描述
屏蔽地(AG,Analog Grounding)也叫模拟地,它可以把现场信号传输时所受到的干扰屏蔽掉,以提高信号精度。DCS系统中信号电缆的屏蔽层应做屏蔽接地。线缆屏蔽层必须一端接地,防止形成闭合回路干扰。铠装电缆的金属铠不应作为屏蔽保护接地,必须是铜丝网或镀铝屏蔽层接地。接入公共接地极。
USON 487A300C REMAN BACKPLANE
ALLEN BRADLEY 900-TC16RGTZ25 NEW 900TC16RGTZ25 SER. A
MODICON 140DAI54000 REMAN
Rotronic Instrument Corp. HygroFlex 1 NIB
MODICON ASB832016 NEW AS-B832-016
CUTLER HAMMER 10316H-10 SWITCH NEW 10316H10
ALLEN BRADLEY 1746-BAS USED 1746BAS SERIES C
ALLEN BRADLEY 1771P7 NEW 1771-P7 SER.B
HONEYWELL BURNER CONTROL RM7800 G 1018 USED RM7800G1018
MODICON AS-B824-016 MODULE REPAIRED ASB824016