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。
3 P&H HARNISCHFEGER 79U79 STABILITY MODULE
3 P&H HARNISCHFEGER 79U6D4 BIAS MODULE
METRIC METAL WORK GAS METER IC-1260
ECONO LIFT TR20 TOTE BOX TILTER
FOXBORO 136-1 COMPUTING RELAY
INSUL 8 EQC33B-7 POWEREEL
MOHEAER M4938 BEARING SUPPORT
MOHELLER M4248 KNIFE HOUSING
BARRETT 100-2 REFRACTORY ANCHOR