Epson MX-80 F/T User Manual - Page 36

Table 5, cont., NOTES, As to the wiring for the interface, be sure to use a twisted-pair cable

Get Epson MX-80 F/T - Impact Printer PDF manuals and user guides View all Epson MX-80 F/T manuals
Add to My Manuals
Save this manual to your list of manuals

Page 36 highlights

Signal Return Pin No. ! Pin No. I 18 - -9 to30 - 31 - 32 33 - 34 - 35 36 - Signal Table 5 (cont.) - IDirection Description NC GND lNlT In -- ERROR out GND - NC SLCT IN In Not used. TWISTED-PAIR RETURN signal GND level. When the level of this signal becomes "LOW", the printer controller is reset to its initial state and the print buffer is cleared. This signal is normally at "HIGH" level, and its pulse width must be more than 56~s at the receiving terminal. The level of this signal becomes "LOW" when the printer is in 1. PAPER END state 2. OFF-LINE state 3. Error state Same as with Pin Nos. 19 to 30. Not used. Pulled up to +5V through 4.7KD resistance. Data entry to the printer is possible only when the level of this signal is "LOW". (Internal fixing can be carried out with DIP 1 SW 1-8. The condition at the time of shipment is set "LOW' for this signal.) N O T E S : 1. "Direction" refers to the direction of signal flow as viewed from the printer. 2. "Return" denotes "TWISTED PAIR RETURN" and is to be connected at signal ground level. As to the wiring for the interface, be sure to use a twisted-pair cable for each signal and never fail to complete connection on the Return side. To prevent noise effectively, these cables should be shielded and connected to the chassis of the host computer and the printer, respectively. 3. All interface conditions are based on TTL level. Both the rise and fall times of each signal must be less than 0.2 /.Ls. 4. Data transfer must not be carried out by ignoring the ACKNLG or BUSY signal. (Data transfer to this printer can be carried out only after confirming the ACKNLG signal or when the level of the BUSY signal is "LOW".) -30-

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
Table 5
(cont.)
Signal
Return
Pin No.
!
I
Pin No.
Signal
18
-
NC
9
to30
-
GND
-
31
-
lNlT
32
ERROR
33
-
GND
34
-
NC
35
36
-
SLCT
IN
-
I
--
Direction
In
out
-
In
1
Description
Not
used.
TWISTED-PAIR
RETURN
signal
GND
level.
When
the
level
of
this
signal
becomes
“LOW”,
the
printer
controller
is
reset
to
its
initial
state
and
the
print
buffer
is
cleared.
This
signal
is
normally
at
“HIGH”
level,
and
its
pulse
width
must
be
more
than
56~s
at
the
receiving
terminal.
The
level
of
this
signal
becomes
“LOW”
when
the
printer
is
in
-
1.
PAPER
END
state
2.
OFF-LINE
state
3.
Error
state
Same
as
with
Pin
Nos.
19
to
30.
Not
used.
Pulled
up
to
+5V
through
4.7KD
resistance.
Data
entry
to
the
printer
is
possible
only
when
the
level
of
this
signal
is
“LOW”.
(Internal
fixing
can
be
carried
out
with
DIP
SW
1-8.
The
condition
at
the
time
of
shipment
is
set
“LOW’
for
this
signal.)
NOTES:
1. “Direction” refers to the direction of signal flow as viewed from the
printer.
2. “Return” denotes “TWISTED PAIR RETURN” and is to be connected at
signal ground level.
As to the wiring for the interface, be sure to use a twisted-pair cable for
each signal and never fail to complete connection on the Return side.
To prevent noise effectively, these cables should be shielded and con-
nected to the chassis of the host computer and the printer, respec-
tively.
3. All interface conditions are based on TTL level. Both the rise and fall
times of each signal must be less than 0.2
/.Ls.
4. Data transfer must not be carried out by ignoring the ACKNLG or BUSY
signal. (Data transfer to this printer can be carried out only after con-
firming the ACKNLG signal or when the level of the BUSY signal is
“LOW”.)
-30-