目前，随着大规模和超大规模集成电路等微电子技术的发展，PLC已由最初一位机发展到现在的以16位和32位微处理器构成的微机化PC，而且实现了多处理器的多通道处理。如今，PLC技术已非常成熟，不仅控制功能增强，功耗和体积减小，成本下降，可靠性提高，编程和故障检测更为灵活方便，而且随着远程I/O和通信网络、数据处理以及图象显示的发展，使PLC向用于连续生产过程控制的方向发展，成为实现工业生产自动化的一大支柱。如今在各个行业的智能制造时代，PLC技术的发展呈现出产品规模两极发展、通信网络化、模块化与智能化、编程语言/工具的多样化和标准化等新的特点，并与新兴技术结合，将进一步赋能数字化企业和智能工厂。
而三菱电机FX产品则因其良好的性能及丰富的产品线备受小型PLC市场用户欢迎。新一代iQ-FX5UJ，程序容量为48KStep，控制规模达256点，并具有简单CPU通信、数据记录等内置功能。iQ-F系列安全扩展模块是该系列重要的组成部分，产品规格主要分为安全主模块和安全输入扩展模块两种，安全主模块执行安全控制，可连接到iQ-F的总线，安全扩展模块可与一般控制的电源分离单独运转。在实际应用中，安全模块会根据不同的机械类型设定不同的安全控制模式，以确保操作员的安全。
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