Single Phase Smart Energy Meter with RS485 Modbus and Built-in Relay Prepaid Rental Housing Electricity Metering EM11A043-01

1. Product Introduction

The EM11A043-01 smart energy meter combines accurate electrical measurement with intelligent communication and load control functions. Unlike traditional electricity meters that only display energy consumption locally, this multifunction meter enables remote monitoring and management through RS485 communication.

The integrated relay provides additional control capability, allowing users to remotely disconnect loads or automatically cut off power under abnormal conditions. This makes it an ideal solution for smart buildings, energy management systems, prepaid electricity solutions, and intelligent distribution networks.

Thanks to its compact DIN rail structure, the meter can be easily installed inside electrical distribution boxes, control panels, and energy management cabinets. Its stable performance and IEC standard compliance ensure long-term operation in various power distribution environments.

2. Function Description

2.1 RS485 Communication and Multiple Protocol Support

EM11A043-01 supports RS485 communication, allowing connection with energy management systems, PLC controllers, gateways, and monitoring platforms.

The meter supports three communication protocols:Modbus protocol;DLT645-1997 protocol;DLT645-2007 protocol

Through RS485 communication, users can remotely read electricity consumption data, monitor electrical parameters, configure meter settings, and control relay operation.

2.2 Multifunctional Energy Measurement

The smart meter provides comprehensive electrical parameter measurement, including:Active energy measurement;Reactive energy measurement;Voltage measurement;Current measurement;Active power measurement;Reactive power measurement;Frequency measurement;Power factor measurement;Demand measurement.

2.3 Built-in Relay for Remote Control

The EM11A043-01 integrates a reliable relay that supports remote load control through RS485 communication.

The relay can be used for:Remote power disconnection;Intelligent load management;Abnormal power protection;Energy-saving control applications

When an overload condition occurs, the relay automatically disconnects the circuit. If the overload exceeds 3 seconds, the relay will trip and cannot automatically restore power. The relay can only be closed again through communication settings or by restarting the meter.If the overload condition continues after reconnection, the relay will disconnect again after 3 seconds to ensure electrical safety.

2.4 DIN Rail Installation Design

The compact DIN rail structure makes installation simple and space-saving.

Advantages include:Small size and lightweight design;Easy installation and maintenance;Suitable for standard distribution cabinets;Improved installation flexibility

It is suitable for both new electrical installations and smart upgrades of existing distribution systems.

3. Technical Specifications

Parameter	Description
Model	EM11A043-01
Rated Voltage	AC 220V
Rated Current	5(80)A
Product Type	Single Phase Multifunction Smart Energy Meter
Installation Type	DIN Rail Mounting
Communication Interface	RS485
Communication Protocol	Modbus / DLT645-1997 / DLT645-2007
Display	LCD Display with External Button Operation
Relay Function	Built-in Relay for Remote Disconnect and Load Control
Measurement Parameters	Active Energy, Reactive Energy, Voltage, Current, Active Power, Reactive Power, Frequency, Power Factor, Demand
Communication Functions	Remote Data Reading, Parameter Setting, Relay Control
Overload Protection	Automatic Relay Trip When Overload Exceeds 3 Seconds
Standard Compliance	IEC Standard
Application	Residential and Commercial Power Distribution Systems
Installation Advantage	Compact Size, Lightweight Design, Easy Installation
Main Functions	Energy Monitoring, Intelligent Control, Remote Management
Product Features	High Reliability, Small Size, Low Weight, Modern Design

4. Application Scenarios

Smart Residential Energy Management

The EM11A043-01 can be installed in residential distribution boxes to monitor household electricity consumption and support remote energy management. The RS485 communication function allows integration with smart home systems and energy monitoring platforms.

Commercial Buildings

For offices, shops, and commercial buildings, the meter provides accurate energy measurement and centralized monitoring. Facility managers can analyze electricity usage and improve energy efficiency.

Intelligent Distribution Cabinets

The compact DIN rail design makes the meter suitable for installation in electrical cabinets and control panels where space is limited.

Remote Load Control Systems

With built-in relay control, the meter can be used in applications requiring remote power switching, load management, and abnormal load protection.

FAQ

Q1: What communication protocols does EM11A043-01 support?

The meter supports RS485 communication with Modbus, DLT645-1997, and DLT645-2007 protocols.

Q2: Can the meter be controlled remotely?

Yes. Through RS485 communication, users can remotely read data, configure parameters, and control the built-in relay.

Q3: What happens when an overload occurs?

When overload exceeds 3 seconds, the relay will automatically disconnect the power supply. Manual recovery through communication settings or meter restart is required.

Q4: Can this meter replace a traditional electricity meter?

Yes. It provides the same energy measurement functions as traditional meters while adding communication and remote control capabilities.

Q5: Where can this meter be installed?

The meter is designed for DIN rail installation and can be installed in residential distribution boxes, commercial electrical cabinets, and energy management systems.

Q6: Does the meter support local data checking?

Yes. Users can view important electrical parameters directly through the LCD display by pressing the external button.

EM11A043-01 Single Phase Smart Energy Meter with RS485 Communication and Built-in Relay