B830303196模块
B830303196模块
B830303196模块
数字量信号连接应注意的问题
变频器的输入信号中包括对运行/ 停止、正转/ 反转、点动等运行状态进行操作的数字量输入信号(开关型指令信号),这些信号常来自PLC 的数字量输出信号。PLC 通常利用其内部的继电器接点(继电器输出型P L C )或具有开关特性的元器件(晶体管输出型PLC)与变频器相连,得到运行状态指令,如图1 和图2 所示。在进行数字量信号的连接时应注意:
(1)使用继电器输出型P L C 与变频器相连时,应注意接触不良常带来变频器误动作,因此在实际接线中要注意连接可靠。
(2)使用晶体管输出型P L C 与变频器相连时,应注意晶体管本身的电压的高低、电流的大小等限制条件在其范围内,保证系统的可靠性。
(3)设计变频器的输入信号电路时,应尽量避免采用继电器等感性负载,因继电器开闭产生的浪涌电流可能引起变频器的误动作。
(4)当P L C 输出的开关信号进入变频器时,有时会发生外部电源和变频器控制电源之间的串扰,应注意对P L C和变频器分开接地,避免两者使用共同的接地线。
20-750-S3 23 面价2661,接受二手
转接盒85T-P2T5-T5 30 面价2256
3BHB002751R0106 数量1
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TCSESU043F1N0 2
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5008-0BA00-1AB2 15
332-6SB00-0AY0 31
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TSX3721101 1台
JZSP-CSP60-15-E 1
ebmpapst R4D560-AQ03-01 230/400V 50HZ 8.65/5.0A 2380W 1365min 6个
GINT5611 10个
GINT-5611
力士乐电磁阀,Z2FSK6-2-12/2QV 4WE10G50/EG24N9K4/M 1
报警控制器负载板 西门子 FCI2004-A1 数量:2个
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ADEPT TECH 10000-310 10000310