品牌:SIEMENS
起订:1件
供应:100件
发货:3天内
信息标签:IC200MDL640C,供应,电子、电工,工控系统及装备
IC200MDL640C如果你已经看到我们的产品,建议你拿起电话联系我们吧,
如果你正在找或是需要用上我们的产品,千万不要错过。
即使你不在这个行业,没有用到这些产品,那请你告诉你的朋友们,选择我们吧,一定会共赢!
您有找不到的备品备件也请及时联系我们,只要您想要的,我们都能为您找到并以**惠的价格回报您!
为客户提供**的产品和服务是我们的宗旨,
通过高质量的产品和客户们建立长期的合作关系是我们的想做的!
IC200MDL640C如果你已经看到我们的产品,建议你拿起电话联系我们吧, 如果你正在找或是需要用上我们的产品,千万不要错过。 即使你不在这个行业,没有用到这些产品,那请你告诉你的朋友们,选择我们吧,一定会共赢! 您有找不到的备品备件也请及时联系我们,只要您想要的,我们都能为您找到并以**惠的价格回报您! 为客户提供**的产品和服务是我们的宗旨, 通过高质量的产品和客户们建立长期的合作关系是我们的想做的! IC200MDL640C在我们进行PLC常规设计中,我们以前都是采用输出点为继电器输出,这样可以做到执行机构不同触点信号的需要,比如有的需要交流电压220V、有的需要直流电压、有的就是需要一个无源触点等。在PLC的输出触点的保护,一般采用阻容保护,有的保护都不需要。在市场一般出售的PLC中,继电器输出的占了很大的分量,都是满足技术人员的这种需要。 我门在设计中,深深感觉这种对PLC的选型有很多不妥之处: 1、触点的保护,有的PLC的输出点是直接控制现场的执行机构,比如电磁阀等,而在环境恶劣的工业现场,我们不能不考虑因线路的老化、导线短路造成触点损坏的现象。一旦损坏,就要换PLC输出继电器或者改变触点而对PLC的程序进行修改,这对维护人员都是很麻烦的。 2、触点的浪费,继电器输出的PLC的输出都是成组的,几个输出点一个单端是公用的,这样这组输出的形式必须相同,否则就要用外接继电器转换。而且有时会出现这样的现象,同一动作的两个点由于搭在不同的线路上,要不占用不同组的两个点,要不就用一个点,再用继电器转换。让人感觉别扭。 3、价格的问题,在PLC的规格中,继电器输出的PLC的价格相对晶体管输出的要贵出20% 我们建议采用晶体管输出的PLC,输出点全部外接中间继电器,这样就能够避免以上的问题,维护简单便利,不再考虑修改程序。同时在工程设计中,能够减少对因输出点形式不同发生冲突的考虑,而且能够比较便利合理的分配输出点,从而做到从容设计。 晶体管输出的PLC的价格比较便宜,即使外接中间继电器,也比直接继电器输出的PLC价格要低。★ 联系人:卢军 ★ 电话:0592-5165502 ★ 手机:18030132581 ★ 传真:0592-5165561 ★ 业务QQ:2330203889 ★ Email:2330203889@qq.com ★ 地址:厦门思明区湖滨东路湖光大厦18-A单元 注:如是下班时间请发送电子邮件,24小时之内会给你一个满意的答复,谢谢! |
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