首先，DCS的骨架—系统网络，它是DCS的基础和核心。由于网络对于DCS整个系统的实时性、可靠性和扩充性，起着决定性的作用，因此各厂家都在这方面进行了精心的设计。对于DCS的系统网络来说，它必须满足实时性的要求，即在确定的时间限度内完成信息的传送。这里所说的“确定”的时间限度，是指在无论何种情况下，信息传送都能在这个时间限度内完成，而这个时间限度则是根据被控制过程的实时性要求确定的。因此，衡量系统网络性能的指标并不是网络的速率DCS，即通常所说的每秒比特数（bps），而是系统网络的实时性，即能在多长的时间内确保所需信息的传输完成。系统网络还必须非常可靠，无论在任何情况下，网络通信都不能中断，因此多数厂家的DCS均采用双总线、环形或双重星形的网络拓扑结构。为了满足系统扩充性的要求，系统网络上可接入的**节点数量应比实际使用的节点数量大若干倍。这样，一方面可以随时增加新的节点，另一方面也可以使系统网络运行于较轻的通信负荷状态，以确保系统的实时性和可靠性。在系统实际运行过程中，各个节点的上网和下网是随时可能发生的，特别是操作员站，这样，网络重构会经常进行，而这种操作**不能影响系统的正常运行，因此，系统网络应该具有很强在线网络重构功能。

     

     　　其次，这是一种完全对现场I/O处理并实现直接数字控制（DDC）功能的网络节点。一般一套DCS中要设置现场I/O控制站，用以分担整个系统的I/O和控制功能。这样既可以避免由于一个站点失效造成整个系统的失效，提高系统可靠性，也可以使各站点分担数据采集和控制功能，有利于提高整个系统的性能。DCS的操作员站是处理一切与运行操作有关的人机界面（HMI-Human Machine Interface或operator interface）功能的网络节点。

 

NEW Allen Bradley PowerFlex 700 20BD180A0ANNAND0 150HP

Allen Bradley PowerFlex 700 20BD180A0AYNANN0 150HP

MINT Allen Bradley PowerFlex 700 20BD156A3ANNAND0 125HP

Allen Bradley 1394-SJT22-T-RL A 1394SJT22TRL Excellent

Allen Bradley PowerFlex 700 20BD096A3ANNANB0 /A 75HP

NEW Allen Bradley Panelview 2711-T10C20 /F 2711T10C20

NEW Sealed Allen Bradley 2711P-B10C4D6 2711PB10C4D6

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NEW GE Fanuc A20B-1006-0114/03A A20B1006011403A

Allen Bradley Powerflex 700 20BE052A0AYNAND0 /A 50 HP

MINT Allen Bradley 2711P-T15C4D1 /A 2711-T15C4D1

NEW Allen Bradley 2711PC-T10C4D1 2711PCT10C4D1 MFG:2010

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Allen Bradley 2711P-T15C4D1 /A 2711PT15C4D1 Panelview

FANUC A06B-6055-H108 Spindle Unit Amp A06B6055H108

Siemens Panel 6AV6 545-0DA10-0AX0 6AV65450DA100AX0

MINT ALLEN BRADLEY Versaview 6180W-15BSXPH 1500 IND PC

NEW Allen Bradley 2711-T10C1 /F 2711T10C1 Panelview1000

NEW GE Fanuc Teach Pendant A05B-2518-C370 A05B2518C370

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Allen Bradley 2711P-K12C4D2 D 2711PK12C4D2 Excellent

