Lexmark 248X ユーザーズマニュアル
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Section 6: Using the Printer Interface
Using an IBM AT Personal Computer (RS-232C)
If you are using an IBM AT or compatible computer, use a 9-pin to 25-pin EIA
RS-232C cable.
RS-232C cable.
We recommend one of the following for a 9-pin to 25-pin cable:
•
IBM P/N 6450242 (254 mm or 10 in.)
•
IBM P/N 6450217 (3 m or 10 ft.)
The following illustration shows the pin assignments for the 9-pin to 25-pin
RS-232C serial cable.
RS-232C serial cable.
Serial Communication Parameters (RS-232C)
The acceptable values for serial communications parameters follow.
Voltage Level Range
The maximum voltage level range for control lines or data lines is from
± 25 positive V dc to ± 25 negative V dc.
± 25 positive V dc to ± 25 negative V dc.
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
9
Shield
1
2
3
4
5
6
7
8
20
22
2
3
4
5
6
7
8
20
22
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
TXD
RXD
RTS
CTS
DSR
GND
DCD
DTR
RXD
RTS
CTS
DSR
GND
DCD
DTR
2
3
4
5
6
7
8
20
3
4
5
6
7
8
20
Shield
1
2
3
4
5
6
7
2
3
4
5
6
7
20
F. GND
TXD
RXD
RTS
CTS
DSR
L. GND
RXD
RTS
CTS
DSR
L. GND
DTR
IBM 9-Pin to 25-Pin Adapters
Lexmark Null Modem Serial Cable
6450242 (254 mm or 10 in.)
1038693 (15.24 m or 50 ft.)
6450217 (30.4 m or 10 ft.)
9 (F)
25 (M)
25 (F)
25 (M)