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iDP-3420/3421/3423 User’s Manual
47 CITIZEN
10
1010
10.
..
.2
22
2C
CC
Co
oo
onn
nnnn
nne
ee
ec
cc
ct
tt
to
oo
or
rr
r'
''
's
s s
s P
PP
Pi
ii
in
n n
n C
CC
Co
oo
on
nn
nf
ff
fi
ii
ig
gg
gu
uu
ur
rr
ra
aa
at
tt
ti
ii
io
oo
on
nn
n
Mode
No.
CBM STAR ECS/POS
1FG
¬¬
2TXD
¬¬
3RXD
¬¬
4RTS
¬
5
6 DSR
7GND
¬¬
8
9
10
11 PE (HI-LEVEL) RCH
12 FAULT
13 GND
14 FAULT
15 mTXD
16 mRXD
17
18
19
20 DTR
¬¬
21
22
23 RESET
24
25
Cautions: 1. An RS-232C signal is based on the EIA RS-232C.
2. When the data is not being transferred, the received data should be always
maintained as a mark.