5
Connection Cables and Cable Wiring
In this chapter, we illustrate the possible connections and cable wiring for the
In serial data communications, DTE stands for Data Terminal Equipment, such as a PC’s COM1/2, serial printers, and terminals, and DCE stands for Data Communication Equipment, such as modems.
RS-232 Cable Wiring
Board Pinouts—DB44 Female
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
| Port 1 |
| Port 2 |
| Port 3 |
|
| Port 4 |
|
13 | TxD | 9 | TxD | 5 | TxD |
| 1 | TxD |
|
14 | RxD | 10 | RxD | 6 | RxD |
| 2 | RxD |
|
15 | RTS | 11 | RTS | 7 | RTS |
| 3 | RTS |
|
28 | CTS | 24 | CTS | 20 | CTS |
| 16 | CTS |
|
29 | DTR | 25 | DTR | 21 | DTR |
| 17 | DTR |
|
30 | DSR | 26 | DSR | 22 | DSR |
| 18 | DSR |
|
42 | DCD | 39 | DCD | 35 | DCD |
| 31 | DCD |
|
44 | GND | 41 | GND | 37 | GND |
| 33 | GND | |
