Xerox 4520, Руководство пользователя

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C a b l e S p e c i f i c a t i o n s
A-10
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4 5 2 0 / 4 5 2 0 m p U s e r ’ s G u i d e
The RS-422A Serial Interface is hardware compatible with
the EIA RS-422 standard which defines the interconnect of
Data Terminal Equipment (DTE) and Data Communication
Equipment (DCE).
Data Rates
The user may select line speeds of 300, 600, 1200, 2400, 4800,
9600, 19200 and 38400 baud. Default setting is for 9600 baud .
Encoding
Asynchronous communication in the printers supports 7 or
8-bit ASCII data. The string of data bits is encapsulated by 1
Start bit, 1 or 2 Stop bits and may have an appended Parity
bit. Parity (even, odd or none), the number of stop bits and 7
or 8 bit data are selectable from the front panel UI. Default
settings are for 8 bit data with 1 stop bit and parity none .
Protocols
XON/XOFF provides the software handshaking on the
RS-422 interface. Robust XON/XOFF is the default .
Connections
The connector for the RS-422A interface is the 25 pin “D”
Shell type. The use of short cables for interconnect is
recommended. Cable length has been certified at 4 feet.
RS-422A Serial
Interface (CCITT
V.11 and X.27)
WUG-APPA Page 10 Black,Cyan Sunday, January 22, 1995 8:55 PM