A-1
Appendix A
System Interface Description
There are two system interfaces:
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one serial interface with RS-232C or RS-422 support
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one Parallel Centronics interface.
The interfaces can be operated in three different modes:
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parallel interface active
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parallel interface active in shared mode with serial RS-232C
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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 possible only when
the interface buffer is completely empty of data.
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