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SATO M-5900RV Operator and Technical Reference Manual
Page 5-4
Section 5. Interface Specifications
PN 9001081
Rev. C
The Receive Buffer
The receiving buffer will not be able to receive more data again until a "Buffer
Available" condition occurs. This takes place when the receiving buffer has
emptied so that only 56K bytes of data are being held (8K bytes from being
full). At this time DTR will go "high" or an X-On is sent to tell the host that it
can again receive data.
All printer error conditions (i.e., label out) will cause the printer to go busy
(DTR "low" or X-Off) until the problem is corrected and the printer is placed
on-line. The printer will also be busy if taken off-line from the front panel.
5.4 RS232C Serial Interface
General Specifications
Electrical Specifications
Asynchronous ASCII
Data Transmission Rate
Character Format
Connector
Cable
Signal Levels
Half-duplex communication
Ready/Busy Hardware Flow Control
Pin 20, DTR Control
Pin 4, TRS Error Condition
X-On/X-Off Software Flow Control
Bi-Directional Communication (ENQ/Response)
2400, 4800, 9600 and 19200 bps
1 Start Bit (fixed)
7 or 8 data bits (selectable)
Odd, Even or No Parity (selectable)
1 or 2 Stop bits (selectable)
DB-25S (Female)
DB-25P (Male), 50 ft.maximum length. For cable
configuration, refer to Cable Requirements appropriate to
the RS232C protocol chosen.
High = +5V to + 12V
Low = -5V to -12V