News
Aug 21, 2026
Smart Energy Monitoring with Single- and Three-Phase RS485 Energy Meters / WiFi
Energy costs continue to rise across commercial buildings and industrial facilities, yet many organisations still rely on a single utility meter or monthly electricity bill to understand consumption.
While this shows total energy use, it does not reveal which machines, pumps, HVAC systems, production lines or building services are driving demand.
Circuit-level energy monitoring provides a clearer picture by measuring electricity closer to where it is actually being used.
The APS Technology ADL200N/ADL200M Single-Phase RS485 Energy Meter and ADL400N/ADL400M Three-Phase RS485 Energy Meter provide practical options for monitoring both single- and three-phase electrical circuits.
With RS485 Modbus RTU communication, they can integrate into PLCs, HMIs, SCADA systems, Building Management Systems and energy-monitoring platforms.
Why Circuit-Level Energy Monitoring Matters
Monitoring only the main incoming supply provides limited visibility into how individual systems are performing.
Circuit-level monitoring can help answer questions such as:
Which machine or production line uses the most energy?
Are pumps or HVAC systems operating outside scheduled hours?
Has equipment energy consumption increased over time?
Which building services are contributing most to demand?
Has an energy-efficiency upgrade delivered measurable savings?
How much energy is being imported or exported through solar or battery systems?
This allows facility managers and operators to make decisions using actual electrical data rather than estimates.
Single-Phase and Three-Phase Monitoring
Most facilities contain a mixture of electrical loads, which means a complete monitoring system may require both single- and three-phase meters.
The ADL200N/ADL200M is designed for suitable single-phase applications such as:
Small pumps
Lighting circuits
Single-phase machinery
Office and retail circuits
Small tenancies
Single-phase solar systems
Selected EV charging circuits
The meter supports 230 V AC single-phase networks, external CT options, DIN-rail installation and RS485 Modbus RTU communication.
The ADL400N/ADL400M is suited to larger three-phase loads including:
Industrial machinery
Production lines
Pumps
Compressors
HVAC systems
Main and sub-distribution boards
Three-phase solar installations
EV charging infrastructure
Generator and backup systems
The supplied product documentation identifies a typical three-phase, four-wire configuration with 3 × 230/400 V AC, external CT options and phase-level information on supported models.
Together, these meter families allow monitoring to be applied throughout a facility according to the type of electrical load.
More Than a kWh Meter
Both meter ranges provide more than basic energy consumption data.
Depending on the selected model and configuration, monitored parameters can include:
Voltage
Current
Active power
Reactive power
Apparent power
Power factor
Frequency
Forward and reverse active energy
Forward and reverse reactive energy
Phase-level information on supported three-phase models
RS485 Modbus RTU communication allows this information to be transferred into wider automation or energy-management systems rather than remaining only at the switchboard.
Practical Applications
Industrial Machinery and Production Lines
Energy meters can be installed on individual machines or production-line feeders to monitor electrical demand over time.
This can help identify:
Abnormal loading
After-hours operation
Changes following maintenance
High energy use compared with production output
Differences between machines or production lines
Three-phase equipment will generally suit the ADL400N/ADL400M, while appropriate smaller single-phase equipment may use the ADL200N/ADL200M.
Pumps and Water Systems
Pump monitoring is another important application.
Electrical data can be combined with flow, pressure and level measurements to help operators understand how efficiently pumping systems are operating.
This can assist with identifying increased loading, excessive running time, unexpected operation or changes in the energy required to move the same volume of water.
Commercial Buildings and HVAC
Commercial facilities often contain a combination of single- and three-phase loads.
Typical monitoring points include:
Lighting circuits
HVAC systems
Mechanical services
Data rooms
Lifts
Commercial kitchens
Tenant distribution boards
EV charging systems
Three-phase meters may be installed at larger distribution boards and major services, while single-phase meters can monitor smaller outgoing circuits.
This provides a more detailed view of where electricity is being used throughout the building.
Solar, Battery and EV Systems
Both meter families support forward and reverse energy measurement, making them suitable for applications where energy may flow in both directions.
Applications can include:
Solar PV monitoring
Grid import and export
Battery energy-storage systems
EV charging circuits
Generator and backup power monitoring
The meters provide electrical measurement data, while active system control remains the responsibility of the appropriate controller, inverter or energy-management platform.
Integration with PLC, SCADA and BMS Systems
A key advantage of the ADL200N/ADL200M and ADL400N/ADL400M is their ability to become part of a broader monitoring architecture.
A typical system may include:
Electrical Circuit → External CT + Energy Meter → RS485 Modbus RTU → PLC / HMI / SCADA / BMS → Local Dashboard or Cloud Platform
The supplied documentation shows this same integration structure for both product families. The three-phase range also supports multiple meters sharing an RS485 network when correctly addressed, wired and terminated.
Once integrated, electrical information can be displayed alongside production data, alarms, equipment status, temperature, pressure or flow measurements.
Supporting Energy-Efficiency Projects
Reliable energy data is particularly useful when evaluating efficiency improvements.
Meters can establish baseline consumption before upgrades such as:
Pump replacements
Variable-speed drives
High-efficiency motors
Lighting upgrades
HVAC optimisation
Compressor improvements
Process-control changes
Monitoring the same circuit before and after an upgrade provides more meaningful information than relying only on total site electricity bills.
Why Choose APS Technology Australia?
APS Technology Australia provides both single- and three-phase RS485 energy monitoring options for commercial and industrial applications.
Key capabilities across the ADL200N/ADL200M and ADL400N/ADL400M ranges include:
Circuit-level energy monitoring
RS485 Modbus RTU communication
Forward and reverse energy measurement
External CT options
DIN-rail installation
PLC, SCADA and BMS integration
Selected RCM-compatible models
This allows organisations to monitor electrical consumption at the equipment, circuit, feeder or distribution-board level depending on their operational requirements.
Conclusion
Effective energy management starts with understanding where electricity is being consumed.
The APS Technology ADL200N/ADL200M Single-Phase RS485 Energy Meter and ADL400N/ADL400M Three-Phase RS485 Energy Meter provide a practical way to monitor electrical performance across a wide range of commercial and industrial applications.
From lighting and small pumps to production machinery, HVAC systems, distribution boards, solar installations and EV charging infrastructure, combining single- and three-phase monitoring can provide greater energy visibility and support better operational decisions.
With RS485 Modbus RTU integration, these measurements can also become part of wider automation, SCADA, BMS and energy-management systems.
Contact APS Technology Australia to discuss the right energy monitoring solution for your facility.
Website: aps-technology.com.au
Email: info@aps-technology.com.au
Phone: +61 0481 912 826
