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5–7Interfaces
Centronics Parallel Interface
Table 5–3. Centronics Interface Connector Pin Assignments
Input Signals Output Signals Miscellaneous
Signal Pin Signal Pin Signal Pin
DATA
LINE 1
2
Return 20
ACKNOWLEDGE 10
Return 28
CHASSIS GROUND
17
DAT
A LINE 2
3
Return 21
ONLINE 13
Return 28
GROUND 30
DAT
A LINE 3
4
Return 22
FAULT 32
Return 29
Spares 14
DAT
A LINE 4
5
Return 23
PAPER EMPTY 12
Return 28
No connection
34, 35, 36
DAT
A LINE 5
6
Return 24
BUSY 11
Return 29
+5 Volts 18
DAT
A LINE 6
7
Return 25
DAT
A LINE 7
8
Return 26
DAT
A LINE 8
9
Return 27
DATA STROBE 1
Return 19
PAPER INSTRUCTION 15
Return 29
PRIME 31
Return 30
The length of the data cable from the host computer to the printer must not
exceed 15 feet (5 meters).