通信介質包括傳輸數據的傳輸電纜，如同軸電纜、銅線、光纖電纜，有時可能是無線的。選擇的通信協議取決于要連接到此網絡的設備的數量。在DCS中，在兩個或多個區域之間使用兩個或更多個通信協議，例如現場控制設備和分布式控制器之間，以及在分布式控制器和監控站（例如操作站和工程站）之間使用另一個通信協議。ESD PLC將通過冗余（或雙重）連接至DCS與DCS系統的串行鏈接或直接連接應考慮DCS網絡ESD至DCS，反之亦然。
與工廠網絡系統的通信操作員應能夠訪問整個電廠信息網絡通過操作員控制臺。來自DCS數據的網關應提供高速公路和以太網LAN，以允許電廠交換數據的信息系統。 該電廠網絡信息系統應從DCS收集數據數據驗證、歷史管理、過程控制、，物料平衡。計算機網關： 網關將用于與計算機的雙向通信（DEC Alpha或Intel服務器），用于實現過程控制網關將直接連接到煉油廠網絡（FDDI），并將與計算機（也在網絡上）。以太網端口 通信協議：TCP/IPb） DCS計算機接口能夠雙向通信 所有標簽的數據掃描頻率應為1分鐘
主要產品 ：
ABB : Industrial robot spare parts DSQC series, Bailey INFI 90, IGCT, etc., for example: 5SHY6545L0001 AC10272001R0101 5SXE10-0181, 5SHY3545L0009，5SHY3545L0010 3BHB013088R0001 3BHE009681R0101 GVC750BE101, PM866, PM861K01, PM864, PM510V16, PPD512 , PPD113, PP836A, PP865A , PP877, PP881, PP885，5SHX0660F0001，PM851AK01-EA， 3BHL000390P0104 PM851AK01等，
GE：備件，如模塊、卡和驅動程序。例如：VMIVME-7807、 VMIVME-7750、WES532-111、UR6UH、 SR469-P5-HI-A20、IS230SRTDH2A、IS??220PPDAH1B、 IS215UCVEH2A 、IC698CPE010、IS200SRTDH2ACB等，
本特利 內華達：3500/3300/1900系統，前置器等，例如： 3500/22M ,3500/32， 3500/15 , 3500/20，3500/42M，1900/27等，
Invensys Foxboro：I/A系列系統，FBM順序控制，梯形邏輯控制，事件調用處理，DAC，輸入/輸出信號處理，數據通訊處理，如 FCP270 和FCP280，P0904HA，E69F-TI2-S，FBM230 /P0926GU，FEM100/P0973CA等，
Invensys Triconex : 電源模塊，CPU模塊，通訊模塊，輸入輸出模塊，如3008,3009,3721, 4351B ,3805E,8312,3511, 4355X等，
Woodward：SPC位置控制器，PEAK150數字控制器，如8521-0312 UG-10D，9907-149, 9907-162, 9907-164 , 9907-167, TG-13 (8516-038), 8440-1713/D， 5466-258、8200-226等，
西屋/艾默生： OVATION 系統、WDPF系統、MAX1000系統備件，如1C31129G03、5X00063G01、5X00063G01，1C31181G01，SE3007，VE3008等
Rockwell Allen-Bradley：Logix 1756，1794，2711觸摸屏如 2711-B6C20等，
Rockwell ICS TRIPLEX：T8151B,T8311 ,T8403 ,T9431, T8480C等,
Rockwell Reliance：PLC-MODULE，WR-D4007，0-57406-E，Y-3023-2-H00AA等，
施耐德 Modicon：Quantum 140系列處理器、控制卡、電源模塊、
如140CPU65160, 140CPU67160 , 140CPU43412，140CPU67060，140DDI35300，140ACO13000，140CRA93100，140CPU11303，140ACO13000等，
喜馬： F8650E、F8652X、F8627X、F8628X、F3236、F6217、F6214、Z7138、F8651X、F8650X 等安全模塊 ，
霍尼韋爾：所有DCS卡、模塊、CPU，如：CC-MCAR01、CC-PAIH01、CC-PAIH02、CC-PAIH51、CC-PAIX02、CC-PAON01、CC-PCF901、TC-CCR014、TC-PPD011，CC -PCNT02等,
摩托羅拉：MVME162、MVME167、MVME172、MVME177系列，如MVME5100、MVME5500-0163、VME172PA-652SE、VME162PA-344SE-2G等，
Xycom : I/O, VME板卡和處理器，例如XVME-530, XVME-674, XVME-957, XVME-976等，
Kollmorgen：伺服驅動器和電機，如 S72402- NANANA，S62001-550，S20330-SRS，CB06551/PRD-B040SSIB-63等，
Bosch/ Rexroth /Indramat：I/O模塊，PLC控制器，驅動模塊，MSK060C-0600-NN-S1-UP1-NNNN，VT2000-52/R900033828，MHD041B-144-PG1-UN等
