支持的设备

Device Type	Modbus TCP (Ethernet)	RS485
Carlo Gavazzi EM340	❌	✅

线路连接

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
	RS485 A	RS485_POS	RS485 A	TX+
	RS485 B	RS485_NEG	RS485 B	TX-
	RS GND	GND	Not available	G

待办事项：完成线路连接

配置

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.

通过电表的“地址”配置菜单设置 Modbus 地址。