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RS485 Communication for 30-40KTL-M3 inverters

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Andrii Sokolan
  • Updated

Introduction

RS485 Communication can be used to connect several inverters to the monitoring system. In any case, you will need a communication device.

Prerequisites

Cable description

Type

Recommended Specifications

Source

(Optional)

Signal cable

Two-core outdoor shielded twisted pair

(recommended model: DJYP2VP2-2x2x0.75)

Prepared by users

 

Connecting the Signal Cable

The COM port of the inverter is used to connect the signal cable.

mceclip2.png

Accordingly, pins 1 and 3 and 2, and 4 are responsible for the cascade connection of inverters when using RS485 communication.

mceclip3.png

mceclip4.png

 

Scenario using Smart Dongle

The Smart Dongle is connected to the Master Inverter in this scenario using the dedicated USB port.

 

1.jpg
NOTE

  • The number of inverters that can be connected for communication is limited by the characteristics of the Smart Dongle (datasheets available at the link).

  • If a SUN2000 is networked using a Smart Dongle, it cannot be connected to the SmartLogger.

Step 1: After making the connection, you must commission the inverter according to the manual.
After quick settings through the FusionSolar app in step Device Management, press the button mceclip9.png+ (cascading inverters).

mceclip10.png

Step 2: Press the button Searching for cascaded inverters and wait for the master inverter to search for all cascaded inverters.

mceclip11.pngmceclip13.png

Step 3: Check the serial numbers and the number of inverters that were found. Then you can proceed to the next steps of quick settings.

mceclip12.png

NOTE

When you are locally connected to a master inverter, you will not be able to view the operation parameters of other inverters. (in this scenario with SmartDongle).

 

Scenario using SmartLogger

2.jpg
NOTE

  • The maximum number of inverters that can be connected for communication is limited by the characteristics of the SmartLogger (datasheets available at the link).

  • If a SUN2000 is networked using the SmartLogger, it cannot be connected to a Smart Dongle.

  • The number of SUN2000s connected to each RS485 route is recommended to be less than 30.

Next steps

Please see this guide, "Setting RS-485 communication for Smart Logger and Inverters" to add inverters.

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