Pilot Energy Meters
Supported Devices
| Device Type | Modbus TCP (Ethernet) | RS485 |
|---|---|---|
| Pilot SPM33 | ✅ | ✅ |
Wiring
RS485
The RS485 terminals are located on the back of the device.
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 |
|---|---|---|---|---|
| 13 (A+) | RS485 A | RS485_POS | RS485 A | TX+ |
| 12 (B-) | RS485 B | RS485_NEG | RS485 B | TX- |
| 14 (Shield) | RS GND | GND | Not available | G |
Note
Note
Power Supply Ensure the device is powered using terminals 1 (L/+) and 3 (N/-). The auxiliary power supply range is AC 85-265V or DC 100-300V.
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.
Use the following Modbus settings in the Controller's device wizard. These are the default settings for the meter:
- Baudrate: 9600
- Modbus Address: 1 (or the address set on the meter)
- Parity: None
- Stop bits: 1
- Data bits: 8
Last updated December 10, 2025Edit this page