Mitsumi electronic 55K Wiring method, Wiring of one RS-485 computer and one inverter, Max m

INSTALLATION AND WIRING

2) When a computer having an RS-232C interface is used with inverters

RS-232C connector RS-232C cable

RS-485 terminal

Computer

		Station 1	Station 2	Station n
Max. 15m		Inverter	Inverter	Inverter
		PU connector	PU connector	PU connector
	(49.21feet)
	*Converter	(Note 1)	(Note 1)	(Note 1)

Terminal resistor

Distribution terminal 10BASE-T cable(Note 2)

*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

				Inverter
Computer Side Terminals				PU
Signal	Description	Cable connection and signal direction		connector
name
			10BASE-T Cable
RDA	Receive data	SDA
RDB	Receive data			SDB
SDA	Send data			RDA
SDB	Send data			RDB
RSA	Request to send
RSB	Request to send		Note 1
CSA	Able to send
CSB	Able 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)

Computer		Cable connection and signal direction
			10 BASE-T Cable
RDA
RDB				Termination
SDA
				resistor
SDB
				(Note 2)
RSA
RSB	Note	RDB RDA SDB SDA	RDB RDA SDB SDA	RDB RDA SDB SDA
CSA	1
CSB
SG		SG	SG	SG
FG		Station 1	Station 2	Station n
		Inverter	Inverter	Inverter

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 Ω )

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