1762-OF4
1762-OF4
1762-OF4
PLC是一种用于工业生产自动化控制的设备,一般不需要采取什么措施,就可以直接在工业环境中使用。然而,尽管有如上所述的可靠性较高,抗干扰能力较强,但当生产环境过于恶劣,电磁干扰特别强烈,或安装使用不当,就可能造成程序错误或运算错误,从而产生误输入并引起误输出,这将会造成设备的失控和误动作,从而不能保证PLC的正常运行。要提高PLC控制系统可靠性,一方面要求PLC生产厂家提高设备的抗干扰能力;另一方面,要求设计、安装和使用维护中引起高度重视,多方配合才能完善解决问题,有效地增强系统的抗干扰性能。因此在使用中应注意以下问题:
(1)温度:PLC要求环境温度在0~55℃,安装时不能放在发热量大的元件下面,四周通风散热的空间应足够大。
(2)湿度:为了保证PLC的绝缘性能,空气的相对湿度应小于85%(无凝露)。
(3)震动:应使PLC远离强烈的震动源,防止振动频率为10~55 Hz的频繁或连续振动。当使用环境不可避免震动时,必须采取减震措施,如采用减震胶。
(4)空气:避免有腐蚀和***的气体,例如化学的酸碱等。对于空气中有较多粉尘或腐蚀性气体的环境,可将PLC安装在封闭性较好的控制室或控制柜中。例如电厂的干排渣、干除灰等,在基建后期增加了封闭小屋。
(5)电源:PLC对于电源线带来的干扰具有一定的***能力。在可靠性要求很高或电源干扰特别严重的环境中,可以安装一台带屏蔽层的隔离变压器,以减少设备与地之间的干扰。一般PLC都由直流24 V输出提供给输入端,当输入端使用外接直流电源时,应选用直流稳压电源。因为普通的整流滤波电源,由于纹波的影响,容易使PLC接收到错误信息。
备货,备货,降降降,火火火,火火火……
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公司名称:厦门泰尼电气有限公司
联系人:小黄(销售代表)
联系电话:0592-6809319
传真号码:0592-6890859(麻烦备注01006收)
手机:18950191386
***号码:2917675397
邮箱:2917675397@***.com
诚信经营,质量为首,诚信至上,泰尼电气小黄竭诚为您服务!!!
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