Printers have either a serial or parallel input. Most newer printers use parallel connections. A parallel printer will require a separate serial-to-parallel converter unit.

A null modem adapter or cable must be used when connecting a printer directly to the unit. The monitoring unit sends information out on pin 2 while a serial printer or serial-to-parallel converter receives information on pin 3. The null modem adapter reverses the transmit and receive pins by connecting pin 2 to pin 3 and pin 3 to pin 2,. (The null modem adapter is not required on a computer serial port which receives information on pin 2.)

A 9-25 pin adapter may also be required and is available at any computer or Radio Shack™ store.

Serial printers are available from only a few manufactures. Okidata Corporation carries at least 2 different models. Ask for Model 590 with serial option or Model 395 with serial option.

Set your printer to 9600 Baud, 8 Data Bits, 1 Stop Bit, No Parity. The unit sends both Carriage Return and Line Feed commands, so the printer should be set to No Automatic Line Feed.