Allen Bradley PowerFlex 700S 20DD011A0EYNANNNA A 7.5HP

Modicon Square D XBT F024110 XBTF024110

MINT Mitsubishi MR-J2S-350A MRJ2S350A AC Servo Drive

Allen Bradley 2711-T10C10 /D 2711T10C10

GE FANUC A06B-6093-H111 Servo Amplifier A06B6093H111

NEW Allen Bradley 2098-DSD-HV050-SE /A 2098DSDHV050SE

Emerson Servo Motor BLM-6210B-4 BLM6210B4 10HP 210inlbs

MINT Indramat DKC01.1-040-7-FW DKC01.10407FW AC Servo

MINT Allen Bradley 2711P-T6M20A /A 2711PT6M20A

NEW Allen Bradley 2711-B5A5 /B 2711B5A5 Panelview 550

New Allen Bradley 2094-BMP5 A 2094BMP5 Kinetix 6000

MINT SAFTRonICS GP5 GP547P7 VFD

Allen Bradley Servo Control 1391-DES22-DI

Allen Bradley Powerflex 700 20BD022A0AYNANC0 /A 15HP

New Panasonic Nachi Fujikoshi Servo Motor MFA220FYSBDB

NEW GE Fanuc A06B-6089-H105 A06B6089H105 Servo Amp

NEW Siemens Simatic 6AV6 641-0CA01-0AX1 6AV66410CA01

GE FANUC A06B-6079-H106 A06B6079H106 Servo Amplifier

Emerson Commander SK Control Techniques SK2403

NEW Allen Bradley 2711-T6C15L1 /B 2711T6C15L1

Allen Bradley 2711-B6C3 /A 2711B6C3 Panelview 600

MINT Siemens 6AV6 545-0AA15-2AX0 6AV65450AA152AX0

New In Box Model CE20 Nordson Glue Gun

Pacific Scientific SC903-050-01 Servo Drive SC90305001

NEW Nachi Fujikoshi AC Servo Motor MFA220FYSBDB

New Yaskawa CACR-SR15BZ1SSY367 CACRSR15BZ1SSY367

NEW SEALED Allen Bradley 1791-IOBW /A 1791IOBW

Baumuller BUM60-12/24-54-B-000 BUM6012/2454B000 Servo

GE Fanuc A06B-6093-H102 A06B6093H102 Servo Amplifier

NEW KAWASAKI P60B13200LCX23 Sanyo Servo Motor 4HP

NEW SEALED Allen Bradley 2711P-B4C20D /C 2711PB4C20D

Siemens 6SC 6112-0AA00 6SC6112-0AA00 6SC61120AA00 Servo

NEW Animatics SM2316DT-PLS2 SM2316DTPLS2 Servo Motor

MINT GE Fanuc A05B-2302-C080 A05B2302C080 DCR/DBR UNIT

FANUC A06B-6090-H234 Servo Amplifier A06B6090H234

NEW Allen Bradley 1791-IOBW /A 1791IOBW I/O Module

Allen Bradley 1336E-CWF30-AA-EN-L9E VFD 1336ECWF30AAL9E

Emerson PCM-22 PCM22 Servo Drive Rotary Knife Control

Siemens Panel 6AV6 545-0AA15-2AX0 6AV65450AA152AX0

New In Box Mitsubishi Melsec FX2-80MS PLC FX280MS

Modicon PC-F984-685 PCF984685 Programmable Controller

NEW Allen Bradley 22B-B017N104 /A 22BB017N104 5 HP

MINT Allen Bradley Panelview 2711-T6C1L1 /B 2711T6C1L1

NEW Emerson Control Techniques AFFINITY BA3403 40HP

Allen Bradley PowerFlex 700 20BD014A0AYNANB0 /A 10HP

Siemens COROS OP15 Operator Panel 6AV3515-1MA30 Low Use

GE Fuji Electric Drive 30HP 6KG11230301B1 AF-300 G11

GE Fanuc A06B-6079-H104 A06B6079H104 Servo Amplifier

SMART MOTOR Antimatics SM3420D Servo Motor

NEW Siemens Motor 1 FT5064-0AF01-2 FT50640AF012

NEW Siemens HVAC 6SE6436-2UE31-1CA0 6SE64362UE311CA0

Allen Bradley Powerflex 70 20AD022C3AYNANNN /A 16 HP

New GE FANUC A06B-6058-H225 Servo Amp A06B6058H225

Pacific Scientific SC903-050-01 SC90305001

Siemens Sinodrive 6SN1118-0DM21-0AA0 6SN11180DM210AA0

