Pin No. | Signal Name | Direction | Function |
|
|
|
|
20 | DTR | OUT | |
|
|
| Always space, except during following conditions: |
|
|
| • Period between reset and communication enabled |
|
|
| • During self printing and dot alignment adjustment |
|
|
|
|
21 - 24 | N.C. |
| Not connected |
|
|
|
|
25 | INIT | IN | • DIP Switch |
|
|
| This signal not used. |
|
|
|
|
|
|
| • DIP Switch |
|
|
| This signal becomes reset signal. Printer is reset whenever |
|
|
| signal is in space state with pulse width of 1mS or more. |
|
|
|
|
Note: DIP switch 2 displays the switches on the interface card.
13 | 1 |
25 | 14 |
B-2. Interface Connections (Serial Interface)
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 |
| IBM PC side |
|
25 pin | 9 pin |
| ||
1 | 1 |
| ||
TXD | 2 | 2 | 3 | TXD |
RXD | 3 | 3 | 2 | RXD |
RTS | 4 | 4 | 7 | RTS |
|
| 5 | 8 | CTS |
DSR | 6 | 6 | 6 | DSR |
7 | 7 | 5 | ||
DTR | 20 | 8 | 1 | DCD |
INIT | 25 | 20 | 4 | DTR |
APPENDIX
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