PM858是一种模拟量输入模块， 它可以将模拟信号转换为数字信号，以便在I业自动化系统中进行监测、控制和调节。具体来说，PM858模块具有以下特点:高精度:采用高精度ADC芯片，确保模拟量和数字量的转换精度。多种输入类型:支持多种模拟量输入类型，如电压、电流等,方便用户在不同场合下使用。隔离保护:采用光电隔离技术，确保输入和输出之间的隔离，提高系统的稳定性和可靠性。易于安装和维护:采用标准导轨安装方式，方便用户进行安装和维护。
PM858
CPU 板包含微处理器和 RAM 存储器、实时时钟、LED 指示灯、INIT 按钮和 CompactFlash 接口。PM858 控制器的底板有两个用于连接控制网络的 RJ45 以太网端口（CN1、CN2）和两个 RJ45 串行端口（COM3、COM4）。其中一个串行端口 (COM3) 是带有调制解调器控制信号的 RS-232C 端口，而另一个端口 (COM4) 是隔离的，用于连接配置工具。该控制器支持 CPU 冗余，以实现更高的可用性（CPU、CEX-Bus、通信接口和 S800 I/O）。
PM858
PM858 is an analog input module that can convert analog signals into digital signals for monitoring, control, and regulation in industrial automation systems. Specifically, the PM858 module has the following characteristics: high precision: using high-precision ADC chips to ensure the conversion accuracy between analog and digital quantities. Multiple input types: Supports multiple analog input types, such as voltage, current, etc., making it convenient for users to use in different situations. Isolation protection: Using photoelectric isolation technology to ensure isolation between input and output, improving system stability and reliability. Easy to install and maintain: Adopting standard rail installation method, it is convenient for users to install and maintain.
PM858
The CPU board includes a microprocessor and RAM memory, a real-time clock, LED indicators, INIT buttons, and a CompactFlash interface. The motherboard of the PM858 controller has two RJ45 Ethernet ports (CN1, CN2) for connecting to the control network and two RJ45 serial ports (COM3, COM4). One of the serial ports (COM3) is an RS-232C port with a modem control signal, while the other port (COM4) is isolated and used to connect configuration tools. This controller supports CPU redundancy to achieve higher availability (CPU, CEX-Bus, communication interface, and S800 I/O).
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