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Three-phase Intelligent Power Meters, User-friendly, Power-off Protection

The DS9L and DS7L series are three-phase intelligent power meters developed by TOKY Instruments. Featuring plug-in terminals and True RMS measurement, they monitor 28 electrical parameters (e.g., voltage, current, power, frequency) in three-phase networks. With support for digital I/O and RS485 communication (Modbus RTU protocol), they are ideal for industrial power system monitoring and energy management.
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  • DS7L&DS9L

  1. Easy Installation: Plug-in terminals for efficient wiring and maintenance.

  2. Comprehensive Measurement: Covers 28 parameters including voltage, current, active/reactive power, frequency, and power factor.

  3. Flexible I/O: 2 digital inputs + 2 outputs (expandable to 4); DS7L supports 2 inputs as standard.

  4. Communication: Optional RS485 with Modbus RTU protocol for system integration.

  5. Data Protection: Active/reactive energy data with power-off protection.

  1. Measurement Type: True RMS

  2. Communication Protocol: Modbus RTU

  3. Power Supply: Standard three-phase networks

  1. Industrial Power Monitoring: Factory distribution systems, machine tool energy consumption.

  2. Energy Management: Commercial buildings, data center power data collection.

  3. Smart Grids: Substations, renewable energy grid connection monitoring.

  4. Equipment Integration: Interoperability with PLCs and SCADA systems.

Frequent Questions
  • 1. What key parameters can the DS7L/DS9L meters measure?​
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    They measure 28 parameters, including three-phase voltage, current, active/reactive power, frequency, and power factor, covering core power system metrics.
  • 2. How is the communication compatibility of the meters?​
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    With optional RS485 interface and Modbus RTU protocol, they seamlessly integrate into industrial automation system.
  • 3. What is the main difference between DS7L and DS9L?
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    DS9L has a 96×96mm panel, while DS7L is 72×72mm; DS7L standard supports 2 digital inputs, whereas DS9L offers expandable options.
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