Epson EPL-7500 User Manual - Page 185

Signal, Return, Direction, Description, All time HIGH

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Signal Pin 11 12 13 14 15 16 17 18 19-30 31 32 33 34 Return Pin 29 30 Signal Direction Description BUSY PE SLCTOUT AUTO FEED NC GND CHASSIS GND NC GND INIT ERROR GND NC OUT OUT OUT IN IN OUT A HIGH signal indicates that the printer cannot receive data. The signal goes HIGH in the following cases: • During data entry (each char. time) • When off line •. During printer-error state A HIGH signal indicates that the printer is out of paper. All time HIGH Not used Logic ground level. Printer's chassis ground, which is connected with the logic ground. Not used Twisted-pair return signal ground level. When this signal goes LOW, the printer operates as same as the printer receives Ctrl-C and Ctrl-D. This level becomes LOW when the printer is l in paper-out state • in error state • off line Same as for Pins 19-30. Not used. Technical Specifications 8-11

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Signal
Pin
Return
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:
• During data entry (each char. time)
°
When off line
•. During printer-error state
12
30
PE
OUT
A HIGH signal indicates that the printer is
out of paper.
13
SLCTOUT
OUT
All time HIGH
14
AUTO
FEED
IN
Not used
15
NC
16
GND
CHASSIS
GND
Logic ground level.
Printer’s chassis ground, which is
connected with the logic ground.
17
18
NC
Not used
GND
Twisted-pair return signal ground level.
19-30
31
INIT
IN
When this signal goes LOW, the printer
operates as same as the printer receives
Ctrl-C and Ctrl-D.
This level becomes LOW when the printer
is
l
in paper-out state
• in error state
• off line
ERROR
OUT
32
33
GND
Same as for Pins 19-30.
34
NC
Not used.
Technical Specifications
8-11