INSTALLATION AND WIRING
24
<Wiring method>
1) Wiring of one RS-485 computer and one inverter
Computer Side Terminals
Signal
name
Description
RDA
RDB
SDA
SDB
RSA
RSB
CSA
CSB
SG
FG
Receive data
Receive data
Send data
Send data
Request to send
Request to send
Able to send
Able to send
Signal ground
Frame ground
PU
connector
SDA
SDB
RDA
RDB
SG
Note 1
0.3mm or more
2
Cable connection and signal direction
10BASE-T Cable
Inverter
2) Wiring of one RS-485 computer and "n" inverters (several inverters)
Note
1
Computer
RDA
RDB
SDA
SDB
RSA
RSB
CSA
CSB
SG
FG
Station 1
SG
RDB
RDA
SD
B
SD
A
Station 2
SG
RDB
RDA
SD
B
SD
A
Station n
SG
RDB
RDA
SD
B
SD
A
Inverter
Inverter
Inverter
Termination
resistor
(Note 2)
Cable connection and signal direction
10 BASE-T Cable
Note: 1. Make connections in accordance with the instruction manual of the computer used.
Fully check the terminal numbers of the computer as they differ between models.
2. There may be the influence of reflection depending on the transmission speed and/or
transmission distance. If this reflection hinders communication, provide a terminal
resistor. If the PU connector is used to make a connection, use a distributor as a
terminal resistor cannot be fitted. Connect the terminal resistor only to the inverter
remotest from the computer. (Terminal resistor: 100
Ω
)
2
Содержание FR-F500 Series
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