Mitsubishi FR-F500 Instruction Manual page 34

2) When a computer having an 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 3)
Use the connector, cables and converter, which are available on the market.
Note: 1. Connector: RJ45 connector
Example: 5-554720-3, Tyco Electronics Corporation
2. Cable: Cable conforming to EIA568 (such as 10BASE-T cable)
Example: SGLPEV 0.5mm×4P (Twisted pair cable, 4 pairs), Mitsubishi Cable Industries, Ltd.
(Do not use pins No. 2 and 8 (P5S)).
3. *Commercially available converter examples:
Model: FA-T-RS40
Converter
Mitsubishi Electric Engineering Co., Ltd.
<Wiring method>
1) Wiring of one RS-485 computer and one inverter
Computer Side Terminals
Signal
Description
name
RDA Receive data
RDB Receive data
SDA Send data
SDB Send data
RSA Request to send
RSB Request to send
CSA Able to send
CSB Able to send
SG Signal ground
FG Frame ground
2) Wiring of one RS-485 computer and "n" inverters (several inverters)
Computer
RDA
RDB
SDA
SDB
RSA
RSB
CSA
CSB
SG
FG
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 )
Station 1
Inverter
Max. 15m
PU connector
(49.21feet)
(Note 1)
*Converter
Distribution terminal
10BASE-T cable
Cable connection and signal direction
10BASE-T Cable
Note 1
Cable connection and signal direction
10 BASE-T Cable
Note
1
SG
Station 1
Inverter
INSTALLATION AND WIRING
Station 2
Inverter
PU connector
(Note 1)
(Note 2)
Inverter
PU
connector
SDA
SDB
RDA
RDB
2
0.3mm or more
SG
SG SG
Station 2 Station n
Inverter Inverter
23
Station n
Inverter
PU connector
(Note 1)
Terminal resistor
Termination
resistor
(Note 2)