WiFi + RS485 Smart Single Phase Energy Meter | DIN Rail IoT Electricity Meter with Modbus RTU/TCP

WiFi + RS485 Smart Single Phase Energy Meter | DIN Rail IoT Electricity Meter with Modbus RTU/TCP
Instrument Acquisition

High-Precision Energy Measurement

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Smart Single Phase Energy Meter WiFi RS485 DIN Rail****

1 Product Overview

The DAQ-GP-EMWIFI Single-Phase Energy Monitoring Device is an industrial-grade single-phase power monitoring terminal launched by Shanghai DAQ IoT Co., Ltd. , integrating energy metering and data acquisition with both wireless and wired communication. It is specifically designed for scenarios such as residential electricity usage, single-phase circuits in commercial and industrial settings, smart buildings, small equipment rooms, and distributed single-phase loads. The device can collect real-time electrical parameters including single-phase voltage, current, power, active/reactive energy, power factor, and frequency. It also supports remote data uploading, energy consumption statistics, abnormal condition alerts, and unmanned monitoring.

The device features dual communication channels , combining WiFi wireless connectivity and RS485 wired communication , and is fully compatible with standard Modbus RTU/TCP protocols. It supports both local display and remote platform monitoring , enabling users to access real-time energy data anytime and anywhere.

Designed with low power consumption and a compact DIN-rail mounting structure , the device is ideal for indoor power distribution applications. It offers easy installation, high metering accuracy, and reliable communication performance. The DAQ-GP-EMWIFI can be seamlessly integrated with industrial control systems, cloud platforms, SCADA software, and data acquisition gateways , helping users build a lightweight and intelligent single-phase energy monitoring solution.

2 Service Concept

Our company solemnly promises:

You buy not only the product, but also the meticulous and thoughtful technical support service ! ! ! ( =^_^= )

This product only needs ordinary workers to connect the power and install it on site! No debugging is required!

We provide free remote guidance, remote configuration and debugging services, and send data to the user’s designated cloud platform.

As an expert in industrial data collection, Shucai IoT provides free IoT solution consulting services!

3 Implementation Standard

GB/T17215-2022 General Requirements, Tests, and Test Conditions for AC Measuring Equipment

GB/T19582-2008 Industrial Automation Network Specification Based on Modbus Protocol

GB/T30269-2013Data Transmission Specification for Sensor Networks in Information Technology

4 Product Specifications & Features

4.1 Measurement and Display Characteristics

  • Measurement Type: Single-phase AC full-parameter monitoring, supporting acquisition of voltage, current, active power, reactive power, apparent power, active energy, reactive energy, power factor, and grid frequency.

  • Metering Accuracy: Active and reactive energy accuracy Class 1 (±1%), voltage and current measurement accuracy ±1%.

  • Range Specifications: Rated voltage AC 230V, operating voltage range AC 90–300V; with current transformer (CT) support, maximum input current up to 120A.

  • Data Update Rate: RS485 communication update frequency <50 ms, WiFi communication update frequency <100 ms.

  • Display Method: Equipped with a small LCD screen (optional), displaying all electrical parameters locally in real time with scrolling display.

  • Storage Function: Built-in power-off retention chip, cumulative energy data is not lost during power outages, supports local historical electricity data caching.

4.2 Electrical Characteristics

  • Power Supply: Powered directly from the monitored single-phase AC circuit, requiring no additional external power supply.

  • Operating Frequency: Automatic adaptation to both 50Hz and 60Hz power systems.

  • Power Consumption: Ultra-low power design with total device power consumption of less than 1W during normal operation.

  • Terminal Type: Equipped with spring-loaded quick-connect terminals for tool-free wiring, ensuring secure connections and resistance to loosening caused by vibration.

  • Overload Capacity: Supports continuous operation at 120% of the rated voltage and current , with the ability to withstand short-term overload surges and transient impacts.

4.3 Communication Characteristics

(1) RS485 Wired Communication

  • Communication Protocol: Standard Modbus RTU

  • Address Range: Configurable from 1 to 247

  • Transmission Mode: Half-duplex

  • Baud Rate: Adjustable from 2400 bps to 115200 bps

  • Parity Check: Supports EVEN, ODD, or NONE

  • Stop Bits: Configurable as 1 or 2 bits

  • Maximum Communication Distance: Up to 1000 meters for wired transmission

  • Data Format: Standard floating-point output, compatible with mainstream industrial control devices

(2) WiFi Wireless Communication

  • Communication Protocol: Standard Modbus TCP

  • RF Specification: Operates in the 2.4 GHz–2.5 GHz frequency band and complies with IEEE 802.11 b/g/n wireless standards.

  • Transmit Power: Less than 20 dBm , ensuring low-radiation and regulatory-compliant operation.

  • Communication Range: Effective indoor range up to 30 meters ; outdoor range can reach 50 meters in open environments, depending on obstacles and site conditions.

