Hardware manual

2 Mitsubishi

2-55

Chap.2

Connection Diagram 2-2: Computer Link Unit (RS-485) to MICRO/I

PLC(RS-485/422) HG1F/2F/2S/3F/4F(RS-485/422)

Pin No.

Name

HG1F

Connector

HG1F

Terminal

HG2F/

3F/4F

HG2S

FG FG Cover - 1 1

SDA TERM - - 9 -

SDB RDA(RD+) 2 3 10 32

RDA RDB(RD-) 7 4 16 33

RDB SDA(SD+) 1 1 11 30

SG SDB(SD-) 6 2 15 31

CS- 9 - 18 37

RS- 8 - 19 35

CS+ 4 - 21 36

RS+ 3 - 22 34

SG 5 5 7 29

Internal

termination

resistor

330-Ohm

D-sub, 9P connector socket type (HG1F)

D-sub, 25P connector socket type (HG2F/3F/4F)

D-sub, 37P connector plug type (HG2S)

Screw-down terminal block

Shield Wire

- When using the QJ71C24 Serial Communication Unit, connect a terminator resistor in

accordance with the instruction manual.

- There is no pin No. corresponding to TERM on the HG1F/HG2S. When inserting a

termination resistor, use a communication switch. For the setting of the switch, refer to "3

Important Points Regarding Wiring" in Chapter 1.

When you use the Terminal Block type of HG1F, make sure to configure the Hardware Flow

control to NONE because the HG1F doesn’t have control lines.