中海德(福建)工业设备有限公司
【联系人】 陈小真
【联系电话】18005006971 / 0591-83566917
【联系qq】2851617312
【传真】0591-83489960
【上门取货】 地址:福建省福州市高新区乌龙江大道正荣财富中心B座八层
DCS系统通常采用若干个控制器(过程站)对一个生产过程中的众多控制点进行控制,各控制器间通过网络连接并可进行数据交换。操作采用计算机操作站,通过网络与控制器连接,收集生产数据,传达操作指令。从结构上划分,DCS包括过程级、操作级和管理级。过程级主要由过程控制站、I/O单元和现场仪表组成,是系统控制功能的主要实施部分。操作级包括:操作员站和工程师站,完成系统的操作和组态。
DCS控制系统在现场接地时一定要严格按照DCS厂商的接地规范严格接地,否则会影响DCS系统的可靠性。对DCS系统现场接地时应注意以下几点:
(1) I/O柜的电源地与UPS电源地必须接至同一个地,保证等电位。
(2) 接地电缆必须符合DCS厂商的要求,并要接到机柜内专用的接地螺丝上。
(3) 系统接地与屏蔽接地不能在机柜汇合,必须单独接入到接地网。
(4) 柜间接地不能用机柜并接螺栓代替,必须用接地线严格连接。
(5) 接地要牢固可靠,汇流连接板并要涂防腐漆。
(6) 接地电阻符合DCS系统要求,并要进行严格的测定。
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