Description
DCS安全性：为保证DCS控制的设备的安全可靠，DCS采用了双冗余的控制单元，当重要控制单元出现故障时，都会有相关的冗余单元实时无扰的切换为工作单元，保证整个系统的安全可靠。PLC所搭接的系统基本没有冗余的概念，就更谈不上冗余控制策略。特别是当其某个PLC单元发生故障时，不得不将整个系统停下来，才能进行更换维护并需重新编程。所以DCS系统要比其安全可靠性上高一个等级。
Nortel Passport 8608GBE DS1404038 8610 GBIC Module
90 Day Hardware Warranty – Free Overnight Shipping!
Nortel 8672 PASSPORT 2SLOT MDA ATM MOD DS1303001 8610
45 Day Hardware Warranty – Free Shipping!
Unisphere Juniper T3 Frame T3-3F ERX-700 ERX-1400 Mod
Free Shipping – 90 Day Warranty!
Sonus CNA33 1-Port OC3 Adapter GSX9000HD
90 Day Warranty – We Accept Corporate PO’s
Enlarge
Cisco MGX-FRSM-HS2 MGX 8800 Serial Intervace Module
90 Day Warranty – Free Worldwide Shipping!
Cisco MGX-FRSM-HS1/B MGX8800 Frame Service Module
90 Day Warranty – Free Worldwide Shipping!
Cisco BPX-BXM-155-8 – 8-p OC3/STM-1 Module BPX8600
90 Day Warranty – Free Shipping!
Motorola Repeater Cabinet Transmission Equipment
