Description
DCS一般都提供统一的数据库。换句话说,在DCS系统中一旦一个数据存在于数据库中,就可在任何情况下引用,比如在组态软件中,在监控软件中,在趋势图中,在报表中……而PLC系统的数据库通常都不是统一的,组态软件和监控软件甚至归档软件都有自己的数据库。为什么常说西门子的S7 400要到了414以上才称为DCS?因为西门子的PCS7系统才使用统一的数据库,而PCS7要求控制器起码到S7 414-3以上的型号。
Nortel Passport 8310 2x 8393SF Ethernet Routing Switch
45 Day Warranty – Free Shipping!
Nokia NIF4450 4Port Gigabit Eth ADP Interface IP1280
90 Day Warranty – Free Worldwide Priority Shipping!
Spirent Adtech AX/4000 400320 OC-48c OC48c STM-16c SM
90 Day Warranty – Free Shipping!
Juniper M5 Router AC PE-1GE-SX M5BASE-AC-E RE-600-512
90 Day Warranty – Free US Shipping!
Extreme Black Diamond 8800 10G4Xa 41612 4-port 10G XFP
90 Day Warranty – Free Overnight Shipping!!!
Alcatel 3EZ00902DB AA01 8-Port Gig LX SFP 7470 Router?
90 Day Warranty – Free Overnight Shipping!
Alcatel OS8-GNI2-C24 Omniswich 8800 2nd Gen 1000BaseT
90 Day Hardware Warranty – Free Overnight Shipping!
Spirent Smartbits SMB-2000 GX-1420B ML-7710 GX-1405Bs
90 Day Warranty – Free Shipping!