© 2021 Hoymiles Power Electronics Inc. All rights reserved.
04
Single-phase Microinverter User Manual
D
DTU Communication Indicator (With Microinverter)
E
DTU Alarm Indicator
F
Wi-Fi Antenna (2.4G)
G
RS485
H
DRM Port (For Australia only)
I
Ethernet Port
J
USB Port
K
Reset Bottom
L
Power Port
M
2.4G Antenna
3.2 Export Management Function (RS485 port)
a. Devices Required.
• Hoymiles Microinverter: 4-in-1 Unit, 2-in-1 Unit and Single Unit
• DTU: DTU-Pro:
• Meter: Chint Meter (DDSU666)/Chint Meter (DTSU666)/CCS WattNode Meter
b. Export Control Type.
• Type 1: Zero Export: limits the export power to zero to prevent the generated power fed back to the
grid.
• Type 2: Export Limit: limits the export power within a certain value.
• Type 3: Production and Consumption Monitoring: enable to measure the PV generation with high
accuracy.
c. Installation Diagram.
PV
Module
PV
Module
Hoymiles
MI-600
Hoymiles
MI-600
Solar
Local Load
Phase A
Phase B
Phase C
Neutral
Hoymiles
MI-600
Hoymiles
MI-600
PV
Module
PV
Module
PV
Module
PV
Module
PV
Module
PV
Module
Grid
Note:
Refer to the “Hoymiles Export Management Technical Note” for more details.
3.3 Remote Active Power Control (RS485 port)
In some countries, it might be required that the generating plants should be equipped with a logic interface
(input port) to cease the output of active power or limit active power to a regulated level. This logic input can
be the RS485 port, Ethernet port, and so on. The DTU-Pro provides the RTU Modbus protocol over RS485 port
for this remote active power control. For more information, refer to the “Modbus Implementation Technical
Note”.
