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HOWTO: Carlo Gavazzi EM21 quick install guide

Last Updated: Aug 23, 2012 06:41PM CEST
To follow this guide you will need:
  • 1 x DEXGate
  • 1 x EM21
  • 1 x USB-RS485 addapter
  • 1 x Computer
  • 1 x Ethernet Cable
  1. Install the current transformers following the following diagram:
  2. Connect the orange usb cable to the 15 connector, the yellow cable to the 14 connector and the black cable to the 13 connector:
    Circutor cvm mini rs485
  3. Power up the meter
  4. Access to set up menu and configure ModBus address
  5. Configure current transformers factor
  6. Reset meter values
  7. Power up the DEXGate
  8. Connect the USB-RS485 cable to the DEXGate
  9. Connect the Ethernet cable to your computer and the ETH1 port of the DEXGate
  10. Access the web administration interface of the DEXGate (
  11. Login (the default username and password are admin/admin)
  12. Go to the "Bridge Configuration" section
  13. Edit the line:
    to look like this:
  14. where "10" indicates ModBus meter adress
  15. Save
  16. Restart the modbus bridge or the DEXGate
  17. You're done!

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