5136-RE2-PCI  PLC输出模块内的小型继电器

Description

5136-RE2-PCI  PLC输出模块内的小型继电器

PLC输出模块内的小型继电器的触点很小，断弧能力很差，不能直接用于厂级～220V～380V电路中，必须用PLC驱动外部继电器，用外部继电器的触点驱动～380v的负载。同时较多的AC220V～380V电磁阀内部有与其线圈串联的限位开关常闭触点，电磁阀线圈通电，阀芯动作后，是用阀内部的触点来断开电路的。在这种情况下，要选用触点较小的小型继电器来转接PLC的输出信号。本系统中用到了大功率可控硅装置，PLC应远离强干扰源。PLC不能与高压电器安装在同一个开关柜内，在柜内PLC应远离动力线(二者之间的距离应大于200mm)。与PLC装在同一个开关柜内的电感性元件，如继电器、接触器的线圈，应并联RC消弧电路。PLC的I/O线与大功率线应分开走线，如必须要在同一线槽中布线，信号线应使用屏蔽电缆。交流线与直流线应分别使用不同的电缆，开关量、模拟量I/O线应分开敷设，后者应采用屏蔽线。不同类型的线应分别装入不同的电缆管或电缆槽中，并使其有尽可能大的空间距离，由于本系统CC－bbbb要完成所有数据通信，因此对通信电缆要求可靠性高应选用CC－bbbb推荐并提供的专用电缆。

5136-RE2-PCI  PLC输出模块内的小型继电器

The contact of the small relay in the PLC output module is very small, the arc breaking ability is very poor, can not be directly used in the factory level ~ 220V ~ 380v circuit, PLC must be used to drive the external relay, and the contact of the external relay drives the load of ~ 380v. At the same time, more AC220V ~ 380V solenoid valves have a limit switch normally closed contact in series with its coil, and the solenoid valve coil is energized, and after the spool action, the contact inside the valve is used to disconnect the circuit. In this case, a small relay with smaller contacts should be used to transfer the output signal of the PLC. This system uses high-power thyristor device, PLC should be away from strong interference sources. PLC can not be installed in the same switch cabinet with high voltage appliances, and the PLC should be far from the power line in the cabinet (the distance between the two should be greater than 200mm). The inductive components installed in the same switch cabinet with the PLC, such as relays and contactor coils, should be connected to the RC arc suppression circuit. The PLC I/O line and the high-power line should be separated from the line, if it must be routed in the same slot, the signal line should use a shielded cable. Ac line and DC line should use different cables, switching quantity, analog quantity I/O line should be laid separately, the latter should use shielding line. Different types of lines should be loaded into different cable tubes or cable slots, and make it as large a space distance as possible, because the system CC-bbbb to complete all data communication, so the communication cable requirements for high reliability should be selected CC-bbbb recommended and provided special cables.