Service manual

Page 3-8
Section 3. Interface Specifications
SATO M-8485Se Standard Print Engine
Service Manual
PN 9001080
Rev. A
RS232C Interface Signals
Ready/Busy Flow Control
Ready/Busy is the hardware flow control for the serial interface on the M-8485Se printer.
By raising/lowering the voltage level on Pin 20 of the RS232 port, the printer notifies the
host when it is ready to receive data. Pin 4 (RTS) and pin 20 (DTR) are the important
signals on the printer for this method of flow control. The host must be capable of
supporting this flow control method for it to function properly.
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