The Acrel ADL200W and ADL400W Smart Energy Meters provide circuit-level energy monitoring for commercial and industrial applications.
The ADL200W supports single-phase systems, while the ADL400W supports three-phase, four-wire systems. Both feature RS485 Modbus RTU for integration with PLCs, HMIs, SCADA and BMS platforms.
Selected WF models offer 2.4 GHz Wi-Fi, while external current transformers support higher-current circuits. Selected configurations are supported by Australian RCM compliance documentation.
TWO CORE ENERGY METER PLATFORMS
The ADL range can be simplified into two main products:
ADL200W — SINGLE-PHASE ENERGY METER
The ADL200W is designed for monitoring single-phase electrical circuits.
Typical applications include:
Commercial electrical circuits
Industrial equipment
Pumps and water systems
HVAC equipment
Control panels
OEM machinery
Solar and battery energy systems
Sub-circuit energy monitoring
Energy-efficiency projects
KEY CAPABILITIES
Single-phase monitoring
230 V AC nominal voltage
External current transformer
Single-circuit or dual-circuit versions
RS485 Modbus RTU communication
Wi-Fi communication on WF models
Modbus TCP / HTTP over Wi-Fi
Voltage measurement
Current measurement
Frequency measurement
Active power
Reactive power
Apparent power
Power factor
Forward and reverse active energy
Forward and reverse reactive energy
Bidirectional energy monitoring
DIN-rail installation
ADL400W — THREE-PHASE ENERGY METER
The ADL400W is designed for monitoring three-phase electrical circuits, feeders and major electrical loads.
It is particularly suited to industrial and commercial switchboards where individual three-phase loads or distribution circuits need to be monitored.
Typical applications include:
Industrial machinery
Production lines
Three-phase pumps and motors
HVAC and mechanical plant
Compressed-air systems
Main distribution boards
Sub-distribution boards
Industrial switchboards
Commercial power distribution
Three-phase solar systems
Battery energy-storage systems
Energy-management projects
KEY CAPABILITIES
Three-phase, four-wire monitoring
3 × 230/400 V AC nominal voltage
External current transformers
Single-circuit or dual-circuit versions
Three CTs per monitored three-phase circuit
RS485 Modbus RTU communication
Wi-Fi communication on WF models
Modbus TCP / HTTP over Wi-Fi
Phase-level voltage and current measurement
Active power
Reactive power
Apparent power
Power factor
Frequency
Forward and reverse active energy
Forward and reverse reactive energy
Bidirectional energy monitoring
DIN-rail installation
SINGLE-CIRCUIT OR DUAL-CIRCUIT MONITORING
One of the useful features of the ADL200W and ADL400W range is the availability of single-circuit and dual-circuit versions.
The model number identifies the number of measurement circuits:
“-1-” = one measurement circuit
“-2-” = two measurement circuits
ADL200W
Because the ADL200W is a single-phase meter:
Single-circuit version uses 1 CT
Dual-circuit version uses 2 CTs
A dual-circuit ADL200W can therefore monitor two separate single-phase loads using one meter.
ADL400W
Because the ADL400W is a three-phase meter:
Single-circuit version uses 3 CTs
Dual-circuit version uses 6 CTs
A dual-circuit ADL400W can therefore monitor two separate three-phase feeders or loads using one meter.
This can reduce the number of individual meters required inside a switchboard.
EXTERNAL CURRENT TRANSFORMER OPTIONS
The ADL200W and ADL400W use external current transformers for current measurement.
Available RCM-covered configurations include CT size designations:
D10
D16
D24
D36
The D-number identifies the CT aperture / physical CT size used for the installation.
Different CT sizes allow the energy meter to be matched to different conductor sizes and current requirements.
APS Technology Australia can assist in selecting the appropriate CT configuration for the required electrical circuit.
RS485 MODBUS RTU COMMUNICATION
Both ADL200W and ADL400W support RS485 Modbus RTU communication.
Key communication specifications include:
Modbus RTU protocol
Device address: 1–247
Baud rates from 1,200 to 38,400 bps
Shielded twisted-pair communication cable recommended
RS485 bus length up to approximately 1,000 metres, subject to correct installation and network design
RS485 connectivity allows the meters to communicate with compatible:
PLC systems
HMI systems
SCADA systems
Building Management Systems
Industrial gateways
Energy-management platforms
Local monitoring systems
Cloud-connected monitoring architectures
Multiple meters can be installed on the same RS485 network when correctly addressed, wired and terminated.
WI-FI COMMUNICATION
Selected WF models incorporate Wi-Fi communication in addition to RS485.
Wi-Fi features include:
2.4 GHz operation
Modbus TCP
HTTP communication
Connection to compatible energy-management systems
Integration with monitoring gateways and network-based platforms
Wi-Fi provides an additional communication option where direct network connectivity is preferred.
COMPREHENSIVE ELECTRICAL MEASUREMENT
The ADL200W and ADL400W provide much more than basic kWh measurement.
Depending on the selected configuration, measured parameters include:
Voltage
Current
Frequency
Active power
Reactive power
Apparent power
Power factor
Active energy
Reactive energy
Forward energy
Reverse energy
The ADL400W additionally provides phase-level electrical information for three-phase systems.
BIDIRECTIONAL ENERGY MONITORING
Both meter families support forward and reverse energy measurement.
This makes the ADL200W and ADL400W suitable for applications where electrical power may flow in either direction.
Typical examples include:
Solar PV systems
Battery energy-storage systems
Distributed energy systems
Import/export energy monitoring
Commercial renewable-energy installations
Forward and reverse monitoring provides improved visibility into both energy consumption and exported energy.
TECHNICAL PERFORMANCE
Parameter | ADL200W | ADL400W |
Electrical system | Single phase | Three-phase, four-wire |
Nominal voltage | 230 V AC | 3 × 230/400 V AC |
Current sensing | External CT | External CT |
Measurement circuits | 1 or 2 | 1 or 2 |
CTs per circuit | 1 | 3 |
RS485 | Yes | Yes |
Protocol | Modbus RTU | Modbus RTU |
Wi-Fi | WF variants | WF variants |
Wi-Fi protocols | Modbus TCP / HTTP | Modbus TCP / HTTP |
Voltage accuracy | ±0.5% | ±0.5% |
Current accuracy | ±0.5% | ±0.5% |
Power accuracy | ±1.0% | ±1.0% |
Active energy accuracy | Class 1 / Class B | Class 1 / Class B |
Response time | 50 ms for voltage, current and power | 50 ms for voltage, current and power |
Installation | DIN rail | DIN rail |
Installation category | CAT III | CAT III |
Protection class | Class II / double insulation | Class II / double insulation |
Front protection | IP51 | IP51 |
Overall enclosure | IP20 | IP20 |
Operating temperature | -25°C to +55°C | -25°C to +55°C |
Conclusion
WHY CHOOSE THE ADL200W & ADL400W?
The ADL200W and ADL400W Smart Energy Meters provide a flexible platform for commercial and industrial energy monitoring.
With only two core meter families, the system can be configured according to:
Single-phase or three-phase application
Single-circuit or dual-circuit monitoring
Required CT size
RS485 or Wi-Fi connectivity requirements
Comprehensive electrical measurement, bidirectional energy monitoring, external CT flexibility and Modbus communication make the ADL range suitable for both standalone circuit monitoring and larger integrated energy-management systems.
APS Technology Australia can assist with selection of the appropriate meter, CT configuration and communication architecture for your application.