WeP LQ540DX User Manual page 29

13 SLCT
14 AUTO
15 NC
16 GND
17 CHASSIS Printers chassis ground, GND which is
18 --
19 - 30 --
31 INIT
controller is reset to its power-up state and the print buffer is cleared.
This level is normal HIGH; its pulse width must be more than 50 µS at
the receiving terminal level.
32 ERROR
33 GND
34 NC
35
36 SLCT IN
• The column heading "Direction" refers to the direction of signal flow as
viewed from the printer.
OUT Pulled up to 5 Volts through
1.3 K ohm resistance.
IN When this signal is LOW
FEEDLOW, the paper is
XT
printing.
Not used
Logic ground level
isolated from the logic ground.
NC Not used
GND Twisted-pair return signal
ground level
IN When this level becomes LOW, the printer
OUT This level becomes LOW
when the printer is:
1. in paper out state
2. off line
3. in error state
Same as for Pins 19-30
Not used
OUT Pulled up to 5 volts through
3.3 K ohm resistance.
OUT The DC1/DC3 code is valid
Only when this signal is HIGH.
29
automatically fed
1 line after