  • Network Connection Mode: Supports STA (Station) Mode for connection to local WiFi routers, with both DHCP automatic IP assignment and manual IP configuration.

  • Data Reporting: Supports simultaneous connections to multiple hosts and platforms , enabling concurrent real-time data transmission and monitoring.

4.4 Mechanical & Structural Characteristics

  • Housing Material: Made of flame-retardant engineering plastic , providing excellent electrical insulation, high-temperature resistance, and long-term durability against aging.

  • Installation Method: Supports standard DIN-rail mounting (compatible with conventional distribution cabinets and DIN rails), with optional wall-mount installation.

  • Dimensions: 1-module width (19 mm) compact design, minimizing panel space requirements and allowing efficient installation in crowded distribution boxes.

  • Protection Rating: IP51 , providing protection against dust ingress and water droplets, suitable for indoor distribution panels, control cabinets, and equipment rooms.

  • Design Features: Compact and slim-profile housing with an organized layout, enabling high-density installation in electrical distribution systems.

4.5 Working Environment

  • Operating Temperature: -40℃ to +70℃

  • Storage Temperature: -40℃ to +85℃

  • Operating Humidity: 0~95% RH (non-condensing)

  • Operating Altitude: up to 2000 meters

  • Pollution Degree: 2, suitable for standard industrial and residential power distribution scenarios

5 Core Product Advantages

  • Dual Communication Links, Flexible Networking: WiFi wireless + RS485 wired dual-backup communication, combining the convenience of wireless with the stability of wired, adaptable to different on-site networking needs.

  • High-Precision Measurement, Reliable Data: Equipped with a dedicated energy metering chip, achieving full-parameter accuracy standards, suitable for commercial, industrial, and residential electricity statistics and energy consumption accounting.

  • Standard Industrial Protocols, Strong Compatibility: Dual Modbus RTU/TCP protocol output, can directly interface with PLCs, SCADA software, industrial gateways, and IoT cloud platforms—plug and play.

  • Ultra-Low Power Consumption, Energy-Saving & Durable: Total device power consumption under 1W, long-term operation without additional energy costs, with extended component lifespan.

  • Minimal Installation, Low Construction Cost: Standard DIN-rail design + spring terminal connectors, allowing electricians with minimal experience to wire quickly, no complex cabling required.

  • Remote Maintenance-Free Management: Supports remote parameter configuration, WiFi network setup, firmware upgrades, and online troubleshooting without on-site operations.

  • Intelligent Abnormality Alerts: Customizable voltage, current, and power thresholds; automatically uploads alert information when parameters exceed limits, preventing electrical risks.

  • Wide Temperature and Voltage Adaptability: Ultra-wide operating temperature and voltage range, stable operation in high/low temperature and voltage fluctuation environments.

6 Application Scenarios

  • Residential Scenarios: Whole-house electricity monitoring, sub-metering for rental units, energy consumption monitoring of single-phase loads in villas.

  • Commercial & Industrial Scenarios: Single-phase circuit metering for shops and stores, electricity monitoring for office equipment, sub-metered energy management in office buildings.

  • New Energy Scenarios: Bidirectional monitoring of household distributed photovoltaic single-phase branch generation and consumption.

  • Data Center / Equipment Scenarios: Single-phase UPS and server power circuit monitoring in small data centers, single-phase power status monitoring for automated equipment.

  • Water, Heating & Security Systems: Remote electricity collection and status monitoring for single-phase water pumps, fans, and security devices.

  • Smart Buildings: Intelligent energy collection and management for single-phase power circuits and public area lighting in buildings.

7 Installation Notes

· Wiring Safety: Ensure the main power supply is completely disconnected before installation. Connect live and neutral wires strictly according to the wiring labels. Miswiring and short circuits are strictly prohibited. Current transformer (CT) wiring must match specifications and polarity must not be reversed.

· Installation Location: Prefer installation inside standard indoor distribution boxes on a DIN rail. Keep away from strong electromagnetic devices (such as inverters and high-power contactors) to avoid signal interference.

· Environmental Requirements: Designed for indoor use only. Do not install outdoors. Keep away from high temperatures, water exposure, and corrosive gases.

· Communication Wiring: RS485 communication lines should use shielded twisted-pair cables. Route wiring away from high-voltage power cables to reduce interference. For WiFi models, place the device as close as possible to the wireless router and avoid heavy wall obstruction.

· Parameter Configuration: After powering on, parameters such as communication address, baud rate, WiFi SSID/password, and alarm thresholds can be configured via local buttons or remote access.

· Load Matching: Strictly match the current transformer according to the device’s rated range. Do not operate under long-term overload conditions to prevent damage.

· Routine Inspection: Regularly check whether terminals are loose and whether dust has accumulated on the device body. Keep proper ventilation to ensure stable operation.