11
4.2 Connection to the Inverter
1. Below is the diagram of EzLogger Pro DI ports, where REF1 and REF2 occupy two ports respectively.
EzLogger Pro DI ports are compatible with RCR and DRED functions, and the ports for
different functions are defined as follows:
2. COM1, COM2 and COM3 only communicate with the inverters, and COM4 is only connected
to the environmental monitor and other devices, so avoid wrong correction.
3. A of COM1, COM2, COM3 and COM4 ports corresponds to the differential , B
corresponds to the differential signal -.
Figure 4.1-2 Schematic Diagram of Ezlogger Pro DI Ports
1 2
3 4
DI
REF1
REF2
REF1
1
2
3
4
REF2
RCR
+5V
D_IN1
D_IN2
D_IN3
D_IN4
+5V
DRED RefGen
DRM1/5
DRM2/6
DRM3/7
DRM4/8
Com/DRM0
4.2 Connection to the Inverter
Introduce RS485 communication connection mode between EzLogger Pro and
the inverter.
Introduce how EzLogger Pro is connected to the inverter.
4.2.1 Connection to a single inverter
Figure 4.2.1-1 Schematic Diagram of COM1, COM2 and COM3 Ports of EzLogger Pro
Through RS485, the inverter is connected to EzLogger Pro for communication, and EzLogger Pro
has 3 RS485 ports, namely COM1, COM2 and COM 3.
The diagram of COM1, COM2 and COM3 ports of EzLogger Pro is as follows:
COM1
A B A B
A B
COM2 COM3
