Epson ActionPrinter 2250 User Manual page 81

Technical Specifications
Signal Return Signal
Pin
Pin
GND
INIT
16
32
ERROR
GND
35 +5v
-
36
Note:
The column heading "Direction" refers to the direction of signal flow as
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viewed from the printer.
"Return" denotes the twisted-pair return, to be connected at signal ground
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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.
All interface conditions are based on the TTL level. Both the rise and fall times
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of each signal must be less than 0.2 microseconds.
Data transfer must be carried out by observing the ACKNLG or BUSY signal.
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Data transfer to this printer can be carried out only after receipt of the
ACKNLG signal or when the BUSY signal is LOW.
A-10 Appendix
Direction
Not used
-
Twisted-pair return signal ground level.
IN When this level becomes LOW,
the printer controller is reset to its
power-up 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
OUT
printer is:
1) in a paper-out state
2) in an error state
Same as for pins 19-30.
Not used
OUT Pulled up to 5V through 1.0 KQ
resistance.
-
Not used
Description