Supported Devices
| Device Type | Variants | Modbus TCP (Ethernet) | RS485 | Curtailment |
|---|---|---|---|---|
| Three phase hybrid inverter | SUNSYNK-12K-SG04LP3, SUNSYNK-50K-SG01HP3-EU-BM4 | ✅ | ✅ | ✅ |
Wiring
RS485
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 / Modbus-485_B | RS485 A | RS485_POS | RS485 A | TX+ |
| Pin 2 / Modbus-485_A | RS485 B | RS485_NEG | RS485 B | TX- |
| Pin 3 / GND_485 | RS GND | GND | Not available | G |
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.
Go to “Main Screen” >> “System Settings” >> “Advanced Function.”
- Modbus SN should be set to any number between 1 and 247. Do not select 0!! Note that if there are multiple devices on the RS485 bus, each should be given a unique number. This is the address.
- Slave should be checked.
- Only when an additional meter is connected directly to the inverter should “EX_meter For CT” be checked. If there is only a meter in parallel with the a-TroniX Controller it should be unchecked.
- Make sure the following settings are all correct: "Max A Charge", "Max A Discharge", "Grid Charge Ampere"
Last updated May 4, 2026Edit this page