IBM 4247 User Manual

Table 41. RS-422C Connector Pin Assignments
Pin Signal Name Description
15 -RXD Receive Data
17 +RXD Receive Data
19 -TXD Transmit Data
25 +TXD Transmit Data
Table 42. Parallel Connector Pin Assignments
Pin Signal Name Description
1 -STROBE Strobe
2-9 Data Eight Data Lines
10 -ACKNLG Acknowledge
11 BUSY Busy
12 PE Out of Paper
13 SLCT Printer Selected
14 -AUTO FEED XT Automatic Line Feed on
EOL
15 Unused
16 LOGIC GROUND Logic Ground
17 CHASSIS
GROUND
Chassis Ground
18 +5 V DC NPS 540+ (P/N 30H4052)
Power
19-30 GROUND Ground
31 -INIT Initialize Printer
Chapter 3. Circuit Diagrams
263

IBM 4247 Specifications

General

Brand	IBM
Model	4247
Category	Printer
Language	English