Instruction manual

INSTALLATION AND WIRING
23
2) When a computer having a RS-232C interface is used with inverters
Computer
Inverter
Station 1
PU connector
Inverter
Station 2
PU connector
Inverter
Station n
PU connector
Terminal resistor jumper
Max. 15m
RS-232C connector
RS-232C cable
RS-485 terminal
*Converter
*Converter available on the market is required.
10BASE-T cable
Distribution terminal
Note: 1. Use the connector, cables and converter which are available on the market.
Connector: RJ45 connector
Example: Nippon AMP Co., Ltd.
Cable: Cable conforming to EIA568B (such as 10BASE-T cable)
Example: SGLPEV 0.5mm
×
4P, Mitsubishi Cable Industries, Ltd.
RS-485/RS-232C converter
Example: FA-T-RS40, Industrial System Div., Mitsubishi Electric Engineering Co., Ltd.
or
: Cable with built-in interface DAFXI-CAB series, Connector conversion cable
DINV-485CAB, Dia Trend Co., Ltd.
<Wiring method>
1) Wiring of one 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
Clear to send
Clear to send
Signal ground
Frame ground
PU connector
SDA
SDB
RDA
RDB
RDR
SG
*2
∗1 Terminal resistor
jumper
0.3mm or more
2
Cable connection and signal direction
10BASE-T Cable
Inverter
2) Wiring of one computer and "n" inverters (several inverters)
*2
Computer
RDA
RDB
SDA
SDB
RSA
RSB
CSA
CSB
SG
FG
Station 1
SG
RDB RDA SDB SDA
Station 2
SG
RDB RDA SDB SDA
Station 3
SG
RDR RDB RDA SDB SDA
Terminal
resistor
jumper (*1)
Inverter
Inverter Inverter
Note: 1. Connect the terminal resistor jumper only to the inverter remotest from the computer.
(Terminal resistor: 100
Ω
)
2. 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.