Pin Assignments for Serial Interface Signals
Pin | Signal | Symbol | Direction |
|
|
|
|
1 | Protective Ground | PG |
|
2 | Transmitted Data | TD | From Printer |
3 | Received Data | RD | To Printer |
4 | Request to Send | RTS | From Printer |
5 | Not used |
|
|
6 | Data Set Ready | DSR | To Printer |
7 | Signal Ground | SG |
|
Not Used |
|
| |
11 | Supervisory Send Data | SSD | From Printer |
Not Used |
|
| |
20 | Data Terminal Ready | DTR | From Printer |
Not Used |
|
| |
|
|
|
|
ML720/721 Printer Handbook | 111 |