Lexmark 302 Manuel d'utilisateur Page 251

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|
Appendix E. Cabling Information
| Serial Attachment
| The printer attaches to a host or controller by one of two serial
| interfaces, RS-232C or RS-422A. A single 25-pin D connector
| mounted directly on the adapter card allows attachment to either
| interface.
| The RS-232C interface uses a standard serial cable up to 15.2 m (50
| ft) in length with transmission rates up to 19.2 Kbps.
| The RS-422A interface uses a serial cable up to 1219 m (4,000 ft) in
| length with transmission rates up to 38.4 Kbps.
| RS-232C Connector Pin Assignments
| Pin
| Number
| Signal
| Name
| Description
| 2| TXD| Transmit Data
| 3| RXD| Receive Data
| 4| RTS| Request to Send
| 5| CTS| Clear to Send
| 6| DSR| Data Set Ready
| 7| SG| Signal Ground
| 20| DTR| Data Terminal Ready
| RS-422A Connector Pin Assignments
| Pin
| Number
| Signal
| Name
| Description
| 15| - RXD| Receive Data
| 17| + RXD| Receive Data
| 19| - TXD| Transmit Data
| 25| + TXD| Transmit Data
Copyright IBM Corp. 1993, 1994 E-1
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