价格:888.00/个
品牌:AB 施耐德 GE电气
起订:1个
供应:8个
发货:3天内
信息标签:121-035109-01,供应,电子、电工,工控系统及装备

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121-035109-01
38-804900-02
在控制系统逻辑关系较复杂（需要大量中间继电器、时间继电器、计数器等）、工艺流程和产品改型较频繁、需要进行数据处理和信息管理（有数据运算、模拟量的控制、 PID 调节等）、系统要求有较高的可靠性和稳定性、准备实现工厂自动化联网等情况下，使用 PLC 控制是很必要的
为了确保整个系统能在安全状态下可靠工作，避免由于外部电源发生故障、PLC出现异常、误操作以及误输出造成的重大经济损失和人身伤亡事故，PLC外部应安装必要的保护电路。
（1）急停电路。对于能使用户造成伤害的危险负载，除了在控制程序中加以考虑之外，还应设计外部紧急停车电路，使得PLC发生故障时，能将引起伤害的负载电源可靠切断。　　 （2）保护电路。正反向运转等可逆操作的控制系统，要设置外部电器互锁保护；往复运行及升降移动的控制系统，要设置外部限位保护电路。
（3）可编程控制器有监视定时器等自检功能，检查出异常时，输出全部关闭。但当可编程控制器CPU故障时就不能控制输出，因此，对于能使用户造成伤害的危险负载，为确保设备在安全状态下运行，需设计外电路加以防护。
（4）电源过负荷的防护。如果PLC电源发生故障，中断时间少于10秒，PLC工作不受影响，若电源中断超过10秒或电源下降超过允许值，则PLC停止工作，所有的输出点均同时断开；当电源恢复时，若RUN输入接通，则操作自动进行。因此，对一些易过负载的输入设备应设置必要的限流保护电路。
（5）重大故障的报警及防护。对于易发生重大事故的场所，为了确保控制系统在重大事故发生时仍可靠的报警及防护，应将与重大故障有联系的信号通过外电路输出，以使控制系统在安全状况下运行。
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联系人：李涛（销售一部经理）
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④提供嵌入式系统备件!
⑤各种大型进口DCS系统备品，备件。
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AUTOMATION PRODUCTS CL-10-DJ7T DYNATROL DETECTOR CL-10DJ7T
LOVEJOY 5JE COUPLING SLEEVE
RELIANCE ELECTRIC FIELD REGULATOR 57412-D
SLOAN A-38-A REPAIR KIT A38A
FESTO MEBH-5/3G-1/8-P-B SOLENOID VALVE 173018 MEBH53G18PB
HonEYWELL 51305348-100 MODULE 51305348100
SIEMENS 6ES7-322-1FL00-0AA0 OUTPUT MODULE 6ES73221FL000AA0
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SCHNEIDER ELECTRIC TPMXP67455R PROCESOR EXCHANGE/REPAIR HE
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NORDSON 1062017A SOLENOID VALVE 1062017
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HYSTER 79880 DRIVE
10 MILLER ELECTRIC 095-621 ASSEMBLY 095621