Enabling ESG-driven Smart Energy Management
As ESG and sustainability initiatives become increasingly important, enterprises, industrial facilities and public infrastructure require greater visibility into energy consumption and operational efficiency. Accurate power monitoring provides the essential data foundation for smarter energy management, helping organizations optimize energy use and support measurable sustainability goals. In response to the trend and customer needs, PLANET announces a series of Smart Power Meter for smarter energy management and long-term ESG initiatives.
High-density Multi-circuit Power Monitoring
The PLANET SPM-D05/D10 Series is a line of DIN-rail multi-circuit power meters designed for centralized monitoring of multiple electrical circuits. The series consists of four models: the 5-circuit SPM-D05 and SPM-D05E, and the 10-circuit SPM-D10 and SPM-D10E. By integrating electrical measurement, power-quality analysis, data logging and Modbus communication into a compact unit, the series helps reduce installation space, wiring complexity and deployment costs in energy management applications.
Flexible 5-circuit and 10-circuit Configurations
The SPM-D05 and SPM-D05E provide a 5-circuit configuration suitable for smaller distribution panels and applications with fewer monitored loads. The SPM-D10 and SPM-D10E provide a 10-circuit configuration with two independent main circuits and up to 24 single-phase branch circuits or 8 three-phase branch circuits. Their upper and lower current input groups are electrically isolated, allowing two independent power systems to be monitored by a single meter.
| Product Type | Circuit Type | Model | Current Sensor Input | Power Supply | Primary Communication | Secondary Communication Option |
| DIN-rail Power Meter |
5-circuit | SPM-D05 | RC/mV 0~333 mV |
AC 85~264 V / DC 100~300 V |
RS-485 Modbus RTU |
N/A |
| SPM-D05E | Ethernet Modbus TCP | |||||
| 10-circuit | SPM-D10 | N/A | ||||
| SPM-D10E | Ethernet Modbus TCP |
Flexible Wiring for Various Power Systems
Each group of three current inputs can be configured for 1P2W, 1P3W, 3P3W or 3P4W systems according to the connected load. When a branch circuit is configured for single-phase measurement, each current input can be assigned to the corresponding voltage phase. This flexible configuration supports mixed single-phase and three-phase loads and simplifies load-balancing arrangements in different power distribution environments.
High-accuracy True RMS Measurement
With True RMS measurement and a sampling rate of 256 points per cycle, the SPM-D05/D10 Series delivers reliable measurements across a wide range of electrical loads. It provides 0.2% voltage and current accuracy and Class 0.5S active and reactive energy accuracy, making it suitable for energy monitoring, electricity cost allocation and power-quality management.
RS-485 and Ethernet Connectivity
All models are equipped with an RS-485 interface supporting Modbus RTU. The SPM-D05E and SPM-D10E additionally provide an Ethernet interface supporting Modbus TCP for integration into IP-based monitoring networks. The SPM-D05 and SPM-D10 are designed for standard RS-485 deployments without Ethernet connectivity.
Comprehensive Energy and Power-quality Measurement
The SPM-D05/D10 Series provides comprehensive measurement of voltage, current, frequency, active power, reactive power, apparent power, power factor, and active, reactive and apparent energy. It also supports voltage and current total harmonic distortion (THD), 2nd- to 31st-order harmonic measurement, three-phase unbalance, demand calculation, and maximum and minimum value recording, enabling detailed analysis of energy consumption and power quality.
Built-in Data Logging and Time-of-use Management
The SPM-D05/D10 Series incorporates 2MB Flash memory for local data logging without battery-life limitations. It can record selected measurement parameters at configurable intervals for historical energy analysis. Time-of-Use (TOU) functionality supports up to 4 time zones, 8 time periods and 4 tariff rates, enabling electricity consumption and demand to be tracked according to different billing periods.
Integrated I/O for Alarm and Control
The SPM-D05/D10 Series is equipped with 2 digital inputs, 4 relay outputs and 1 pulse output. The relay outputs can be configured for alarm or digital output operation, enabling the meter to respond to specified electrical conditions and work with external alarm, monitoring and control equipment.
Compact Design for Industrial Environments
Featuring a compact enclosure and standard 35mm DIN-rail mounting, the SPM-D05/D10 Series can be easily installed in electrical distribution panels. When paired with split-core current transformers, it is well suited for retrofit projects where installation space and system downtime are limited. Its built-in 128 × 64 dot-matrix LCD provides an intuitive interface for on-site measurement viewing and parameter configuration.
Modbus-based Building Energy Management
The multi-circuit power meter can be connected to a Modbus gateway through RS-485 Modbus RTU, allowing its electrical data to be converted into Modbus TCP for transmission over an Ethernet network. An EMS or BMS can centrally monitor voltage, current, power, energy consumption and power quality across multiple circuits. This architecture is suitable for commercial buildings, rental facilities and distribution panels requiring centralized energy analysis, electricity cost allocation and load management.
Remote Power Monitoring for Distributed Industrial Sites
For factories and geographically distributed facilities, the multi-circuit power meter can be connected to a serial device server to extend RS-485 communication across an IP network. Measurement data from remote electrical panels can be delivered to a central control room or IIoT platform for real-time equipment load monitoring, historical analysis and abnormal power-condition detection. This solution enables existing serial power meters to be remotely accessed without replacing field equipment, simplifying industrial energy monitoring across multiple locations.
DIN-rail 5-/10-circuit Modbus Smart Power Meter
