Epson FX Series Product Support page 27

WIRING DATA
2.4 RX-80/100
Connector CN1 -RX-80/100
Use: This connector is used for data exchange between the RX Printer
and the host computer.
TABLE 2-17. PIN ASSIGNMENT OF CN1
Signal
Pin No.
Return
RnNa
Sional
Trans-
miner
Description
Paiallet
Interface
With these wo-
rtals, use twisted*
pair cable and
coonoct 'Return'
toLOQiCQNO.
Note; The sionals
which are ac-
live at "LOV/'
are indtcated
byabarabme.
1
19 Center
Machine
STROBE pulse for read-in of data Pulse width
must be more (tian 0 SmS at receiving terminal.
The signal level is normally "HIQH'; read-in of data
is performed at the 'LOW* level of this signal.
STROBE
2
3
4
5
6
7
8
9
20
21
2
23
24
25
26
27
OATAt
• 2
• 3
• 4
• 5
• 6
• 7
- 8
C«ntar
MKhIno
»
1
*
w
These signals represent information of the ist to
6th bits of parallel data respectively. Each signal is
at "KIQH' level wtten data is logical "V and 'LOW"
when logical '0".
to 28
Printer
"LOW signal indicates that data has been received
and that (he printer is ready to accept other
data Approx. 12m8 pulse.
<VCKNLG
11
29 ray?
(BUSY)
A "HIGH" signal indicates that the printer cannot
receive data
2-10
EPSON PRINTERS
TABLE 2-17 (cont.)
A LOW signal indicates that the printer can receive
data
The signal becomes "HIGH" in the following cases:
1 During data entry
2 During printing operation and part of head carrier
operation
3 Durmg part of paper feed
4 During printer error status
5 In OFF-LINE state
12 30
PE Printei
A 'HIGH' signal indicates that tfra printer is out of
paper
13
SLCT Printer
Pulled up to 1-SV through 3.3 kn resistance
14 AUTO
FEEDXT
Center
Machine
With this signal being at 'LOW level the paper is
automatically fed one line after pnnting.
IS
NC Not used.
16 GND LOGIC GND level.
17 FG
Printer FRAME GNO.
IB
NC Not used
19 -30 GND
TWISTED-PAIR RETURN signal GNO level.
31
WIT
Center
Machine
When the level of this signal becomes 'LOW, the
print buffer memory is creared. The pulse width
must be more than SOjiS at the receiving termi
nal.
32
Printer
The level of this signal becomes 'LOW wt«en the
printer is in the error status:
1. PAPER END state (cancelled by ESC9
2. Atxiomnal motor operation
3 OFF-UNE state
33
GNO Same as with Pin Nos. 19 to 30
34
NC Not used.
35
rSV Printer
Pulled up to -»-5V through a3kn resistance.
36
SLCTiN
Center
Machine
With this signal being at 'LOW level, the printer is
selected.