C.ITOH 8510A User Manual page 35

Dot matrix serial impact printer
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,
,
(2) 20mA Current Loop - CD
Signals
Circuit
SD(+)
1+
(CER(+»
+5V •
¥Iv
0
-
DTR(+)
Output
SD(-)
[>0
(CER(-»
Signal •
0
DTR(-)
SN7406
+5V
liN
RD(+)
MCT2E
~
r-------,
---
DSR(+)
~
: £[
Input
+5V
I
7'
I
RD(-)
--4
I
I
Sl g
n.' ) ....-\ ,)
1
DSR(-)
.~ T
I
I
I
I
Output level
Input level
1+
20 rnA
lIN
20 rnA
~
~
r,7
m
-33-
L ___
___ J
~
7tr
(+) ---...,
I
I
I
I
(-) --"+-l
I
I
I
I
I
I
I
J
I
I
I
I
I
I
I
(+)
_-...1
I
I
I
I
I
I
( - ) - - - _
......

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