Epson V7 User Manual

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Wiring Diagram 7

- Terminating Resistance Setting

Set the DIP switch 7 and 8 of the V7 series to the OFF position.  Connect 
terminating resistance to the serial connector (CN1) of the V7 series as shown 
below.  If the terminating resistance is not connected, a communication error may 
occur.

Wiring Diagram 8

V7  (CN1)

D-sub  25pin(Male:     )

FG

SG

+SD

−

SD

+RD

SG

PLC

D-sub 9pin(Male:    )

+TxD/RxD

−

TxD/RxD

5

3

8

−

RD

7

1

12

13

24

25

* Use shielded twist-pair cables.

D-sub 25-pin (male)

D-sub 9-pin (male)

V7  (CN1)

D-sub  25pin(Male:     )

FG

SG

5V

−

SD

+RD

1

7

9

+SD

12

13

24

−

RD

25

390

390

220

D-sub 25-pin (male)

V7  (CN1)

D-sub  25pin(Male:     )

FG

SG

+SD

-SD

+RD

PLC

D-sub 9pin(Male:    )

GND

DI+

6

5

-RD

7

1

12

13

24

25

DI

-

8

DO+

1

DO

-

7

* Use shielded twist-pair cables.

D-sub 25-pin (male)

D-sub 9-pin (male)