1756-L72 A-B

Enterasys A2H254-16
PROSOFT 5302-MBP-MCM4
ABB PFEA112-65
ABB 3HAC025338-006
BENTLY 3500/44-01-00

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Description

若按下该按钮,则输入继电器X0线圈状态为“0”断电状态,程序中所有X0触点均恢复常态。如果输入继电器连接的输入设备是按钮SB0的常开触点,则情况恰好相反:在该按钮未按下时,输入继电器X0线圈状态为“0”断电状态,程序中所有X0触点均不动作;若按下该按钮,输入继电器X0线圈状态为“1”通电状态,程序中所有X0触点均动作。

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