Instruction manual

31
2
INSTALLATION AND WIRING
<Wiring methods>
1) Wiring of one RS-485 computer and one inverter
2) Wiring of one RS-485 computer and "n" inverters (several inverters)
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 termination resistor. If the PU connector is used
to make a connection, use the distributor as a termination resistor cannot
be fitted.
Connect the termination resistor to only the inverter remotest from the
computer. (Termination resistor: 100Ω)
SDB
SDA
RDB
RDA
FG
SG
CSB
CSA
RSB
RSA
RDB
RDA
SDB
SDA
SG
(Note 1)
Computer Side Terminals
Signal name 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
Inverter
PU connector
0.2mm or more
2
SDB
SDA
RDB
RDA
FG
SG
CSB
CSA
RSB
RSA
(Note 1)
SG
RDB RDA SDB SDA
SG
RDB RDA SDB SDA
SG
RDB RDA SDB SDA
Computer
Station 1
Station 2
Station n
Inv
e
r
te
rInv
e
r
te
rInv
e
r
te
r
Termination
resistor
(Note 2)
Cable connection and signal direction
10 BASE-T Cable
M4500E.book 31 ページ ２００５年２月２２日 火曜日 午後５時７分