN BRADLEY 50-A05NB SMC-2 MOTOR CONTROLLER
ALLEN BRADLEY 50-A05NB SMC-2 MOTOR CONTROLLER
ALLEN BRADLEY 50-N84 SMART MOTOR PROTECTIVE MODULE NIB
ALLEN BRADLEY 592-E0V6 OVERLOAD RELAY 20-600VAC EXCELLENT USED CONDITION
ALLEN BRADLEY 593-B0V6 OVERLOAD RELAY 20-600VAC NOS CONDITION
ALLEN BRADLEY 595-A02 CONTACT KIT FOR O.L. RELAY
ALLEN BRADLEY 595-AA AUX CONTACT SERIES B NNB!!!
ALLEN BRADLEY 595-AA AUXILIARY CONTACT 2NO SIZE 0-5 SERIES C
ALLEN BRADLEY 595-N AUXILIARY CONTACT ADAPTER KIT
ALLEN BRADLEY 60-BA03NPSP VARIABLE SPEED DRIVE 60 SSC HP
ALLEN BRADLEY 60-BMB BRAKE UNIT /2-HP 380-460V NNB
ALLEN BRADLEY 60-BMB BRAKE UNIT /2-HP 380-460V NNB
ALLEN BRADLEY 60-BMB2 2HP DYNAMIC BRAKE MODULE
ALLEN BRADLEY 60-BMB2 2HP DYNAMIC BRAKE MODULE
ALLEN BRADLEY 60-BMB2 DYNAMIC BRAKE 460VAC 2-3HP
ALLEN BRADLEY 640-POA VISTA 2000 POWER SUPPLY
ALLEN BRADLEY 6-6374 PHOTOELECTRIC ACCESSORY ADAPTER KIT CONDITION IN PKG
ALLEN BRADLEY 69A86 FACTORY REPLACEMENT COIL 0/20V
ALLEN BRADLEY 69A86 REPLACEMENT COIL 0/20V NOS CONDITION /
ALLEN BRADLEY 69-N2 CONTACT PROTECTOR 0.5mfd
ALLEN BRADLEY 700-BRM200A AC RELAY 0A 600V NOS CONDITION
ALLEN BRADLEY 700-BRM200A AC RELAY 0A 600V NOS CONDITION
ALLEN BRADLEY 700-C200A AC CONTROL RELAY 2NO 2NC 20V
ALLEN BRADLEY 700-CF220Q CONTROL RELAY 2V COIL
ALLEN BRADLEY 700-CF220Q CONTROL RELAY 2V COIL
ALLEN BRADLEY 700-CP CONTACT CARTRIDGE FOR RELAY NIP!!
ALLEN BRADLEY 700-CR7 CONTACT CARTRIDGE BLUE
ALLEN BRADLEY 700-CR8 CONTACT CARTRIDGE RED
ALLEN BRADLEY 700-CR9 A CONTACT CARTRIDGE BLANK CONDITION /
ALLEN BRADLEY 700-CRT5 CONTACT CARTRIDGE 0A NO FOR 700R SERIES RELAY
ALLEN BRADLEY 700-CRT6 A CONTACT CARTRIDGE NC CONDITION /
ALLEN BRADLEY 700-CRT6 A CONTACT CARTRIDGE NC CONDITION /
ALLEN BRADLEY 700-CRT6 A CONTACT CARTRIDGE NC NIB!!!
ALLEN BRADLEY 700-CRT6 CONTACT CARTRIDGE ORANGE
ALLEN BRADLEY 700DC-F220NB74 CONTROL RELAY 24VDC COIL CONDITION
ALLEN BRADLEY 700DC-MB220Z24S CONTROL RELAY
ALLEN BRADLEY 700DC-P400Z24 RELAY CONTACTOR 24VDC NIB!!
ALLEN BRADLEY 700-F30A CONTACTOR 0A 600V USED WORKING CONDITION
ALLEN BRADLEY 700-HA32A- RELAY 0A DPDT 20VAC
ALLEN BRADLEY 700-HA32Z24-3-4 RELAY 0A 24VDC
ALLEN BRADLEY 700-HA33A2--4L RELAY 0A 3PDT 240VAC
ALLEN BRADLEY 700-HA33Z24 RELAY 3PDT 0A 24VDC
ALLEN BRADLEY 700-HAX3A-3-4 RELAY -PIN BASE
ALLEN BRADLEY 700-HB32A RELAY DPDT 20VAC 0A NNB!!!
ALLEN BRADLEY 700-HB32Z24 RELAY DPDT 24VDC 0A
ALLEN BRADLEY 700-HB33Z24--4 RELAY 0A 3PDT 24VDC
ALLEN BRADLEY 700-HC4Z24 RELAY 24VDC 3A 4PDT
ALLEN BRADLEY 700-HC4Z24--4 CONTROL RELAY 3A 4PDT 24V NOS CONDITION IN
ALLEN BRADLEY 700-HK36Z24 RELAY 24VDC SER A SPDT NNB!!!
ALLEN BRADLEY 700-HN22 RELAY SOCKET BASE *SET OF 4* CONDITION
ALLEN BRADLEY 700-HN26 TUBE/RELAY BASE TERMINAL SOCKETS (SET OF 3)
ALLEN BRADLEY 700-HN38 BLADE SOCKET
ALLEN BRADLEY 700-HSMD DIODE SUPPRESSOR 6-250VDC 9PCS IN PACKAGE
ALLEN BRADLEY 700-HT2AA TIME DELAY RELAY 20VAC
ALLEN BRADLEY 700-HT2AA TIME DELAY RELAY 20VAC
ALLEN BRADLEY 700-N24 RELAY SURGE SUPPRESSOR 50V
ALLEN BRADLEY 700-N5 RELAY SURGE SUPPRESSOR SERIES D NIB
ALLEN BRADLEY 700-N5 SURGE SUPPRESSOR FOR RELAY NNB
ALLEN BRADLEY 700-NA40 AUXILIARY CONTACT 4-NO
ALLEN BRADLEY 700-P200A AC RELAY 5-20V COIL USED
ALLEN BRADLEY 700-P400A AC RELAY 5-20V COIL NICE USED CONDITION
ALLEN BRADLEY 700-P800A RELAY 0A 8-N.O. CONDITION /
ALLEN BRADLEY 700-PC40 TYPE P RELAY DECK 700PC40
ALLEN BRADLEY 700-PT400A AC RELAY WITH PNEUMATIC TIME DELAY 700-PT
ALLEN BRADLEY 700-RT99N200A SOLID STATE TIMER CONDITION /
ALLEN BRADLEY 700-RTAV0A SOLID STATE TIMER
ALLEN BRADLEY 732DIB8M8 ARMORBLOCK I/O UNIT P/N 97270284
ALLEN BRADLEY 734-0B4E OUTPUT MODULE P/N 9633675 CONDITION
ALLEN BRADLEY 746-A2 2-SLOT EXPANSION RACK SLC500 NIB
ALLEN BRADLEY 747-FC FERRITE COLLAR 747FC CONDITION IN PKG
ALLEN BRADLEY 747-FC FERRITE COLLAR 747FC CONDITION IN PKG
ALLEN BRADLEY 747-L5 SLC500 PROCESSOR UNIT CONDITION /
ALLEN BRADLEY 747-L5 SLC500 PROCESSOR UNIT CONDITION /
ALLEN BRADLEY 747-PIC SLC500 INTERFACE CONVERTER W/CABLE USED CONDITION
ALLEN BRADLEY 7528 04993 R05 REGULATOR CARD NOS CONDITION
ALLEN BRADLEY 770XYB LITHIUM BATTERY
