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Local Duplex – XON/XOFF Pacing
RS-422A
IBM Parallel Attachment
The 4247 Printer supports the IBM Parallel printer interface. A single, 36-pin
connector is mounted on the adapter card.
The PC-parallel interface attaches to the host with a standard PC Parallel printer
cable (IBM part number 92F3176) up to 1.8 m (6 ft) in length.
Table 16. IBM Parallel Connector Pin Assignments
Pin Number Signal Name Description
1 -STROBE Strobe
2 - 9 DATA Eight Data Lines
10 -ACKNLG Acknowledge
11 BUSY Busy
12 PE Out of Forms
13 SLCT Printer Selected
14 -AUTO FEED XT Automatic Line Feed on EOL
15 Unused
16 LOGIC GND Logic Ground
17 CHASSIS GROUND Chassis Ground
18 Unused
19 - 30 GROUND Ground
31 -INIT Initialize Printer
32 -ERROR Printer Error
33 GROUND Ground
34, 35 Unused
(7)
(2)
(7)
(3)
(20)
(6)
(3)
(2)
(20)
(6)
SG
RXD
DTR
SG
TXD
RTS
CTS
TXD
RXD
CTS
RTS
DSR
(4)
DTR
(5)
(5)
(4)
DSR
Computer
Printer
(19)
(25)
(15)
(17)
+RXD
+TXD
-
-
RXD
TXD
RXD
RXD
TXD
TXD
-
+
-
+
Computer
Printer
Chapter 8. Supplies, Forms, and Cables 157