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。
Safemaster B05988 contactor
SafeMaster Model: B05988 Safety Relay K
DOLD Safemaster BN5983.53 Safety Relay NIB
SAFEMASTER BN5989 EMERGENCY STOP SAFETY RELAY
Safemaster Safety Relay Emergency Stop – BN5983.53
SAFEMASTER BD5980N CONTACTOR
Nice Dold Safemaster Safety Relay Emergency Stop
SAFEMASTER BN5983 EMERGENCY STOP SAFETY RELAY
EMERGENCY STOP RELAY SAFEMASTER BN 5930.48 NEW
