MITSUBISHI ELECTRIC FR-S520 - Manual (Page 52)

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1
Use the connectors, cables and converter which are available on the market.
Introduced products (as of June, 2000)
*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 (One with connector and cable is also available)
Mitsubishi Electric Engineering Co., Ltd.
<Wiring methods>
1) Wiring of one RS-485 computer and one inverter
Receive data
Receive data
FG
RS-485 connector
RSB
CSB
RSA
CSA
SG
SDB
SDA
RDB
RDA
SG
RDB
RDA
SDB
SDA
(*1)
Inverter
0.3mm or more
Computer Side Terminals
Signal
name
Description
Send data
Request to send
Signal ground
Frame ground
Send data
Request to send
Clear to send
Clear to send
Cable connection and signal direction
10 BASE-T Cable
2
2) Wiring of one RS-485 computer and "n" inverters (several inverters)
SDB
SDA
RDB
RDA
FG
SG
CSB
CSA
RSB
RSA
RDB RDA SDB SDA
SG SG SG
RDB RDA SDB SDA RDB RDA SDB SDA
Computer
Termination
resistor
(*2)
Cable connection and signal direction
10 BASE-T Cable
(*1)
Station 1 Station 2 Station n
Inverter Inverter Inverter
REMARKS
*1. Make connection in accordance with the instruction manual of the computer to be
used with. Fully check the terminal numbers of the computer since they change with
the model.
*2. The inverters may be affected by reflection depending on the transmission speed or
transmission distance. If this reflection hinders communication, provide a termination
resistor. When the RS-485 connector is used for connection, a termination resistor
cannot be fitted, so use a distributor. Connect the termination resistor to only the
inverter remotest from the computer. (Termination resistor: 100
Ω
)