通信介质包括传输数据的传输电缆，如同轴电缆、铜线、光纤电缆，有时可能是无线的。选择的通信协议取决于要连接到此网络的设备的数量。在DCS中，在两个或多个区域之间使用两个或更多个通信协议，例如现场控制设备和分布式控制器之间，以及在分布式控制器和监控站（例如操作站和工程站）之间使用另一个通信协议。ESD PLC将通过冗余（或双重）连接至DCS与DCS系统的串行链接或直接连接应考虑DCS网络ESD至DCS，反之亦然。
与工厂网络系统的通信操作员应能够访问整个电厂信息网络通过操作员控制台。来自DCS数据的网关应提供高速公路和以太网LAN，以允许电厂交换数据的信息系统。 该电厂网络信息系统应从DCS收集数据数据验证、历史管理、过程控制、，物料平衡。计算机网关： 网关将用于与计算机的双向通信（DEC Alpha或Intel服务器），用于实现过程控制网关将直接连接到炼油厂网络（FDDI），并将与计算机（也在网络上）。以太网端口 通信协议：TCP/IPb） DCS计算机接口能够双向通信 所有标签的数据扫描频率应为1分钟
主要产品 ：
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：备件，如模块、卡和驱动程序。例如：VMIVME-7807、 VMIVME-7750、WES532-111、UR6UH、 SR469-P5-HI-A20、IS230SRTDH2A、IS220PPDAH1B、 IS215UCVEH2A 、IC698CPE010、IS200SRTDH2ACB等，
本特利 内华达：3500/3300/1900系统，前置器等，例如： 3500/22M ,3500/32， 3500/15 , 3500/20，3500/42M，1900/27等，
Invensys Foxboro：I/A系列系统，FBM顺序控制，梯形逻辑控制，事件调用处理，DAC，输入/输出信号处理，数据通讯处理，如 FCP270 和FCP280，P0904HA，E69F-TI2-S，FBM230 /P0926GU，FEM100/P0973CA等，
Invensys Triconex : 电源模块，CPU模块，通讯模块，输入输出模块，如3008,3009,3721, 4351B ,3805E,8312,3511, 4355X等，
Woodward：SPC位置控制器，PEAK150数字控制器，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 系统、WDPF系统、MAX1000系统备件，如1C31129G03、5X00063G01、5X00063G01，1C31181G01，SE3007，VE3008等
Rockwell Allen-Bradley：Logix 1756，1794，2711触摸屏如 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系列处理器、控制卡、电源模块、
如140CPU65160, 140CPU67160 , 140CPU43412，140CPU67060，140DDI35300，140ACO13000，140CRA93100，140CPU11303，140ACO13000等，
喜马： F8650E、F8652X、F8627X、F8628X、F3236、F6217、F6214、Z7138、F8651X、F8650X 等安全模块 ，
霍尼韦尔：所有DCS卡、模块、CPU，如：CC-MCAR01、CC-PAIH01、CC-PAIH02、CC-PAIH51、CC-PAIX02、CC-PAON01、CC-PCF901、TC-CCR014、TC-PPD011，CC -PCNT02等,
摩托罗拉：MVME162、MVME167、MVME172、MVME177系列，如MVME5100、MVME5500-0163、VME172PA-652SE、VME162PA-344SE-2G等，
Xycom : I/O, VME板卡和处理器，例如XVME-530, XVME-674, XVME-957, XVME-976等，
Kollmorgen：伺服驱动器和电机，如 S72402- NANANA，S62001-550，S20330-SRS，CB06551/PRD-B040SSIB-63等，
Bosch/ Rexroth /Indramat：I/O模块，PLC控制器，驱动模块，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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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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