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107
Pin
Signal
Direction
No.
Name
7
SG
8 -19
N.C.
20
DTR
OUT
21 - 24
N.C.
25
INIT
IN
Interface Connections
Refer to the interface specifications of the host for details on connecting to its
interface connector. The following illustration shows a typical connection
configuration.
Printer side
(D-sub 25 pin)
F-GND
1
TXD
2
RXD
3
RTS
4
DSR
6
S-GND
7
20
DTR
25
INIT
Signal ground
Not connected
Indicates whether data receive from host is enabled or disabled.
DTR/DSR Communication Mode
Space when receive is enabled.
X-On/X-Off Communication Mode
Always space, except during following conditions:
• Period between reset and communication enabled
• During self-test printing and dot alignment adjustment
Not connected
• DIP Switch 10 = OFF
This signal not used.
• DIP Switch 10 = ON
This signal becomes reset signal. Printer is reset whenever signal is in mark state with
pulse width of 1mS or more.
Function
IBM PC side
25 pin
1
2
3
4
5
6
7
8
20
9 pin
F-GND
3
TXD
2
RXD
7
RTS
8
CTS
DSR
6
5
S-GND
1
DCD
4
DTR
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