Chint Energy Meters
Supported Devices
| Meter Type | Variants | Modbus TCP | RS485 |
|---|---|---|---|
| DDSU666 | 230V-5/80A 230V-100A/40mA | ✅ | ✅ |
| DTSU666 | 3x230V/400V-5/80A 3x230V/400V-1.5(6)A 3x230V/400V-100A/40mA | ✅ | ✅ |
| DTSU666HW | 3x230V/400V-5/80A 3x230V/400V-1.5(6)A 3x230V/400V-100A/40mA | ✅ | ✅ |
Connection
The communication between the SmartgridOne and the energy meter operates via an RS-485 serial bus or Modbus TCP.
It is recommended to use shielded cables with twisted pairs for optimal performance. For short distances, a twisted pair from a network cable (minimum CAT5e) can be used.
The following guidelines apply:
- Maximum Distance: The total cable length, including the main cable and branches, is limited to 100 meters.
- Connecting Multiple Energy Meters: The cable should be daisy-chained from meter to meter or branched off the main cable (branches must not exceed 1 meter).
- Long Distances: It is recommended to install a 120Ω termination resistor at the end of the main cable and activate the termination resistor on the SmartgridOne Controller.
Example of cable setup:
| Cable Wire | Energy Meter | SmartgridOne Controller | RS485 USB | Solar Gateway |
|---|---|---|---|---|
| White-Brown | Terminal 24 | Terminal RS485 A | Terminal RS485 A | Terminal RS485 A |
| Brown | Terminal 25 | Terminal RS485 B | Terminal RS485 B | Terminal RS485 B |
| Shield | Not Applicable | Terminal RS485 GND | Terminal RS485 GND | Terminal RS485 GND |
