简要说明：PHOENIX牌的CONTACT 2867102产品：估价：2000，规格：CONTACT 2867102，产品系列编号：CONTACT 2867102

　　 2.1 主控、辅佐体系输入/输出继电器以及操控继电器的选用 
输入/输出信号的牢靠性是操控体系正常作业的基本条件，没有牢靠的体系输入/输出信号，再好的操控体系也无法正常作业。因为各技术段子体系较多，十分涣散且现场条件恶劣，其中现场信号遭到搅扰，致使继电器无法正常作业即是十分棘手的疑问之一，因此，为确保设备正常作业，其输入/输出信号继电器的挑选即是关键所在。为处理以上疑问，马钢通过多方对比，最终选用PHOENIXCONTACT的PLC-RSC- 230UC/21/SO46、 PLC-RSC-230UC/21-21/SO46抗搅扰继电器以及PLC-RSC-24DC/21、PLC-RSC-24DC/21直流继电器。挑选PLC-RSC-230UC/21/SO46、 PLC-RSC-230UC/21-21/SO46抗搅扰继电器的理由主要有两点：其一是该继电器驱动电流较大（通常为8mA左右）而且具有信号滤波功用，并选用RC 回路以及抬高继电器的动作电平来按捺搅扰信号，其特别适用于现场检查元件较远，以及因为现场挨近开关或PLC模块漏电流较大等因素致使普通继电器难以正常作业的各种杂乱的工业操控现场；第二是该继电器为端子型继电器，体积较小，可有用地节省装置空间而且易于装置和接线。马钢新区项目中，共运用PHOENIXCONTACT的PLC系列继电器30000多只，为现场开关量牢靠的输入/输出供给了有用确保。

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