Wiring Method - Mitsubishi Electric FR-V500 Instruction Manual

<Wiring method>
1) Wiring of one RS-485 computer and one inverter
Computer Side Terminals
Signal name
RDA
RDB
SDA
SDB
RSA
RSB
CSA
CSB
SG
FG
2) Wiring of one RS-485 computer and "n" (multiple) inverters
Computer
RDA
RDB
SDA
SDB
RSA
RSB
CSA
CSB
SG
FG
CAUTION
1. Make connections in accordance with the manual of the computer used.
Fully check the terminal numbers of the computer since they vary with the model.
2. There may be the influence of reflection depending on the transmission speed and/or transmission
distance. If this reflection hinders communication, provide a terminating resistor. If the PU connector
is used to make a connection, use a distributor since a terminating resistor cannot be fitted.
Connect the terminating resistor to only the inverter remotest from the computer.
(terminating resistor: 100Ω)
Cable connection and signal direction
Description
Receive data
Receive data
Send data
Send data
Request to send
Request to send
Clear to send
Clear to send
Signal ground
Frame ground
Cable connection and signal direction
10 BASE-T cable
(Caution 1)
SG
Station 1
Inverter
10 BASE-T cable
(Caution 1)
2
0.2mm or more
SG
Station 2
Inverter
25
Others
Inverter
PU connector
SDA
SDB
RDA
RDB
SG
Terminating
resistor
(Caution 2)
SG
Station n
Inverter
1