Figure 27 Connecting 2020 Using The Null Modem Cable - PerkinElmer Photovac 2020 Manual

Troubleshooting
Serial to Parallel Converter Troubleshooting on
page 144 for more details.
2. Ensure the cable being used is compatible with the
device.
A computer with a 9 pin serial connector will first
require a null modem to switch pins 2 and 3. Next a
gender changer that converts the male DB-25
connector on the printer cable from male 25 pins to
female 9 pins is required. These two adapters have
been combined into one, which is supplied in the 2020
cable kit. See Figure 27.
A computer with a 25-pin serial port should not require
a null modem but will require a gender changer. A
gender changer will convert the male DB-25 connector
on the printer cable to a female connector. A gender
changer is supplied with the 2020 printer kit. See Figure
28.
Computer with
9 Pin, Male,
Serial Port
2020
Null
Modem
2020
Printer Cable
Figure 27 Connecting 2020 Using the Null Modem Cable
The pin definitions of interest are listed in Table 10.
Only pins 2 and 3 are shown since these are the
problem pins:
Pin # 2020 9-pin 25-pin
149