Mitsubishi FR - S500 Wiring methods, Wiring of one RS-485 computer and one inverter

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

Computer Side Terminals					Inverter
Signal	Description	Cable connection and signal direction
name			10 BASE-T Cable		RS-485 connector
RDA	Receive data				SDA
RDB	Receive data				SDB
SDA	Send data				RDA
SDB	Send data				RDB
RSA	Request to send
RSB	Request to send			(*1)
CSA	Clear to send
CSB	Clear to send			0.3mm2 or more
SG	Signal ground				SG
FG	Frame ground

2) Wiring of one RS-485 computer and "n" inverters (several inverters)

Cable connection and signal direction

Computer		10 BASE-T Cable
RDA
RDB
SDA
SDB
RSA		RDB RDA SDB SDA	RDB RDA SDB SDA	RDB RDA SDB SDA
RSB	(*1)
CSA
CSB		SG	SG	SG
SG
FG		Station 1	Station 2	Station n
		Inverter	Inverter	Inverter

REMARKS

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Termination resistor (*2)

*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: 100Ω )

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