ControlNet Fiber Optic Cable
1786-FS60
1786-FS60
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。
※： ※ 公司
Allen-Bradley 厦门泰尼电气有限公司
联系人：小黄（销售代表）
Triconex 固定电话：
FOXBORO QQ:2917675397
ABB 邮箱：2917675397@qq.c o m
SIEMENS 传真：
MOTOROLA 网址：www.xmtaini.c o m
XYCOM 地址：厦门海沧街道滨湖一里7号
Rexroth Indramat 邮编：361026
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