Energy Management System for Industrial Power Distribution
An energy management system is the layer of a plant's electrical infrastructure that turns measured values into decisions: which feeders carry the load, where energy is lost, when demand peaks, and which equipment needs attention. In the proposed architecture, the system is assembled from documented components (integration scope confirmed per project): panel meters and the LOGGON-5M comprehensive power measurement instrument for data acquisition, signal transducers for interfacing with existing control equipment, and the LOGGON-K1 smart energy cloud platform for collection, analysis and device lifecycle management. This page describes the category, the models available in this range, and the engineering criteria for specifying an industrial energy management system for a factory or substation.
Overview of the Category and Where It Is Used
A factory energy management system sits between the instrumentation on the switchgear and the people responsible for energy cost, power quality and maintenance. Measurement devices are installed on incoming feeders, distribution panels and major loads; they convert voltage and current into power, energy and power-quality data; communication links carry that data to a platform where it is stored, analysed and presented. The result is a metering chain in which every kWh and kvarh can be traced to a circuit, a shift or a production area.
Typical installation points include:
- Main incoming feeders and transformer secondaries, where total consumption, demand and power factor are recorded.
- Sub-distribution boards feeding production lines, HVAC, compressed air and lighting, where consumption is allocated to cost centres.
- Individual large loads such as motors, furnaces and chillers, where operational data supports fault diagnosis and maintenance planning.
- Substations and generator rooms, where power dispatch and equipment status are monitored continuously.
The measurement layer is built from MDM3100 and MDM3001S panel meters, which measure U, I, P, Q, S, PF, F and kWh and communicate over RS-485 (Modbus documented for the MDM3001S); kvarh registration is documented for the MDM3001S, while the MDM3100 documents energy pulse outputs; the MDM3001S and DNS 9000 support multi-tariff energy accounting, which allows consumption to be split across time-of-use periods for cost analysis. For circuits where documented accuracy classes or analogue signalling are specified, the LOGGON-5M comprehensive power measurement instrument (voltage/current class 0.2, active energy class 0.5) and PRO M31 transducers provide their documented analogue outputs. The LOGGON-K1 smart energy cloud platform provides 7x24 automated data collection and analysis of electrical equipment using mobile internet, AI, automation and IoT technologies, covering real-time monitoring, fault diagnosis and prediction, and integrated management of power dispatch, monitoring, equipment management and O&M, including device full-lifecycle management from warehousing to retirement on one unified device-management platform.
Models in This Range
MDM3100 / MDM3001S panel meters
Panel-mounted meters for switchgear and distribution boards. Both measure U, I, P, Q, S, PF, F and kWh; kvarh registration is documented for the MDM3001S, while the MDM3100 documents energy pulse outputs. The MDM3100 provides RS-485 communication and the MDM3001S provides RS-485 with Modbus. The MDM3001S adds multi-tariff energy registration, as does the DNS 9000. These meters form the base acquisition layer for a factory energy management system where many circuits must be metered at moderate cost per point.
LOGGON-5M comprehensive power measurement instrument
A comprehensive instrument for feeders and loads where power quality and energy data matter. Input voltage range is 0–690 V and current input is 0–5 A. Accuracy class is 0.2 for current and voltage, 0.5 for power, 0.5 for active energy and 1.0 for reactive energy. Analogue output is 4–20 mA or 0–5 V, and communication is RS485 Modbus-RTU. Optional modules include digital input, harmonic analysis, analogue output, relay output, Ethernet and Profibus, so a single instrument can be configured for metering, alarm signalling and harmonics monitoring.
PRO M31 transducer
A signal transducer for interfacing measured values with PLCs, controllers or legacy monitoring systems. It provides three programmable analogue outputs and RS-232 communication, useful where an existing control system must receive analogue signals rather than Modbus data.
LOGGON-K1 smart energy cloud platform
The software layer of the energy management system. The manufacturer positions LOGGON-K1 as a platform for 7x24 automated data collection and analysis of electrical equipment using mobile internet, AI, automation and IoT technologies, supporting real-time monitoring, fault diagnosis and prediction, and integrated management of power dispatch, monitoring, equipment management and O&M. Device full-lifecycle management is handled on one unified device-management platform, from warehousing to retirement.
How to Select
- Accuracy requirement: for loss-analysis points, the LOGGON-5M documents class 0.5 active energy; for general sub-metering, confirm the accuracy of the selected MDM3100/MDM3001S model against the project's requirements (neither model's supplied summary states an accuracy class).
- Tariff structure: where time-of-use tariffs apply, choose MDM3001S or DNS 9000 for multi-tariff registration.
- Signal interface: use PRO M31 where analogue outputs are required by existing controllers; use Modbus devices (protocol variant per the model documentation) where a digital bus is available.
- Power quality: add the harmonic analysis option to the LOGGON-5M on feeders supplying variable-speed drives, rectifiers or other non-linear loads.
- Voltage level: confirm the 0–690 V input range of the LOGGON-5M suits the circuit; for higher voltages, use voltage transformers and verify the overall accuracy chain.
- Platform scope: define whether the project covers metering only or full device lifecycle management; the latter requires LOGGON-K1.
Integration and Communication
The system uses RS-485 as the primary fieldbus, with RS485 Modbus-RTU documented on the LOGGON-5M and RS485 Modbus documented on the MDM3001S and DNS 9000, and optional Ethernet or Profibus modules for plant-network integration. Those Modbus-documented meters and the LOGGON-5M can share a Modbus segment where each model's protocol variant and communication settings are confirmed compatible; the MDM3100's documented interface is RS-485. Address allocation, baud rate and termination should follow the meter documentation. Analogue 4–20 mA or 0–5 V outputs from the LOGGON-5M and the three programmable outputs of the PRO M31 allow connection to PLC analogue cards or older SCADA systems. Before commissioning, verify CT ratios and polarity, confirm that summed energy values reconcile with the utility meter at the incoming feeder, and check that time synchronisation between devices and the LOGGON-K1 platform is consistent so that multi-tariff registers align.
FAQ
What is the difference between MDM3001S and MDM3100?
Both measure U, I, P, Q, S, PF, F and kWh over RS-485; Modbus is documented for the MDM3001S. kvarh registration is documented for the MDM3001S, while the MDM3100 documents energy pulse outputs (register detail per its datasheet). The MDM3001S supports multi-tariff energy registration.
Can the LOGGON-5M measure harmonics?
Yes, harmonic analysis is available as an optional module on the LOGGON-5M. It is not included in the base configuration.
How does the platform receive data from the meters?
Field devices communicate over RS-485 (Modbus where documented for the model); the LOGGON-K1 platform performs 7x24 automated data collection and analysis using mobile internet and IoT technologies. Network architecture and gateway requirements should be agreed at project specification stage.
Is the system suitable for a factory with multiple buildings?
Yes. Distribution boards in each building can be metered with MDM3100/MDM3001S units on RS-485 segments, with LOGGON-5M instruments on main feeders, all reporting to the LOGGON-K1 platform for consolidated monitoring (proposed architecture; the integration scope is confirmed per project).
For specification support, provide the single-line diagram, the list of metering points, required accuracy class, tariff structure and the communication protocol used by the plant control system. LOGGON TECH can then confirm the meter, transducer and platform combination that matches the project.