Epson LX-810 Technical Manual page 21

Table 1-11. Connector Pin Assignments and Signal Functions (Cont.)
Pin No. Signal Name
14 AUTOFEED-XT
15
16
17 Chassis GND
9 to 3 0
31 I NIT
3 2 ERROR
3 3
3 4
35
36
NOTES: 1. "DIR" refers to the direction of the signal flow as viewed from the printer.
2. "Return" denotes a twisted-pair return line.
3.
The cable used must be shielded to prevent noise.
4.
All interface conditions are based on TTL levels. Both the rise and fall times of all signals
must be less than 0.2 us.
5. The AUTO FEED-XT signal c:an be set LOW by DIP switch 2-4.
6. The SELECT-IN signal can ble set LOW by jumper 1.
7. Printing tests, including interface circuit tests, can be performed without using external
equipment by setting DATA 1-8 of the interface connector to certain codes and connecting
the ACKNLG signal to the STROBE signal.
Return Pin No. DIR
—
In
— —
In
o u t
—
—
— —
—
—
1-13
Functional Description
if "LOW" when the printer is initialized, a line
automatically performed by input of "CR" code. (Auto
LF)
Not used
Ground for twisted-pair grounding
Chassis ground level of printer
Not used
Grounds for twisted-pair grounding
Pulse (Width: 50#s min., active "LOW") input for printer
initialization.
"LOW" indicates some error is occurred in the printer.
Ground for twisted-pair grounding
used
Not
Always "HIGH". (Pulled up to +5V through 3.3 Kohms
register.)
If "LOW" when prinater is initialized, the DC1/DC3
control is disabled.
REV.-A
feed is