Mitsubishi Electric FR-A820-00046 Instruction Manual page 826

(N) Operation via communication and its settings
System configuration of RS-485 terminals
● Computer and inverter connection (1:1)
Fig. 5-308:
● Combination of computer and multiple inverters (1:n)
RS-485
interface
terminals
RS-232C
cable
Fig. 5-309:
How to wire RS-485 terminals
● 1 inverter and 1 computer with RS-485 terminals
Fig. 5-310:
5 - 624
Computer
RS-485
interface/
terminals
Twisted pair cable
Connection of a computer to one inverter
Station 0
Computer
Inverter
RS-485
terminals
∗
Twisted pair cable
Station 0
Computer
RS-232C Inverter
converter
RS-485
Maximum terminals
15 m
∗
Converter
Twisted pair cable
Connection of a computer to several inverters
Computer
RDA
RDB
SDA
SDB
RSA
RSB
CSA
CSB
SG
FG
Connection to one inverter
Inverter
RS-485
terminals
RS-232C
∗
cable
*Set the terminating resistor switch to the "100 " position.
Station n
Station 1
Inverter
Inverter
RS-485
RS-485
terminals
terminals
∗ ∗
Station 1
Station n
Inverter
Inverter
RS-485
RS-485
terminals
terminals
∗
∗1
SG
Computer
Inverter
RS-485
terminals
Maximum
15 m
Converter
Twisted pair cable
* Set only the terminating resistor switch of the
remotest inverter to the "100 " position.
∗
*Set only the terminating resistor switch of the
remotest inverter to the "100 " position.
∗2
Parameters
∗
I002728E
I002729E
I002730E