Communication Module Connections; Rs-485 Connection - Delta RPI-M8 User Manual

5.4 Communication Module Connections

The Communication Module supports the functions of communication with a
computer. There are two types of modules. One has RJ45-type RS-485
connector, and the other has terminals-type RS-485 connector.
Dry contact
(3A / 28V)
EPO
(Emergency Power off)
RJ45-type

5.4.1 RS-485 Connection

The pin definition of RS-485 is shown as in table 5-6. Installers should switch ON
the terminal resistor when single inverter is installed. The wiring of multi-inverter
connection is shown as figure 5-8. Installers should switch ON terminal resister
at the first and last devices of the RS485 chain as shown in Figure 5-8. The other
terminal resisters should be switched OFF. Please refer to table 5-8 for the
terminal resister setting.
Pin Function
4 DATA-
5 DATA+
7 VCC (+12V)
8 GND
RJ45-type
Terminal Resistor
RS-485
(Emergency Power off)
Figure 5-7 Communication module
Table 5-6 Definition of RS 485 pin
Pin Function
1 VCC (+12V)
2 GND
3 DATA+
4 DATA-
5 DATA+
6 DATA-
GND
VCC
EPO
Terminals-type
1 2 3 4 5 6
Terminals-type
RS-485
-
+ - +
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