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C-1-3. Cable Connections
(1) The followings are a recommended interface cable connections.
Printer
Printer side
(D-sub 25 pin)
FG
1
TXD
2
RXD
3
RTS
4
DSR
6
7
SG
DTR
20
INIT
25
(2) If power is to be supplied from the interface connector, use wires with
sufficient length and thickness to prevent voltage drop.
C-1-4. Electrical Characteristics
Voltage
Data signal
-3V to -12V
+3V to +12V
FG
TXD
RXD
RTS
CTS
DSR
DTR
SG
Control signal
Mark
OFF
Space
ON
MAX211 or
equivalent
Rin
Tout
FG
TXD
RXD
RTS
CTS
DSR
DTR
SG
or
Host side
25 pin
1
2
3
4
5
6
7
8
20
Binary status
1
0
– 102 –
Host
9 pin
FG
3
TXD
2
RXD
7
RTS
8
CTS
DSR
6
5
SG
1
DCD
4
DTR
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