Rev 20220606
RX2505AC
Page
23
of
35
Figure 5-11 – CT polarity
Figure 5-12 RS485 pins
As shown in figure 5-11, an arrow indicates the direction of the CT, pass the cable through the hole of the
CT, then close and lock the CT.
Note
: On the “Grid” CT the orientation of the arrow (L to G) must be pointing from switchboard to grid. The
“PV” CT arrow must point from PV to switchboard.The CTs must be installed in the power distribution box.
5.3
External RS 485 Connection
RX-2505AC has a USB RS 485 port allowing customers to connect their own devices.
1. Unscrew the rubber nut on the water-proof cover of the system (RS485)
；
2. The detail of the USB RS 485 as shown in Figure 5-12
；
Note
: The RX-2505AC has a Wi-Fi module inside. If customers use another Wi-Fi module or other
communication module, they need use the default USB RS 485 port.
5.4
Connection of DRM0 terminal (Australia only)
When RX-2505AC is installed in some states in Australia, the DRM terminal needs to be connected.
The connection method is as follows:
1. Unscrew the rubber nut on the water-proof cover of the RX-2505AC (DRM0);
2. Make the RJ45 terminal with tools according to the identification in figure 5-14;
3. Tighten the aviation plug as shown in figure 5-13;
1
2
3
4
+5V
485_A
485_B
GND
Table 5-5 – RS485 pins details