APM521高精度电表，UL认证解锁北美市场

APM521网络电力仪表（以下简称仪表）按IEC国际标准设计，具有全电量测量、电能统计、电能质量分析事件记录功能及网络通讯等功能，主要用于电网供电质量的综合监控。该系列仪表配有功能丰富的DI/DO模块、AO模块，可以灵活实现电气回路全电量测量及开关状态监控。

The APM521 network power meter (hereinafter referred to as the meter) is designed according to IEC international standards, featuring full electrical quantity measurement, energy statistics, power quality analysis, event logging functions, and network communication capabilities. It is primarily used for comprehensive monitoring of power supply quality in power grids. This series of meters is equipped with DI/DO modules and AO modules that offer a wealth of functions, allowing for flexible implementation of full electrical quantity measurement and monitoring of switch statuses in electrical circuits.

多功能性：支持四象限电能、谐波分析、需量统计、事件记录等，满足多样化电力监测需求。

精度高：电压、电流测量误差±0.2%，电能计量符合D级标准，确保数据准确性。

灵活安装：提供嵌入式、导轨式等多种安装方式，适配不同场景需求。

安全可靠：通过UL、CE等认证，符合CATⅢ/CATⅡ安全标准，具备过载保护和双重绝缘设计。

通信便捷：支持Modbus-RTU、DL/T 645-2007等多种协议，兼容RS485和以太网通信，便于系统集成。

扩展性强：可选配DI/DO模块、AO模块，实现开关状态监控和模拟量输出，满足定制化需求。适用于工业、商业及电力系统，提供准确的电力监控解决方案。

Versatility: Supports four-quadrant energy measurement, harmonic analysis, demand statistics, event recording, and more, meeting diverse power monitoring needs.

High Accuracy:  Voltage and current measurement error within ±0.2%, with energy measurement complying with Class D standards, ensuring data accuracy.

Flexible Installation: Offers multiple installation methods, including embedded and DIN rail mounting, to adapt to different application scenarios.

Safety and Reliability: Certified by UL, CE, and others, compliant with CAT III/CAT II safety standards, featuring overload protection and double insulation design.

Convenient Communication:  Supports multiple protocols such as Modbus-RTU and DL/T 645-2007, compatible with RS485 and Ethernet communication for easy system integration.

Strong Expandability: Optional DI/DO and AO modules for switch status monitoring and analog output, meeting customized requirements. Suitable for industrial, commercial, and power systems, providing accurate power monitoring solutions.