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Open Source Community Endorses the JSY-MK-141G: A Six-Channel CT-Based Metering Module Ushering in a New Era of Smart Power Monitoring

JSY-MK-141G
  • In the midst of global digitalisation and the push for intelligent energy management, precise power consumption monitoring has become a cornerstone of industrial energy saving, smart building operation, and IoT system deployment. The JSY-MK-141G – a six-channel, current-transformer-based AC metering module – has recently caught the attention of developers on GitHub. The repository JSY-MK-141G-Modbus published by user “cizekmilan” offers a clean and practical Python toolchain that bridges hardware and software. It equips developers, engineers, and makers worldwide with a cost-effective, highly integrated power monitoring “workhorse”.

One Module, Many Functions: Six-Channel Design Breaks Traditional Metering Limits

  • The JSY-MK-141G is a high-precision AC energy metering module for single-phase systems. Its standout feature is the 6-channel CT-based design, allowing independent measurement of voltage (1-300 V), current (50mA-50A, 50mA-80A, 50 mA-100 A optional), active power, power factor, frequency, and cumulative energy on each channel. Users can either treat it as six separate single-phase monitoring points or combine two channels to form a complete three-phase meter. This flexibility dramatically expands its applicability in complex power distribution scenarios.
Value

Data Highway: Standard Modbus-RTU for Seamless Connectivity

  • In industrial automation and IoT, the Modbus-RTU protocol is the de facto standard for reliable, open data exchange. The JSY-MK-141G comes with an RS-485 port and full support for the Modbus-RTU specification. It can be easily integrated into industrial control systems, PLCs, SCADA, and building automation networks, providing real-time, accurate data for energy audits, equipment monitoring, and factory energy management systems.
Modbus-RTU
Modbus-RTU

Core Strength: High-Accuracy Sampling and Rugged Hardware

Beyond the advanced multi-channel architecture, the JSY-MK-141G excels in hardware quality:

  1. Measurement accuracy: A dedicated high-precision metering IC with 24-bit AD sampling ensures voltage, current, and power accuracy of ±1.0 %.
  2. Wide load range: Voltage from 1 to 300 V AC, current from 50 mA to 100 A – suitable for everything from sensitive electronics to heavy industrial machinery.
  3. Circuit protection: The RS-485 interface includes ESD protection, and the power supply, voltage inputs, and current inputs are isolated with a withstand voltage of DC 2000 V, ensuring long-term stability in electrically noisy environments.
  4. Wide temperature operation: Powered by DC 9-24 V, the module operates from –20 °C to +60 °C (storage down to –40 °C to +85 °C), making it durable for harsh conditions.

Open-Source Momentum: A “Developer’s Swiss Army Knife” for Project Realisation

  • Great hardware is only half the story; easy-to-use software tools accelerate deployment. On GitHub, the JSY-MK-141G-Modbus project by cizekmilan provides a complete Python command-line tool and Modbus library for the JSY-MK-141G.

Key features of the open-source toolchain:

  • Ready-to-use CLI: Read device system info with python3 jsy_mk_cli.py sys, read a single channel with python3 jsy_mk_cli.py ch --ch 1, or retrieve all six channels at once with python3 jsy_mk_cli.py all.
  • Smart configuration & debugging: The scan command automatically discovers devices on the Modbus bus; you can change the Modbus address and serial baud rate on the fly, simplifying initial setup and troubleshooting.
  • Flexible integration: Built on mature libraries like pyserial and pymodbus – use it as a standalone CLI tool or import it as a Python module into your own automation scripts, data logging systems, or custom HMI panels.
  • Cross-platform: Run it on a Raspberry Pi (Linux) or Windows via a USB-to-RS-485 adapter – ideal for smart-home projects, lab data acquisition, or small-scale industrial monitoring.
  • Rich ecosystem: The repository also includes Bash demo scripts using mbpoll, giving Linux-friendly engineers an alternative way to quickly test the module.
  • This open-source effort dramatically lowers the entry barrier for non-specialists who want to use professional power metering hardware. It makes university teaching, maker projects, and digital energy retrofitting for SMEs far more accessible.

Looking Ahead: The Core Engine for Energy Saving and Digital Transformation

  • As carbon-reduction targets drive companies to manage energy more precisely, the JSY-MK-141G – with its six-channel accuracy, standard industrial interface, and a growing open-source software ecosystem – is finding wide application in:
  • Equipment energy efficiency audits – Identify energy-hungry processes and plan effective retrofits.
  • Smart buildings & data centres – Sub-meter server racks, lighting, and HVAC circuits, and set up alarms.
  • EV charging & distributed energy – Precisely meter EV charging power and energy from solar PV or battery storage.
  • Research & prototyping – Provide engineering and automation students with real-world, quantifiable power data.
  • The JSY-MK-141G is more than just a power metering module – it represents an open, integrated, and intelligent approach to modern energy monitoring. Driven by open-source collaboration and standardised communication protocols, we believe this “Made in China” energy measurement product will help engineers and businesses worldwide build a more transparent, efficient, and sustainable energy future.

About JSY-MK-141G

  • The JSY-MK-141G is a high-value, six-channel AC energy metering module designed for industrial and IoT applications. It features DIN-rail mounting, RS-485, and Modbus-RTU communication. Typical uses include energy retrofitting, power monitoring, telecom base stations, railway transport, petrochemical plants, and smart homes. For more technical details and the open-source toolchain, visit the GitHub project page:
  • https://github.com/cizekmilan/JSY-MK-141G-Modbus
  • For official datasheets and technical support, please refer to the manufacturer’s website.

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Post time: May-29-2026