PerkinElmer Photovac 2020, Manual

Page: 149 / 190

Troubleshooting
147
The pin assignments for all serial port signals are listed below.
Pin # Name I/O Parallel
to Serial
I/O Serial to
Paralle l
1 Frame
Ground
— —
2 TXD Out Out
3 RXD In In
6 DSR In —
7 GND — —
20 DTR — Out
Table 9 Serial to Parallel Converter Serial Port Signals
NOTE: A DB-25, female connector is sometimes a parallel port. Do not
connect the serial port of the converter to a parallel port.
Data Bit 7
Acknowledge
Busy
Paper End
Printer Select
Initialize
Select Input
Error
Auto Feed
Data Bit 6
Strobe
Data Bit 0
Data Bit 1
Data Bit 2
Data Bit 3
Data Bit 4
Data Bit 5
Figure 26 Serial to Parallel Converter Parallel Port
Signals