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6-4-2
Connector Signals and Functional Description for Parallel Interface
Pin
Signal Name
No.
1
STRoiiE
2
DATA 1
3
DATA 2
4
DATA
3
5
DATA 4
6
DATA
5
DATA
6
8
DATA 7
9
DATA 8
10
ACK
11
BUSY
12
PAPER END
13
SELECTED
14
(NC)
15
(NC)
16
SIGNAL GND
17
CHASSIS GND
18
+5V DC
19
TWISTED PAIR
RETURN (PIN
1)
20
TWISTED PAIR
RETURN (PIN 2)
21
TWISTED PAIR
RETURN (PIN 3)
22
TWISTED PAIR
RETURN (PIN
4)
23
TWISTED PAIR
RETURN (PIN 5)
24
TWISTED PAIR
RETURl' (PIl\ 6)
I/O Classi-
fication
IN
IN
IN
IN
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
Functional Description
Strobe pulse used for reading in data
(normally high) •
When this signal goes low, data is read.
Parallel signals from 1st bit to 8th bit
of data.
When data logic is "1", the signal level
is high; when "0", the signal level is low.
A signal with a pulse width of approx.
5
~sec,
generated after the data is received.
When this signal has been completed,
the next data acceptance is permitted.
A signal at DC level, which indicates
the operating condition of the printer.
When this signal level goes low, the next
data acceptance is permitted.
A signal at DC level which indicates when
a paper-out condition exists.
This signal tevel is normally low.
High indicates a paper-out condition.
When DIP switch pin No. 2-1 is "off", this
signal is held low.
A signal at DC level that goes high when
The printer is put in "on line" mode.
(unused)
( unused)
Signal ground
Ground of printer frame
OUT
External +5V DC power (Max.
SOmA)
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
-64-
Return lines of various signals.
Connect a twisted pair cable to
each of these pins and its
relevant signal pin.
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