1C31233G04模块
1C31233G04模块
1C31233G04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。
*AKD-P02407-NBEC-0000 科尔摩根
*ULSI-11-SW11-C
EC401-51
AAI143-H53
AAR181-S53
AAI141-S53
284G-FVD4P0D-10-RRG-CBG-DB1-EMI
57310001-MP/2
6SL3120-1TE26-0AA3 数量1
6SL3000-0CE15-0AA0 50-100台
2094-BM05-S 面价:46722
5069-L320ER 2面价35061
ABB
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ACS800 AGDR-71C 2
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UNITED TECHNOLOGIES TVD6-200-10BL TVD620010BL
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TOPAZ 97630-21 9763021
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TEKTRONIX 3001GPX 3001GPX
TB WOODS WFC-4050-0CHT WFC40500CHT
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SEW EURODRIVE SF4DT71D4BMGHRASDX3 SF4DT71D4BMGHRAS
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RELIANCE ELECTRIC 29422-V 29422V
RELIANCE ELECTRIC 1KSK06307-WQ 1KSK06307WQ
RELIANCE ELECTRIC 1KSK05412-PQ 1KSK05412PQ
RELIANCE ELECTRIC 0-52837 052837
RELIANCE ELECTRIC 0-51893-1 0518931
PERCEPTRON 9110014 9110014
PCME LTD DM-990 DM990
PACIFIC SCIENTIFIC M5HLON-00115-00 M5HLON0011500
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NSK 7028A5TDBC7P4 7028A5TDBC7P4
NDC P680163 P680163