Serial Interface - Lexmark Printer User Manual

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).
Connector
Pin

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.
+5V, 5%
1.1K ohm ±10%
56 ohm ±10%
1720 pF ±20%
GND
8-25
Interfaces
FCT 2827 or
FCT 2828