Mitsubishi Electric FR-A520-0.4K-NA Instruction Manual page 33

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