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GENERAL SPECIFICATIONS
3. Connector Signals
3-1. Parallel Interface
Pin No. Signal Name Direction Functional Description
Goes from High to Low (for at least 0.5 microseconds) when data
are valid.
Eight-bit character data. DATA8 is the most significant bit; DATA
1 is the least significant bit.
High is logic 1 and Low is logic 0.
Approx.9-Microsecond Low pulse acknowledges receipt of data.
Low when the printer is ready to accept data.
Goes High if the printer runs out of paper.
Can be held Low permanently by turning DIP switch 1-5 off.
High when the printer is on-line.
Unused
Signal Ground
Printer’s chassis ground, isolated from signal ground.
External supply of +5V DC.
Twisted pair return signal ground level.
Low input resets the printer to its power-up condition.
Goes Low to signal that the printer cannot print due to an error
condition.
External ground
Unused
Always High.
1 STROBE IN
2 DATA 1 IN
3 DATA 2 IN
4 DATA 3 IN
5 DATA 4 IN
6 DATA 5 IN
7 DATA 6 IN
8 DATA 7 IN
9 DATA 8 IN
10 ACK OUT
11 BUSY OUT
12 PAPER OUT OUT
13 SELECTED OUT
14, 15 (NC)
16 SIGNAL GND
17 CHASSIS GND
18 +5VDC OUT
19 ~ 30 GND
31 INPUT-PRIME IN
32 ERROR OUT
33 EXT GND
34, 35 (NC)
36 SELECT-IN IN
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