Lexmark Printer manual Serial Interface

8-25

Interfaces

SLCTIN* Receiver for the Lexmark E230, E232, E330, E332n, and E234(n)

The following diagram illustrates the SLCTIN* receiver for the Lexmark E230, E232, E330, E332n, and E234(n).

+5V, 5%

	1.1K ohm ±10%
Connector	FCT 2827 or
Pin	FCT 2828
	56 ohm ±10%
	1720 pF ±20%
	GND

Serial Interface

The serial interface allows data to flow back and forth between the computer and the printer. However, the serial interface transfers data at a slower rate than the parallel interface.

If a serial connector is required, you may be able to install an RS-232C Serial Interface Card, an External Serial Adapter, or an RS-232C Serial/Parallel 1284-C Interface Card. Refer to your printer user documentation for more information.

The External Serial Adapter supports two serial interface standards: RS-232C and RS-422. The RS-422 serial interface provides more protection from electrical noise than RS-232.

Use RS-232C serial interface if the printer is more than 3.04 m (10 ft) from the computer but less than 15.24 m (50 ft) away. (You can also use a 6.1 m (20 ft) Lexmark cable to connect a printer and a computer located up to 20 feet apart.)

Use RS-422 if your computer is more than 15.24 m (50 ft) away from the printer. You may need to purchase an RS-422 adapter and software for your computer to run RS-422. Refer to your computer documentation for more information. You also need to purchase a custom cable for the serial interface, because serial RS-422 interface pinouts are usually unique to each computer.