CIRCUTOR CDP-0 - Manual (Page 12)

CDP
12 Instruction Manual
Figure 4: Communications channels.
The removable connector terminals are described as follows:
Table 5: Description of the R2 channel terminals.
Description of the R2 communications channel connector
Terminals
Description of terminal
RS-422 RS-485 RS-232
1 TxD + A+ CTS
2 RxD – NC
(1)
RTS
3 TxD - B- RX
4 RxD + NC (1) TX
5 GND GND GND
(1)
NC: Not connected.
Table 6: Description of the R3 channel terminals.
Description of the R3 communications channel connector
Terminals
Description
of terminal
Communication
s channel
5 GND
RS-485 6 B-
7 A+
The R2 channel is used for communications with the inverter and the R3 to
create a network with the auxiliary units that help measure the power in three-
phase installations.
Note: For the proper working of RS-485 communications, always connect the
GND terminal.