User`s guide

Note
All interface conditions are based on TTL level. Both the rise and fall of each
signal must be less than 0.2 microseconds.
Data transfer must be carried out by observing the ACKNLG or BUSY
signal. (Data transfer to this printer can be carried out only after the receipt
of the ACKNLG signal or when the level of the BUSY signal is LOW.)
The column heading “Direction” refers to the direction of the signal flow as
viewed from the printer.
“Return” denotes the twisted-pair return to be connected at signal ground
level. For the interface wiring, be sure to use a twisted-pair cable for each
signal and to complete the connection on the return side.
Serial interface
The DFX-5000+ built-in serial interface is an RS-232C asynchronous
interface with the following characteristics.
Data format: 1 start bit
Data word length: 8 bits
Odd, even, or no parity
1 or more stop bit
Signal level:
Mark logical “1” (-3 V to -27 V)
Space logical “0” (+3 V to +27 V)
Handshaking: Handshaking by DTR signal or Xon/Xoff.
Bit rate:
300, 12OO, 9600, 19200 bps
Connector plug:
EIA 25-pin connector
Technical Specifications A-13