Epson FX 1170 User Manual - Page 138

signal is LOW., only after receipt of the ACKNLG signal or when the BUSY - head cable

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fnterface Speclflcattos Signal Direction Description GND - NC - OUT SLCT IN IN Same as for pins 19-30 Not used Pulled up to 5V through 3.3 kQ resistance The DCl/DC3 code is valid only when this signal is HIGH. This signal is factory-set to HIGH. Note: 1 The column heading "Direction" refers to the direction of signal flow as viewed from the printer. "Return" denotes the twisted-pair return, to be connected at signal 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. All interface conditions are based on the TTL level. Both the rise and fall times of each signal must be less than 0.2 microseconds. Data transfer must be carried out by observing the ACKNLG or BUSY signal. Data transfer to this printer can be carried out only after receipt of the ACKNLG signal or when the BUSY signal is LOW. Technical Specifications 7-13

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fnterface
Speclflcattos
Signal
Direction Description
GND
-
Same as for pins 19-30
NC
-
Not used
OUT
Pulled up to 5V through 3.3
kQ
resistance
SLCT IN IN
The
DCl/DC3
code is valid only when this
signal is HIGH. This signal is factory-set to
HIGH.
Note:
The column heading “Direction” refers to the direction of
signal flow as viewed from the printer.
“Return” denotes the twisted-pair return, to be connected at
signal 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.
All interface conditions are based on the TTL level. Both the
rise and fall times of each signal must be less than 0.2
microseconds.
Data transfer must be carried out by observing the ACKNLG
or BUSY signal. Data transfer to this printer can be carried out
only after receipt of the ACKNLG signal or when the BUSY
signal is LOW.
1
Technical Specifications
7-13