Chint | SmartgridOne Documentation

DevicesEnergy meter

Chint Energy Meters

Supported Devices

Device Type	Variants	Modbus TCP (Ethernet)	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
DTSU666-20		❌

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.

Chargee

Cloud Meter Data

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
Terminal 24	RS485 A	RS485_POS	RS485 A	TX+
Terminal 25	RS485 B	RS485_NEG	RS485 B	TX-
N/A	RS GND	GND	Not available	G

Supported Devices

Connection

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RS485 Wiring

NOTE: RS485 Device Addresses