Supported Devices
The IEM 2100 Series are single-phase energy meters.
| Device Type | Modbus TCP (Ethernet) | RS485 |
|---|---|---|
| Schneider-Electric iEM 2100 Series | ❌ | ✅ |
| Schneider-Electric iEM 2150 | ||
| Schneider-Electric iEM 2155 |
Wiring
The IEM 2100 series communicates via Modbus RTU over RS485.
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 | SmartgridOne Controller model OM1 | SmartgridOne Controller model IG8 | RS485-USB converter | RS485-Ethernet converter |
|---|---|---|---|---|
| D1 (+) | RS485 A | RS485_POS | RS485 A | TX+ |
| D0 (-) | RS485 B | RS485_NEG | RS485 B | TX- |
| 0V / Shield | RS GND | GND | Not available | G |
Please refer to the device manual for the exact pin locations, as they may vary slightly between specific sub-models (e.g., iEM2150 vs iEM2155).
Configuration
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 SmartgridOne 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 SmartgridOne Controller will scan on those first.
Communication Settings
Ensure the device settings match the driver capabilities defined below:
- Baud Rate: 9600, 19200, or 38400 (Default is often 19200)
- Parity: Even, Odd, or None
- Stop Bits: 1
- Data Bits: 8
Check the device manual on how to enter the energy meter's configuration menu to set the Modbus Address and Baud Rate.