The proposed 4 nos PLC systems shall be replacing existing M/s.Yaskawa make PLC (4 nos) manufactured and engineered by L&T Mumbai and supplied by M/s.ABB-ABL Calcutta. The job includes removal, replacement of the existing, PLC and its associated panels & hard wares & design, fabrication, supply, erection, installation and commissioning of new ESD PLC along with associated panels and hardware for the Boiler House plant. The scope of work shall comprise of the following but not limited to: a. System Design and Engineering b. Manufacture / supply of all hardware and software necessary to meet specified functional requirements including system configuration, system integration, factory testing and acceptance of the system. c. PLC shall have latest version of Software, Firmware and hardware. d. The PLC shall be TUV AK5 /SIL3 as per IEC61508 certified. e. PLC shall have dual redundant processor as a minimum. Additional redundancy for I/Os/Power supply/Communication network shall be provided as a minimum requirement f. PLC system cabinets shall have hardened plastic doors to look through the various components system status without opening the door. g. Preferably PLC shall connected to DCS system network, otherwise serial interfaces between PLC and DCS shall be redundant and through dedicated controller in DCS. h. The software shall include operating system and application program. The application program shall include software for performing functions like interlock and shutdown logics, programming, programming modifications and documentation etc. The programming format shall be only FLD type using functional blocks. User defined functional blocks shall be possible to develop.
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GE WES5120 5120-1506
GE WES5120 5120-1106
GE WES5302-150
GE WES5302-111
GE WESCOM D200 VME
GE D20 EME的框架
GE WES5162-9101
GE WES5123-2600
GE WES5123-1200
GE DL-1200/RTU
GE PRG-MODEM
GE WES5162黑色框架
LAETUS LLS570-05
EATON XV-440-10TVB-1-13-1
DANAHER S21260-SRS
NI SCXI-1000
NI SCXI-1520
NI SCXI-1125
NI SCXI-1127
RELIANCE ELECTRIC S-D4012
RELIANCE ELECTRIC S-D4008
RELIANCE ELECTRIC S-D4007
RELIANCE ELECTRIC S-D4006
RELIANCE ELECTRIC WR-D4007
RELIANCE ELECTRIC WR-D4008
RELIANCE ELECTRIC S-D4043
RELIANCE ELECTRIC S-D4041
ABB PP846A 3BSE042238R2
ABB PP846 3BSE042238R1
ABB LDGRB-01 3BSE013177R1
GE VMIVME-7750 VMIVME-7750-746001 350-027750-746001 P
ABB PPC905AE101 3BHE014070R0101
GE IS220PVIBH1A 336A4940CSP16
ABB 5SHY3545L0010 3BHB013088R0001 3BHE009681R0101 GVC750BE101
GE IS420UCSCH2A-C-V0.1-A
KONGSBERG RCU502
ABB PFEA111-20 3BSE028140R0020
ABB PFEA111-65/3BSE050090R65
BENTLY 149992-01
HIMA F3430
PTM PSMU-350-3
GE 8102-HO-IP
ABB PM876
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