Epson C107001 User Manual - Page 120

Signal Return, isolated from the logic ground.

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Interface Specifications Signal Return Pin Pin 11 29 Signal BUSY 12 30 PE 13 - SLCT 14 - AUTO FEED XT 15 - 16 - 17 - 18 - 19-30 - 31 16 NC GND CHASSIS GND NC GND INIT 32 - ERROR Direction Description OUT OUT OUT IN IN OUT A HIGH signal indicates that the printer cannot receive data. The signal goes HIGH in the following cases: 1) During data entry (ea. char. time) 2) During printing 3) When the PAUSE button is pressed 4) During an error state. A HIGH signal indicates that the printer is out of paper. Pulled up to 5 V through 3.3 Kohm resistance. When this signal is LOW, the paper is automatically fed one line after printing. (The signal level can be fixed to this by setting DIP switch 2-4 to on.) Not used. Logic ground level. Printer's chassis ground, which is isolated from the logic ground. Not used. Twisted-pair return signal ground level. 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 printer is: 1) in a paper-out state 2) when the PAUSE button is pressed 3) in an error state. Technical Specifications 7-11

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Interface Specifications
Signal Return
Pin
Pin
Signal
Direction
Description
11
29
BUSY
OUT
A HIGH signal indicates that the printer
cannot receive data. The signal goes
HIGH in the following cases:
1) During data entry (ea. char. time)
2) During printing
3) When the PAUSE button is pressed
4) During an error state.
12
30
PE
OUT
A HIGH signal indicates that the printer
is out of paper.
13
-
SLCT
OUT
Pulled up to 5 V through 3.3 Kohm
resistance.
14
-
AUTO
IN
When this signal is LOW, the paper is
FEED
automatically fed one line after printing.
XT
(The signal level can be fixed to this by
setting DIP switch 2-4 to on.)
15
-
NC
-
Not used.
16
-
GND
-
Logic ground level.
17
-
CHASSIS
-
Printer’s chassis ground, which is
GND
isolated from the logic ground.
18
-
NC
-
Not used.
19-30
-
GND
-
Twisted-pair return signal ground level.
31
16
INIT
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.
32
-
ERROR
OUT
This level becomes LOW when the
printer is:
1) in a paper-out state
2) when the PAUSE button is pressed
3) in an error state.
Technical Specifications
7-11