Multifunctional network electric power meter

The utility model discloses a multifunctional network electric power meter comprising a main control chip which comprises an ARM processor, a FLASH memory, an RAM memory, an AD converter, a USART serial communication port, a PWM output circuit, an SPI peripheral interface, an I2C peripheral interface and an IO control port. The main control chip is provided with a CPU circuit, a power supply acquisition circuit, an analog quantity conditioning circuit, a communication circuit, a switching value input circuit, a relay output circuit, a 4-20mA transmitting output circuit, a ferroelectric clock circuit and a man-machine interaction circuit. The requirement of fast fault isolation can be met, action time consumption is short, and the requirements of a current and voltage relay for rapidity and high anti-interference performance can be met. 本实用新型公开了一种多功能网络电力仪表，包括：主控芯片，所述主控芯片包括ARM处理器、FLASH存储器、RAM存储器，AD转换器，USART串口通讯口、PWM输出电路、SPI外设接口、I2C外设接口和IO控制口，所述主控芯片设置有CPU电路、电源获取电路、模拟量调理电路、通信电路、开关量输入电路、继电器输出电路、4-20mA变送输出电路、铁电时钟电路