Appendix A

RS-232 Pinouts and Cable Wiring

 

 

Note : Each group of (RTS, CTS) and (DTR, DSR) pins have been shorted on A50/A51, which release the users from the hardware flow control cable wiring problem. Thus, there are two types of RS-232 cable wiring which are listed below.

Type 1: To connect RS-232 side of A50/A51 to a DTE (e.g. PC COM1/2) or DCE . (Please check the precise DTE/DCE pinouts, the following DTE/DCE pinouts is just an example)

A50/A51

DTE

A50/A51

DTE

RJ-45 Connector

DB-25 Male

RJ-45 Connector

DB-9 Male

1 DCD

8

DCD

1

DCD

1

DCD

2 DSR

20

DTR

2

DSR

4

DTR

3 RTS

5

CTS

3

RTS

 

8

CTS

 

5 TxD

3

RxD

5

TxD

2

RxD

6 RxD

2

TxD

6

RxD

3

TxD

7 GND

7

GND

7

GND

5

GND

8 CTS

 

4

RTS

8

CTS

7

RTS

 

9 DTR

6

DSR

9

DTR

 

6

DSR

 

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Moxa Technologies A60, A51 manual Appendix a