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Salter Brecknell 304BP User Manual

Page 22

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22

APPENDIX B: SERIAL PORT INFORMATION

B.1 SERIAL PORT HARDWARE

The COM1 serial port is a full duplex RS-232 port designed for connection to one of the following

devices:

Serial receipt printer (dot matrix)

Computer

Remote display

S-630 or S-650 Scale (to transmit APW)

Figure B-1 shows the serial port pin assignments for the scale’s female DSUB9 connector. Refer to

Figures B-2 and B-3 for some suggested cable diagrams.

1. Plug the serial printer or computer communication cable (not included) directly into the

scale’s DSUB9 serial port connector.

Pin No.

Pin Name

2

Receive Data

3

Transmit Data

Signal Level

RS-232
RS-232

5

Signal Ground

RS-232

2

3

5

Front View

Figure B-1: Pin assignments for the DSUB9 serial port connector

SCALE

PC

2 RXD

RXD 2
TXD 3

S. GND 5

3 TXD
5 S. GND

6 DSR

4 DTR

8 CTS

DSUB9

DSUB9

SCALE

PRINTER

3 RXD

TXD 3

S. GND 5

7 S. GND

DSUB9

DSUB25

FIGURE B-2. Cable Diagram for Scale to PC

FIGURE B-3. Cable Diagram for Scale to Printer