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HOWTO: Circutor LM4i4o quick install guide

Last Updated: Aug 23, 2012 06:41PM CEST
To follow this guide you will need:
  • 1 x DEXGate
  • 1 x LM4I/4O
  • 1 x USB-RS485 addapter
  • 1 x Computer
  • 1 x Ethernet Cable
  1. Install the pulse inputs and power supply following the following diagram:
  2. Connect the orange usb cable to the A(+) connector, the yellow cable to the B(-) connector and the black cable to the GND connector
  3. Power up the DEXGate
  4. Connect the USB-RS485 cable to the DEXGate
  5. Connect the Ethernet cable to your computer and the ETH1 port of the DEXGate
  6. Access the web administration interface of the DEXGate (
  7. Login (the default username and password are admin/admin)
  8. Go to the "Bridge Configuration" section
  9. Edit the line:
Select a option (A or B) and complete the line:

- A. Same meter for all imputs 
Example: You have a deployment with up to 4 gas meters (same parameter and scalling factor
  1. Complete line as follows:
  2. devices.circutor-lm-4i-4o=98[419(0.001)]
  3. where "98" indicates ModBus LM4i4o address
  4. "419" is Gas Volume ID parameter (available parameters)
  5. "0.001" is scalling factor for pulse readingds (In the example, 1 pulse = 1L = 0.001m3)

- B. Diferent meters
Example: 1st pulse input is a gas meter (m3), 2nd is a water meter (m3), 3rd input is not being used and 4th is metering electricity 
  1. Complete line as follows:
  2. devices.circutor-lm-4i-4o=98[419(0.001);901(0.001);0;402]
  3. where: "98" indicates ModBus LM4i4o address
  4. 1st input = 419 (Gas Volume ID). 0.001 Scalling factor (1 pulse = 1L = 0.001m3) (available parameters)
  5. 2nd input = 901 (Water Volume ID). 0.001m3 Scalling factor (1 pulse = 1L = 0.001m3)
  6. 3rd input: 0: Disabled
  7. 4th input: 402 (Active Energy ID). 1 Scalling factor (1 pulse = 1kWh)
Then Save and Restart the modbus bridge or the DEXGate. You're done!

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