Please see Section 5.1 for parallel port cabling information, Section
5.2for DB-25 serial port cabling information, or Section 5.3 for RJ-45 cabling. Appendix A provides recommended cabling pinouts.
Parallel ports on Print Master have DB-25 female connectors. A straight, DB-25 male-to-male cable is required between each IBM PC computer (or compatible) and a parallel port on Print Master. A DB-
25male-to-Centronics cable is required between each printer having a Centronics connector and Print Master (i.e., IBM PC to Centronics cable).
CAUTION: Some standard EIA-232 DB-25 cables may have pin 1 grounded to connector shell. Since Pin 1 is a strobe line in Centronics protocol, this ground must be removed if the cable is used between a PC and Print Master.
The pin layout for the DB-25 connector is similar to IBM PC parallel connector and uses the following signals:
| STANDARD TTL LEVELS | |
SIGNAL | DB-25 |
NAME | | PIN NO. |
- Strobe | 1 |
+ Data Bit 0 | 2 |
+ Data Bit 1 | 3 |
+ Data Bit 2 | 4 |
+ Data Bit 3 | 5 |
+ Data Bit 4 | 6 |
+ Data Bit 5 | 7 |
+ Data Bit 6 | 8 |
+ Data Bit 7 | 9 |
- Acknowledge | 10 |
+ Busy | 11 |
+ P. End (Out of Paper) | 12 |
+ Select | 13 |
- Auto Feed | 14 |
- Error | 15 |
- Initialize Printer | 16 |
- Select Input | 17 |
Ground | 18-25 |
