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Appendix A System Interface Description

There are two system interfaces:

S one serial interface with RS-232C or RS-422 support

S one Parallel Centronics interface.

The interfaces can be operated in three different modes:

S parallel interface active

S parallel interface active in shared mode with serial RS-232C

S parallel interface active in shared mode with serial RS-422

The following chapter gives an overview about interface characteristics, control

signals, protocols, and cabling.

Any change to the operation mode (PARALLEL, PARALL. / RS232, or

PARALL. / RS422) and to the size of the interface buffer is only possible when

the interface buffer is completely empty of data.

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