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Signal
Pin
Return Signal Direction
Pin
Description
SLCT
AUTO
FEED
XT
NC
GND
CHAS-
SIS
GND
NC
GND
INIT
OUT
IN
IN
A high signal indicates that the
printer is in the selected state.
The signal goes low in the
following cases:
1) When the SLCT IN signal
goes high
2) During a printer-error state
3)
When the interface card is
disabled
This signal can be fixed to
“high” with DIP Switch 1-5.
This function depends on
printer specifications.
Not used
Twisted-pair, return-signal
ground
Printer's chassis ground, which
is isolated from the logical
ground
Not used
Twisted-pair, return-signal
ground
When the signal level goes low,
the printer controller and the
interface card
are reset.
This
signal level is usually high; its
pulse width must be more than
50 µseconds at the receiving
terminal.
13
14
15
16
17
18
19-30
31
32
ERROR
OUT
This signal level goes low when
the printer is out of paper or in
an error state.
33
GND
Twisted-pair return signal
ground.
34
NC
Not used
13