Epson Stylus 800 Series User Manual page 72

Note:
viewed from the printer.
ground level. For the interface wiring, be sure to use a twisted-pair
cable for each signal and to complete the connection on the return
side.
times of each signal must be less than 0.2 microseconds,
ERROR
OUT
NC
OUT
NC
When this level becomes
LOW, the printer controller is
reset to its power-on state
and the print buffer is
cleared This level is
normally HIGH: its pulse
width must be more than 50
microseconds at the
receiving terminal.
This level becomes LOW
when the printer is:
Same as for pins 19-30
Not used
Pulled up to 5 V through
1 .O kR resistance
Not used
Appendix A-9