Centronics Parallel Interface

Centronics Interface

The Centronics Interface Connector is a standard printer connector. It uses a 36 pins amphenol connector. The printer is equipped with the female connector.

Pin Abbreviation Signal / Function

1 STROBE - Strobe (active low to read data)

2 DATA 1 - data line 1

3 DATA 2 - data line 2

4 DATA 3 - data line 3

5 DATA 4 - data line 4

6 DATA 5 - data line 5

7 DATA 6 - data line 6

8 DATA 7 - data line 7

9 DATA 8 - data line 8

10 ACKNLG - Acknowledge (pulsed low to indicate that data has been received)

11 BUSY - Busy (taken high under the following conditions:
     (a) during data entry
     (b) during printing operation
     (c) when printer is OFF-LINE
     (d) during print error status)

12 PE - Paper end (taken high to indicate that the printer is out of paper)

13 SLCT - Select (taken high to indicate that the printer is in the selected state)

14 AUTO FEED XT - Automatic feed (when this input is taken low, the printer is instructed to produce an automatic line feed after printing. This function can be selected internally by means of a DIP switch)

15 n.c. - Not connected (unused)

16 0V - Logic ground

17 CHASSIS GND - Printer chassis (normally isolated from logic ground at the printer)

18 n.c. - Not connected (unused)

19-30 GND - Signal ground (originally defined as 'twisted pair earth returns' for pin numbers 1 to 12 inclusive)

31 INIT - Initialize (this line is pulsed low to reset the printer controller)

32 ERROR - Error (taken low by the printer to indicate:
     (a) PAPER END state
     (b) OFF-LINE state
     (c) error state)

33 GND - Signal ground

34 n.c. - Not connected (unused)

35 LOGIC 1 - Logic 1 (usually pulled high via 3.3 kohm)

36 SLCT IN - Select input (data entry to printer is only possible when this line is taken low, but this function may beł disabled by means of an internal DIP switch)

Pin	Abbreviation	Signal / Function
1	STROBE	- Strobe (active low to read data)
2	DATA 1	- data line 1
3	DATA 2	- data line 2
4	DATA 3	- data line 3
5	DATA 4	- data line 4
6	DATA 5	- data line 5
7	DATA 6	- data line 6
8	DATA 7	- data line 7
9	DATA 8	- data line 8
10	ACKNLG	- Acknowledge (pulsed low to indicate that data has been received)
11	BUSY	- Busy (taken high under the following conditions: (a) during data entry (b) during printing operation (c) when printer is OFF-LINE (d) during print error status)
12	PE	- Paper end (taken high to indicate that the printer is out of paper)
13	SLCT	- Select (taken high to indicate that the printer is in the selected state)
14	AUTO FEED XT	- Automatic feed (when this input is taken low, the printer is instructed to produce an automatic line feed after printing. This function can be selected internally by means of a DIP switch)
15	n.c.	- Not connected (unused)
16	0V	- Logic ground
17	CHASSIS GND	- Printer chassis (normally isolated from logic ground at the printer)
18	n.c.	- Not connected (unused)
19-30	GND	- Signal ground (originally defined as 'twisted pair earth returns' for pin numbers 1 to 12 inclusive)
31	INIT	- Initialize (this line is pulsed low to reset the printer controller)
32	ERROR	- Error (taken low by the printer to indicate: (a) PAPER END state (b) OFF-LINE state (c) error state)
33	GND	- Signal ground
34	n.c.	- Not connected (unused)
35	LOGIC 1	- Logic 1 (usually pulled high via 3.3 kohm)
36	SLCT IN	- Select input (data entry to printer is only possible when this line is taken low, but this function may beł disabled by means of an internal DIP switch)