166
APPENDIX
4 DTR OUT 2) X-ON/X-OFF mode
Indicates whether or not the printer can receive data from the host.
This signal is a space, except in the following cases.
1. After reset until communication is possible
2. During test printing
6 DSR IN Signal line that indicates if the host computer can receive data.
SPACE: host can receive
MARK: host cannot receive
In the X-ON/X-OFF or Star mode, the status of this signal is not confirmed.
• The status of this signal is not confirmed.
This signal can be specified as an internal reset signal using of DIP Switch 7 (page 163).
MARK of 1ms or longer activates the reset.
7 SG — Signal ground
20 DTR OUT Same as RTS (Pin 4).
25 INIT IN This signal can be specified as an internal reset signal using of DIP Switch 8 (page 163).
SPACE of 1ms or longer activates the reset.
Pin
No. Signal
Name Direction Function
1
2
3
4
6
1
2
3
4
5
6
7
8
20
F-GND
TXD
RXD
RTS
DSR
20
25
7
S-GND
DTR
INIT
Printer side
(D-sub 25 pin) IBM PC side
3
2
7
8
6
5
1
4
F-GND
TXD
RXD
RTS
CTS
DSR
S-GND
DCD
DTR
9 pin25 pin