Huawei SUN2000-3KTL-10KTL-M0 Quick Manual page 13

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When the RS485 communications cables of devices such as the Smart Power Sensor and the
energy storage device are both connected to the inverter, 485A2 (pin 7), 485B2 (pin 9), and PE
(pin 5) are shared.
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When the enable signal cable of the energy storage device and the signal cable of the rapid
shutdown switch are both connected to the inverter, GND (pin 13) is shared.
Smart Dongle Networking Scenario
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In the Smart Dongle networking scenario, the SmartLogger1000A cannot be connected.
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The Smart Power Sensor is necessary for export limitation. Only the DTSU666-H Smart Power
Sensor (provided by Huawei) can be used.
SmartLogger1000A Networking Scenario
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In the SmartLogger1000A networking scenario, the Smart Dongle cannot be connected.
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A maximum of 80 devices can connect to a single SmartLogger1000A, such as inverters, Smart
Power sensor, and EMI. You are advised to connect fewer than 30 devices to each RS485 route.
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The Smart Power Sensor is necessary for export limitation. Select the Smart Power Sensor
according to the actual project.
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To ensure the system response speed, the Smart Power Sensor is recommended to be
connected to a COM port separately from inverter COM port.
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