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APPENDIX
Connectors and Signals (Parallel Interface)
Pin No.
Signal
IN/OUT Function
Name
1 STROBE IN Signals when data is ready to be read. Signal goes
from HIGH to LOW (for at least 0.5 microsec.)
when the data is available.
2-9 DATA1-8 IN These signals provide the information of the first
to eighth bits of parallel data. Each signal is at
HIGH level for a logical 1 and at a LOW level for
a logical 0.
10 ACK OUT A 9 microsecond LOW pulse acknowledges re-
ceipt of the data.
11 BUSY OUT When this signal goes to LOW, the printer is
ready to accept data. When the printer is in one of
the conditions below, “HIGH” is set.
1. Data is being entered.
2. Off line.
3. Error condition.
12 PAPER OUT This signal is normally LOW. It will go to HIGH
OUT if the printer runs out of paper.
13 SELECTED OUT This signal is HIGH when the printer is online.
14-15 N/C Unused
16 SIGNAL Signal ground.
GND
17 CHASSIS Chassis ground, isolated from logic ground.
GND
18 +5VDC +5VDC (Max 50 mA)
19-30 GND Twisted pair return the signal to ground level.
31 RESET IN When this signal goes to LOW, the printer is reset
to its power-on condition.
32 ERROR OUT This signal is normally HIGH. This signal goes to
LOW to signal that the printer cannot print due to
an error condition.
33 EXT GND External ground.
34
COMPULSION
OUT Compulsion signal
35 N/C – Unused.
36 – – This signal is normally set to HIGH on the printer side.
This connector mates with an Amphenol
57-30360 connector
Parallel interface connector (printer side)