Mitsubishi Electric FR-A820-00046 Instruction Manual page 781

Parameters
NOTES Pins No. 2 and 8 provide power to the operation panel or parameter unit. Do not use these pins
during RS-485 communication.
Do not connect the PU connector to the computer's LAN board, FAX modem socket or telephone
modular connector. The product could be damaged due to differences in electrical specifications.
Wiring and configuration of PU connector communication system
System configuration
FR-DU08
RJ-45 connector
Fig. 5-300:
● Wiring of computer by RS-485
Signal name
RDA
RDB
SDA
SDB
RSA
RSB
CSA
CSB
Fig. 5-301:
*
Make connection in accordance with the Instruction Manual of the computer to be used with. Fully
check the terminal numbers of the computer since they vary with the model.
FR-A800
Inverter
PU
Operation
panel connector
connector
FR-ADP
(option)
RJ-45 connector
Communication cable
Connecting to the PU connector
Computer Side Terminals
Description
Receive data
Receive data
Send data
Send data
Request to send
Request to send
Clear to send
Clear to send
Signal ground
SG
Frame ground
FG
Connection to an inverter
(N) Operation via communication and its settings
Station 0
Computer
Inverter
PU
RS-485
connector
interface/
terminals
RJ-45
connector
Communication cable
Cable connection and signal direction
Communication cable
∗
Station 0
Computer
Inverter
RS-232C
connector
PU
RS-232C connector
Maximum
cable
15 m
RS-232C-RS-485
converter
Communication cable
Inverter
PU connector
SDA
SDB
RDA
RDB
0.2 mm² or more
SG
RJ-45
connector
I002727E
I002764E
5 - 601