I-O Corporation TC4000, Руководство пользователя

Страница: 18 / 23

Hardware User’s Guide
Connectors and Cables 18
COM1/COM2 ( serial ports ) cables
Serial devices such as modems and printers use 25-pin D-type connectors for RS232
connections. In order to connect RS232 devices with 25-pin connectors, 9-pin connector signals
have to be converted to 25-pin connector signals. The diagram below shows their respective
connections.
9-pin to 25-pin Cross Connection
9-pin to 25-pin Straight Connection
Printer ( parallel port ) cable
This figure provides details of pin-connections of the Standard Centronics parallel cable. Some
manufacturers have changed pin-functions or polarity on their printers. For such printers, custom
cables may be necessary. For details, refer to your printer manual.
9 Pin
Connector
25 Pin
Connector
3
RXD
2
TXD
5
CTS
4 RTS
6
DSR
7
SGND
8
DCD
20
DTR
TXD 3
RXD 2
RTS 7
CTS 8
DSR 6
SGND 5
DCD 1
DTR
4
(Thin Client)
7
4
3
5
1
2
6
8 4
20
2
7
8
3
6
5
9 Pin
Connector
(Thin Client)
25 Pin
Connector
RTS
DTR
TXD
GND
DCD
RXD
DSR
CTS
RTS
DTR
TXD
GND
DCD
RXD
DSR
CTS
1
2-9
10
11
12
13
14
15
-Strobe
PARALLEL
DEVICE
PARALLEL
PORT
+ Data Bits 0 - 7
- Acknowledge
+ Busy
+ Paper End
+ Select In
- Auto Feed
- Error
- INIT
- Select
Ground
16
17
18-25