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Tech Stuff - Centronics

If you are unlucky you may still come across this connector. No one remembers Centronics (well some of us do) but their connector is still used to this day (is this a legacy or what!).

Centronic Printer Connector

An exotic 36 pin connector invented (I guess) by the old Centronics company who made printers (nah!!).

Centronics Connector
Connector Name Function/Notes Connector Name Function/Notes
1 Data Strobe Active LOW 19 Data Strobe RETURN
2 Data Bit 1 LSB 20 Data Bit 1 RETURN
3 Data Bit 2 - 21 Data Bit 2 RETURN
4 Data Bit 3 - 22 Data Bit 3 RETURN
5 Data Bit 4 - 23 Data Bit 4 RETURN
6 Data Bit 5 - 24 Data Bit 5 RETURN
7 Data Bit 6 - 25 Data Bit 6 RETURN
8 Data Bit 7 - 26 Data Bit 7 RETURN
9 Data Bit 8 MSB 27 Data Bit 8 RETURN
10 Acknowledge Active LOW 28 Acknowledge RETURN
11 Busy Active HIGH 29 Busy RETURN
12 Paper End Active HIGH 30 Input Prime RETURN
13 Select Active HIGH 31 Input Prime Active LOW
14 Supply Ground - 32 Fault Active LOW
15 Oscillator Tx - 33 Undefined -
16 Logic Ground - 34 Undefined -
17 Chassis Ground - 35 Undefined -
18 +5V Power 36 Undefined -


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