NEW Allen Bradley ProSoft MVI46-GSC MVI46GSC Comm Mod

New In Box Mitsubishi Melsec FX2-24MR-A1 PLC FX224MRA1

NEW Allen Bradley PowerFlex 70 20AD011F0AYNANC0 7.5 HP

Allen Bradley Powerflex 70 20AD8P0A3AYNANNN /A 5 HP

MITSUBISHI FR-E540-7.5K-NA FRE5407.5KNA 10HP

Allen Bradley 2094-BM01 A 2094BM01 Servo Kinetix 6000

Allen Bradley Powerflex 700 20BD014A0AYNANC0 /A 10HP

NEW AC Tech Lenze SF250 Sub Micro Drive

NEW Siemens 1FK7042-5AK71-1FA0 1FK70425AK711FA0 Motor

NEW Siemens 1FK7042-5AK71-1FB0 1FK70425AK711FB0 Motor

NEW Siemens 1FK7060-5AF71-1PA0 1FK70605AF711PA0 Motor

NEW Siemens 6AV5030-1DL20-0AC0 6AV50301DL200AC0 Panel

MINT GE FANUC IC800SSI104D2A AC Servo Motor Controller

GE FANUC A16B-2201-0891 A16B22010891 Ethernet Module

NEW Animatics SmartMotor SM2337D Motor

NEW Allen Bradley Powerflex 70 20AB015A0AYNANNN /A 5HP

Allen Bradley 2711P-RDT10C /A 2711PRDT10C Panelview

New In Box FANUC AC Servo Motor A06B-0522-B031

Keyence CV-030 CCD Color Vision Camera CV030 Excellent

Pacific Scientific SCE902-001-01 SCE90200101

FANUC A06B-6088-H001 A06B6088H001

Modicon Telemecanique TCCX1730LW

NEW Lenze AC Tech Inverter ESV751N06TXB Drive 1 HP

New Allen Bradley 2094-BMP5 A 2094BMP5 Kinetix 6000

Allen Bradley Panelview 2711-K10C1 B 2711K10C1

Allen Bradley Powerflex 700 20BC015A0AYNACC0 /B 10HP

Allen Bradley Panelview 2711-T10C15 C Excell 2711T10C15

Rexroth Indramat HDD02.2-W040N-HD12-01-FW HDD02.2W040N

MINT ABB Drive ACS501-005-2-00P2 ACS501005200P2 5HP

Allen Bradley 6189-RPRH /A 6189RPRH VersaView Panelview

Siemens Panel 6AV6 545-0BB15-2AX0 6AV65450BB152AX0

MINT Yaskawa EMS G5U-27P5 G5U27P5 CIMR-G5U27P5 15HP

NEW Allen Bradley N-4220-2-H00AA /B N42202H00AA Motor

Sanyo Denki BL Super 67ZA150A873S00 Servo Amplifier

MINT Allen Bradley 2711P-K4M20A /B 2711PK4M20A

MOOG Brushless Motor 304-131A 304131A

Yaskawa SERVOPACK SGDB-15ADG SGDB15ADG Servo Drive

New In Box Allen Bradley 1336VT-B003-EAN-FA2-L3-S1 A

Allen Bradley 2094-BMP5-S /A 2094BMP5 4A Axis Module

Siemens Simatic 6ES5951-7LD12 6ES59517LD12

GE Fanuc Teach Pendant A05B-2301-C360 A05B2301C360

NEW Yaskawa AC Drive SGDH-15AE SGDH15AE

Siemens Simodrive 1P 6SN1162-1AA00-0AA0 Two Axis Drive

Allen Bradley 20AD5P0A0AYNNNNN /A 20AD5P0A0AYNNNNN 3HP

Allen Bradley Panelview 2711-T10C15 D 2711T10C15

GE Fanuc A06B-6066-H005 A06B6066H005

GE FANUC A16B-1212-0901 A16B12120901 Power Supply

GE Fanuc A05B-2051-C143 A05B2051C143 Teach Pendant

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Siemens Simodrive 6SN1130-1AA11-0GA0 6SN11301AA110GA0

ABB ACH501-025-4-00P2 ACH501025400P2 25 HP Drive

Allen Bradley 1794-IR8 /A 1794IR8 Input Module

ABB Drive 3HAB8101-8/08D 3HAB8101808D

NEW MITSUBISHI MR-J2S-60B MRJ2S60B AC Servo

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Nexen SBP4-24.0-050-110-10-150-2 964829 Servo Brake

