Supported Devices
Note
Note
The UE Series supports both RS485 (Serial) and Modbus TCP (via Ethernet dongle). Ensure you select the correct connection mode in the controller.
Wiring
RS485 (10000 - 20000 UE)
The 10000-20000 UE series uses a specialized circular waterproof connector for RS485 communication. You must disassemble this connector to wire it.
Pin Definition: Inside the circular connector, the pins are numbered 1 and 2.
Info
RS485 Wiring
- For correct RS485 wiring: Follow the guidelines for RS485 wiring.
- If the wiring shown in the table below is incorrect, please let us know.
- There is no general consensus in the industry about the usage of A and B for the RS485 polarity, so it may be counterintuitive and opposite of what you might expect for some devices.
| Device | a-TroniX Controller model OM1 | a-TroniX Controller model IG8 | RS485-USB converter | RS485-Ethernet converter |
|---|---|---|---|---|
| Pin 1 (RS485 A) | RS485 A | RS485_POS | RS485 A | TX+ |
| Pin 2 (RS485 B) | RS485 B | RS485_NEG | RS485 B | TX- |
| N/A | RS GND | GND | Not available | G |
Note: Consult the manual if your model uses a different connector type.
RS485 (4000 - 6000 UE)
For the smaller UE models, the connection is typically via the terminal block or DB9 port. Please verify with the specific manual linked above.
Configuration
Warning
NOTE: RS485 Device Addresses
- You MUST give each device on the RS485 bus a unique address. Check the manual of the device on how to do this.
- Use lower addresses first (1, 2, ...) because the a-TroniX Controller will find them faster!
- For each device, it is generally recommended to stick with the factory default baud rate, parity, and stop bits. The a-TroniX Controller will scan on those first.
To change the Modbus address on the Growatt UE LCD display:
- Double tap the front button/screen to enter the menu.
- Navigate to Settings -> Set COM Address.
- Select Set Manual.
- Single tap to increment the number.
- Double tap to confirm ("Set Addr OK!").
Last updated March 11, 2026Edit this page