AB羅克韋爾PLC模塊詳細(xì)介紹

1769-L32C?羅克韋爾AB PLC模塊及各單元布置與CPU單元相鄰的單元，是特殊單元和輸入單元等干擾產(chǎn)生少的單元。外部電路的電磁接觸器及電器類，其線圈及接點(diǎn)即干擾發(fā)生源，因此應(yīng)與PLC分開配置。（大致在100mm以上）此外模塊是PLC系統(tǒng)的主要部件，需經(jīng)常進(jìn)行調(diào)試維護(hù)，應(yīng)安裝在方便操作的位置。安裝模塊時(shí)自左向右排布，便于擴(kuò)展。信號(hào)線較多，通常選用80mm寬的線槽，機(jī)架上端與線槽的凈距在30mm左右，機(jī)架下端與線槽的凈距在80mm左右。

1769-L32C

1769-L32C?羅克韋爾AB PLC模塊和變頻器屏蔽線的接法原則為防止plc和變頻器之間的控制信號(hào)線受空間電磁場(chǎng)的干擾，可在這些控制信號(hào)線的外層接屏蔽線，以提高系統(tǒng)的抗干擾能力。此種接線一定要注意，對(duì)屏蔽的接地點(diǎn)只能選取一點(diǎn)。不管是在PLC一邊，還是在變頻器的一邊。一般選在信號(hào)接收端，即變頻器一邊。這樣，可提高系統(tǒng)的抗干擾能力。如果屏蔽線在兩端都接地，會(huì)使屏蔽線上有電流流過(guò)，不但不能提高系統(tǒng)的抗干擾的能力，反而會(huì)加重外界對(duì)PLC的干擾。PLC柜型的選擇適用于裝PLC的柜型，通常選用固定柜，且門板為整門的柜型，如KB柜、九折柜和十六折柜等，不宜選GGD柜、固定分割柜、抽屜柜。因?yàn)镻LC柜內(nèi)元件基本上為整板安裝，如果采用了柜門分割的柜型，不便于安裝和調(diào)試。對(duì)于GGD柜如果必須選用時(shí)，需做一下非標(biāo)設(shè)計(jì)，將儀表門、前門和下通風(fēng)門合并成一個(gè)整門，且柜體框架上取消前后橫梁，以便于安裝和維護(hù)。

1769-L32C

AB Rockwell PLC module details

1769-L32C Rockwell AB PLC module and each unit arrangement with the CPU unit adjacent to the unit, is a special unit and input unit and other interference generated less unit. Electromagnetic contactors and electrical appliances of the external circuit, whose coils and contacts are the sources of interference, should be configured separately from the PLC. (roughly more than 100mm) In addition, the module is the main part of the PLC system, which needs to be regularly debugging and maintenance, and should be installed in a convenient location. When installing modules, they are arranged from left to right for easy expansion. Generally, 80mm wide cable slots are used. The clear distance between the upper end of the rack and the cable slots is about 30mm, and the clear distance between the lower end of the rack and the cable slots is about 80mm.
1769-L32C Rockwell AB PLC module and frequency converter shielding line connection principle In order to prevent the control signal line between the plc and the frequency converter from being interfered with the space electromagnetic field, the outer layer of these control signal lines can be connected with shielding lines to improve the anti-interference ability of the system. This connection must be noted that only one point can be selected for the shielded ground point. Whether it is on the PLC side or on the inverter side. Generally selected at the signal receiving end, that is, the frequency converter side. In this way, the anti-interference ability of the system can be improved. If the shielding line is grounded at both ends, the shielding line will have current flow, not only can not improve the anti-interference ability of the system, but will increase the interference of the outside world to the PLC. The selection of PLC cabinet type is suitable for the cabinet type of PLC, usually the fixed cabinet is selected, and the door panel is the cabinet type of the whole door, such as KB cabinet, 10% cabinet and 16% cabinet, etc., it is not appropriate to choose GGD cabinet, fixed partition cabinet, drawer cabinet. Because the components in the PLC cabinet are basically installed as a whole board, if the cabinet type with the cabinet door divided is used, it is not easy to install and debug. For the GGD cabinet, if it must be selected, it is necessary to do a non-standard design, the instrument door, the front door and the lower ventilation door are merged into a whole door, and the front and rear beams are eliminated on the cabinet frame, so as to facilitate installation and maintenance.

1769-L32C