{"product_id":"dc-communication-box-dc-current-voltage-power-energy-frequency-power-factor-communication-module-meter-with-rs485-usb-interface-high-precision-ammeter-voltmeter-multimeter50a","title":"DC Communication Box, DC Current Voltage Power Energy Frequency Power Factor Communication Module Meter with RS485 USB Interface, High Precision A...","description":"\u003cp\u003eDC Communication Box, DC Current Voltage Power Energy Frequency Power Factor Communication Module Meter with RS485 USB Interface, High Precision Ammeter Voltmeter Multimeter(50A)\u003cbr data-mce-fragment=\"\"\u003e?MULTI-FUNCTION TETER?High test accuracy and better compatibility will make it widely used. It has a strong practical measurement function and accurate measurement of physical parameters. The physical layer adopts UART to RS485 communication interface, the baud rate is 9600, the data bit is 8 bits, the stop bit is 2 bit, no parity.\u003cbr data-mce-fragment=\"\"\u003e?MULTI-FUNCTION TETER?High test accuracy and better compatibility will make it widely used. It has a strong practical measurement function and accurate measurement of physical parameters. The physical layer adopts UART to RS485 communication interface, the baud rate is 9600, the data bit is 8 bits, the stop bit is 2 bit, no parity.\u003cbr data-mce-fragment=\"\"\u003e?MULTI-FUNCTION TETER?High test accuracy and better compatibility will make it widely used. It has a strong practical measurement function and accurate measurement of physical parameters. The physical layer adopts UART to RS485 communication interface, the baud rate is 9600, the data bit is 8 bits, the stop bit is 2 bit, no parity.\u003cbr data-mce-fragment=\"\"\u003e?MEASUREMENT PARAMETERS?Multi-function meter can measure DC voltage, current, active power, frequency and energy consumption. The voltage measurement range is 0.05-300V (When the test voltage is ?7V, please use the independent power supply mode)?The current measuring range: 0.02-300A (Can be matched with 50A, 100A, 200A, 300A four kinds of shunt)?The power measurement range is 0.2-90kW?The energy consumption measuring range is 0-9999kWh.\u003cbr data-mce-fragment=\"\"\u003e?ALARM INDICATION?Alarm indication: over power alarm: active power threshold can be set, when the measured active power exceeds the threshold, an alarm can be issued. The overload alarm function not only protects the instrument from being burnt out, but also serves as a safety protection against fire.\u003cbr data-mce-fragment=\"\"\u003e?APPLICATION LAYER PROTOCOL?The application layer use the Modbus-RTU protocol to communicate.At present, it only supports function codes such as 0x03 (Read Holding Register), 0x04 (Read Input Register), 0x06 (Write Single Register), 0x41 (Calibration), 0x42 (Reset energy).etc.\u003cbr data-mce-fragment=\"\"\u003e?NOTE?RS485 interface is passive output, need external connect 5V power supply and the external power supply should ?100mA.When the input test voltage is less than 7V, it must supply 5V independent work voltage through USB port. Do NOT use the USB port bring by your PC to be the independent power supply, otherwise it may damage your PC.,if you have any problem about the product,please feel free to contaut us,we will reply you in 24 hours.\u003cbr data-mce-fragment=\"\"\u003e\u003cbr data-mce-fragment=\"\"\u003e3.54 x 2.4 x 0.98 inches\u003cbr data-mce-fragment=\"\"\u003e\u003c\/p\u003e\r\n\u003cdiv style=\"\" class=\"\" panel max-height:=\"\"\u003e\r\n\u003cdiv class=\"\" col-xs-12 col-sm-9 col-md-9 col-lg-9\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eFREE standard shipping within the United States(3-6 Days)on all orders!\u003c\/li\u003e\r\n\u003cli\u003e100% money back guarantee for items not delivered or damaged during shipping.\u003c\/li\u003e\r\n\u003cli\u003eSafe and secure checkout with our high quality encryption \u003c\/li\u003e\r\n\u003cli\u003eShipping services: UPS, FedEx, USPS.\u003c\/li\u003e\r\n\u003cli\u003eOnly ship to the lower 48 states, no APO\/FPO addresses or PO Boxes allowed.\u003c\/li\u003e\r\n\u003cli\u003eLocal pickups and combined shipping options are not provided at this time.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/div\u003e\r\n\u003cdiv class=\"col-xs-12 col-sm-3 col-md-3 col-lg-3\"\u003e\r\n\u003cdiv id=\"delivery_right\"\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\u003cp\u003e\u003cbutton class=\"accordion\"\u003eReturn\u003c\/button\u003e\u003c\/p\u003e\r\n\u003cdiv class=\"panel\"\u003e\r\n\u003cdiv class=\"col-xs-12 col-sm-9 col-md-9 col-lg-9\"\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eYou can return a product for up to 30 days from the date you purchased it.\u003c\/li\u003e\r\n\u003cli\u003eAny product you return must be in the same condition you received it and in the original packaging. 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