A-B 1769-L32C PLC及各单元布置与CPU单元相邻的单元，是特殊单元和输入单元等干扰产生少的单元。外部电路的电磁接触器及电器类，其线圈及接点即干扰发生源，因此应与PLC分开配置。（大致在100mm以上）此外模块是PLC系统的主要部件，需经常进行调试维护，应安装在方便操作的位置。安装模块时自左向右排布，便于扩展。信号线较多，通常 80mm宽的线槽，机架上端与线槽的净距在30mm左右，机架下端与线槽的净距在80mm左右。
1769-L32C
PLC和变频器屏蔽线的接法原则为防止plc和变频器之间的控制信号线受空间电磁场的干扰，可在这些控制信号线的外层接屏蔽线，以提高系统的抗干扰能力。此种接线一定要注意，对屏蔽的接地点只能选取一点。不管是在PLC一边，还是在变频器的一边。A-B 1769-L32C PLC模块一般选在信号接收端，即变频器一边。这样，可提高系统的抗干扰能力。如果屏蔽线在两端都接地，会使屏蔽线上有电流流过，不但不能提高系统的抗干扰的能力，反而会加重外界对PLC的干扰。
1769-L32C
PLC柜型的选择适用于装PLC的柜型，通常 固定柜，且门板为整门的柜型，如KB柜、九折柜和十六折柜等，不宜选GGD柜、固定分割柜、抽屉柜。因为PLC柜内元件基本上为整板安装，如果采用了柜门分割的柜型，不便于安装和调试。A-B 1769-L32C PLC模块对于GGD柜如果必须 时，需做一下非标设计，将仪表门、前门和下通风门合并成一个整门，且柜体框架上取消前后横梁，以便于安装和维护。
1769-L32C
The A-B 1769-L32C PLC and its units are arranged adjacent to the CPU unit, which are units with less interference such as special units and input units. The coils and contacts of electromagnetic contactors and electrical appliances in external circuits are the sources of interference, so they should be configured separately from the PLC. In addition, the module is the main component of the PLC system and requires frequent debugging and maintenance. It should be installed in a convenient location for operation. When installing modules, they are arranged from left to right for easy expansion. There are many signal lines, usually with a 80mm wide slot. The clear distance between the upper end of the rack and the slot is about 30mm, and the clear distance between the lower end of the rack and the slot is about 80mm.
1769-L32C
The principle of connecting shielded wires between PLC and frequency converter is to prevent the control signal wires between PLC and frequency converter from being interfered by spatial electromagnetic fields. Shielded wires can be connected to the outer layer of these control signal wires to improve the anti-interference ability of the system. Attention must be paid to this type of wiring, and only one point can be selected for the grounding point of the shield. Whether on the PLC side or on the frequency converter side. The A-B 1769-L32C PLC module is generally selected at the signal receiving end, that is, the frequency converter side. This can improve the system’s anti-interference ability. If the shield wire is grounded at both ends, it will cause current to flow through the shield wire, which not only fails to improve the system’s anti-interference ability, but also exacerbates external interference with the PLC.
1769-L32C
The selection of PLC cabinet type is applicable to the cabinet type installed with PLC, usually fixed cabinet, and the door panel is a whole door cabinet type, such as KB cabinet, 90 fold cabinet, and 16 fold cabinet, etc. It is not suitable to choose GGD cabinet, fixed partition cabinet, or drawer cabinet. Because the components inside the PLC cabinet are basically installed as a whole board, if a cabinet type with a split cabinet door is used, it is not convenient for installation and debugging. If necessary, the A-B 1769-L32C PLC module needs to be designed non-standard for the GGD cabinet. The instrument door, front door, and lower ventilation door should be merged into a single door, and the front and rear crossbeams should be removed from the cabinet frame for easy installation and maintenance.
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