Lexmark c752 Guia De Referência

The following diagram illustrates the SLCTIN* receiver for the Lexmark C752.

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%

1.5K ohm ±10%

FCT 2827 or
FCT 2828

GND

1650 pF ±20%

Connector
Pin

56 ohm ±10%