New Sealed Allen Bradley 2098-DSD-010-SE C 2098DSD010SE

New Mitsubishi Melsec FX2N-32ER-ES/UL PLC FX2N32ERES/UL

Rice Lake Weighing Systems IQPlus 800 IQ+800-3A IQ8003A

Allen Bradley Processor 1794-L33 /A 1794L33

GE Fanuc A06B-6089-H105 A06B6089H105 Servo Amplifier

NEW Rosemount 03031-3023-0042 0303130230042

NEW Animatics Smart Motor SM3410D

Yaskawa Electric LEGEND 10 SGDG-10GT SGDG10GT 1.3HP

MINT Yaskawa Electric CIMR-V7AM22P2 CIMRV7AM22P2

NEW Mitsubishi MR-J200A-UL MRJ200AUL Servo Amplifier

Allen Bradley Panelview 600 2711-B6C1 /B 2711B6C1

Allen Bradley Panelview 2711-T9C9 B 2711T9C9

Siemens CPU 6ES5 943-7UB11 6ES5943-7UB11 6ES59437UB11

Siemens Simodrive 6SN1123-1AA00-0CA0 6SN11231AA000CA0

New Allen Bradley 1762-IT4 /A 1762IT4

Indramat TVM 2.2-050-220/300-W1 TVM2.2050220/300W1

NEW Emerson Control Techniques Commander SKC3400400

NEW Yaskawa Servopack SGD-02AS SGD02AS

NEW Allen Bradley 1398-DDM-005 /A 1398DDM005 Servo

NEW Emerson EB-208-05-000 EB20805000 Digital ServoDrive

ProSoft Allen Bradley MVI46-MBP MVI46MBP Module

MINT Allen Bradley Powerflex 20AD8P0A1AYNANNN /A 5 HP

NEW SEALED MITSUBISHI FR-Z340-3.7K-AW FRZ34037KAW

NEW Allen Bradley 1326AB-B420E-M2L /B 1326ABB420EM2L

NEW KOLLMORGEN BDS4A-106J-0001/204B2 BDS4A106J0001

New Allen Bradley Panelview 2711-B5A1L1 H 2711B5A1L1

Rosemount Transmitter 3051 CG5A22A1AC1E804A0112

Sanyo Denki BL Super 67ZA100AJC3S01 Servo

NEW Emerson EMX3-0053B-711 EMX30053B711

Yaskawa Electric CIMR-V7NU43P7 CIMRV7NU43P7

Emerson FX-340 w/ PCM-11 FX340 PCM11 Servo Drive

NEW Allen Bradley 1794-IF4I /A 1794IF4I I/O Module

NEW Indramat Bosch Rexroth HZK02.1-W003N HZK021W003N

Modicon AS-B873-001 ASB873001 Input Module

NEW Kollmorgen B-204-C-21 B204C21 Brushless ServoMotor

Allen Bradley 1784-PCMK /A w/ 1784-PCM5 1784PCMK

Micro Motion CMF025M313NU Mass Flow Sensor

GE FANUC IC752CCS009B Control Station CE

NEW Nachi Fujikoshi MFMA552D4V5 AC Servo Motor 5.5kW

Pacific Scientific PC832-102-N-4122 PC832102N4122

NEW MITSUBISHI FR-A220E-1.5K-UL FRA220E1.5KUL

Pacific Scientific SC402-016-T4 SC402016T4

Pacific Scientific PC832-001-T PC832001T Servo Drive

NEW Adept Tech Pendant P/N 101

Allen Bradley 2098-DSD-010-SE B 2098DSD010SE Excellent

SmartMotor Animatics SM2315D

NEW Emerson Control Techniques AFFINITY BA1406 7.5 HP

FANUC A06B-6066-H011 Servo Amplifier A06B6066H011 Excel

Allen Bradley 1784-PCC /B w/ 1784-PCC Cable 1784PCC

Yaskawa Servopack 200V CACR-PRA5AC3ER CACRPRA5AC3ER

NEW MITSUBISHI FR-E520-2.2K-NA FRE52022KNA 3HP

Emerson Motor DXM-318B DXM318B

Animatics Smart Motor SM2330D

Allen Bradley Panelview 550 2711-T5A2L1 /B 2711T5A2L1

NEW Animatics Smart Motor SM1720M 4.15C

NEW Kollmorgen BDS4-203H-9105-204A7 BDS4203H9105204A7

Bosch Rexroth EC Motor Type 0 608 701 017 0608701017

Baldor Electric Vector Drive ZD38D8A04-ERD ZD38D8A04ERD

New GE FANUC A06B-0310-B351 CNC AC Servo Motor

New GE FANUC A06B-0522-B251 CNC AC Servo Motor

New GE FANUC Serial Board A16B-2200-0210 A16B22000210

Yaskawa SERVOPACK DR2-01AC DR201AC

Allen Bradley Powerflex 4 22A-D8P7N104 22AD8P7N104 5 HP

MINT Animatics SmartMotor SM2320D

NEW Allen Bradley 22B-E1P7N104 /A 22BE1P7N104 1HP

NEW Pacific Scientific R33GMNP-R2-NS-NV-01 R33GMNP

SmartMotor Animatics SM2315D-S2 SM2315DS2

MINT Siemens 6AV3503-1DB10 6AV35031DB10

Cutler-Hammer IQ DP-4000 IQDP4000 Power Supply Module