APPENDIX

C-2. RS-232C Connector

Pin No.

Signal

Function

I/O

Pin No.

Signal

Function

I/O

name

direction

name

direction

 

 

 

 

1

FG

Frame ground

 

*14

SG2

Ground for +24V

IN

2

TXD

Send data

OUT

15

 

 

3

RXD

Receive data

IN

16

 

 

 

 

 

 

 

 

 

 

4

RTS

Request to send

OUT

17

 

 

5

CTS

Clear to send

IN

*18

+24V

Drive power for

IN

6

DSR

Data set ready

IN

mechanical section

 

 

 

 

 

 

 

 

 

 

 

7

SG

 

 

*19

+24V

Drive power for

IN

8

 

 

mechanical section

 

 

 

 

 

9

 

 

20

DTR

Data terminal ready

OUT

 

 

 

 

 

 

 

 

10

 

 

21

 

 

11

 

 

22

 

 

12

 

 

23

 

 

 

 

 

 

 

 

 

 

*13

SG2

Ground for +24V

IN

24

 

 

 

 

 

 

25

INIT

 

IN

The signals marked with “*” should not be used to supply power if the AC adapter is used. Doing so may result in damage to the power supply.

13

12

11

10

9

8

7

6

5

4

3

2

1

25 24 23 22 21 20 19 18 17 16 15 14

<Viewed from Connector Surface>

Note: Connector on printer side: DALC-J25PAF-23L8 (from Japan Avia- tion Electronics Industry, Ltd.) or equivalent

Connector on cable: DA-25SF-N (from Japan Aviation Electronics Industry, Ltd.) or equivalent

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Image 104
Star Micronics TSP552 user manual RS-232C Connector