Serial Interface

The serial interface is an option for your CQ-3500 printer. These pages tell you how to install and use the serial interface.

The GQ-3500 serial interface is actually two interfaces in one. It can be used as either an RS-232C interface (the factory setting) or an RS-422 interface, depending on the settings of the jumpers on the circuit board.

Setting up the Serial Interface

When you receive your serial interface, it is configured as an RS232C interface, 9600 baud, 8 data bits, no parity, 1 or 2 stop bits, with the printer ready protocol enabled. This configuration will work for many applications

To use this configuration with® PC computers, use the following command at the DOS prompt

MODE COM1:9600,N,8,1,P

If you need to change the configuration of the serial interface follow these steps:

1.Refer to your computer and software documentation to see what the requirements are for a serial interface printer.

2.Select the RS-232C or RS-422 interface. The jumpers at Jl and J2

will have to be reconfigured for RS-422. Because RS232C is the factory setting, the jumpers will not have to be reconfigured if you choose this interface. For information on the location of Jl and J2 and on how to reconfigure the jumpers for the specific settings described below, see the Serial Interface Jumpers section.

If you have changed the factory settings and want to reconfigure the lumpers for RS232C operation, set the jumpers at Jl and J2 as follows. At Jl, move REV, RD, and SRI to the left. At J2, all jumpers should be disconnected.

Serial Interface

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