Stratix 2000 4+1 port unmanaged switch
1783-US4T1F
1783-US4T1F
◆ 企业名称：厦门泰尼电气有限公司
◆ 主营业务：DCS,PLC
◆ 经营模式： 贸易
◆ 贸易地区：
◆ 联系人： 小黄《女士》
◆ 电话：
◆手机：
◆ QQ:2917675397
◆ 传真： （备注“01006”收）
◆ E-mail： 2917675397@qq.com
根据生产工艺要求，分析被控对象的复杂程度，进行I/O点数和I/O点的类型（数字量、模拟量等）统计，列出清单。适当进行内存容量的估计，确定适当的留有软硬件资源余量而不浪费资源的机型（小、中、大型机器）。
根据PLC输出端所带的负载是直流型还是交流型，是大电流还是小电流，以及PLC输出点动作的频率等，从而确定输出端采用继电器输出，还是晶体管输出，或品闸管输出。不同的负载选用不同的输出方式，对系统的稳定运行是很重要的。
电磁阀的开闭、大电感负载、动作频率低的设备，PLC输出端采用继电器输出或者固态继电器输出;各种指示灯、变频器/数字直流调速器的启动/停止应采用晶体管输出。
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