Signal Definition - SATO S8412 Operator's Manual

PIN DIRECTION
1 Reference
2 To Host
3 To Printer
4 To Host
5 To Printer
6 To Printer
7 Reference
20 To Host
DB9 DB25
1 1
2 3
3 2
8 5 CTS (Clear To Send)
4 20 DTR (Data Terminal Ready)
6 6 DSR* (Data Set Ready)
5 7
* This connection at the host side of the interface would depend upon the pin that is being used as the Ready/Busy signal by
the driving software. Typically, on a PC, it would be either CTS (pin5) or DSR (pin 6) on a DB-25 connector.
S8400 Series Operator Manual
READY/BUSY INTERFACE SIGNALS
FG (Frame Ground)
TD (Transmit Data) - Data from the printer to the host computer. Sends X-On/X-Off characters
or status data (bi-directional protocols).
RD (Receive Data) - Data to the printer from the host computer.
RTS (Request to Send) - Used with Ready/Busy flow control to indicate an error condition.
RTS is high and remains high unless the print head is open (in this case, RTS would return to
the high state after the print head is closed and the printer is placed back on-line) or an error
condition occurs during printing (e.g., ribbon out, label out).
CTS (Clear to Send) - When this line is high, the printer assumes that data is ready to be
transmitted. The printer will not receive data when this line is low. If this line is not being used,
it should be tied high (to pin 4).
DSR (Data Set Ready) - When this line is high, the printer will be ready to receive data. This
line must be high before data is transmitted. If this line is not being used, it should be tied high
(to pin 20).
SG (Signal Ground)
DTR (Data Terminally Ready) - This signal applies to Ready/Busy flow control. The printer is
ready to receive data when this pin is high. It goes low when the printer is off-line, either
manually or due to an error condition, and while printing in the single job buffer mode. It will
also go low when the data in the buffer reaches the buffer near full level.
READY/BUSY CABLE REQUIREMENTS
HOST
FG (Frame Ground)
RD (Receive Data)
TD (Transmit Data)
SG (Signal Ground)
Figure 3-8, Serial Connector Pin Assignments
Unit 3: Installation

SIGNAL DEFINITION

DIRECTION DB25
Bi-Directional
To Host
To Printer
To Printer DB9-6
To Printer DB9-4
To Host
Bi-Directional
3-11
PRINTER
1 FG (Frame Ground)
2 TD (Transmit Data)
3 RD (Receive Data)
4 RTS (Request To Send)
5 DSR (Data Set Ready)
6 DTR (Data Terminal Ready)
7 SG (Signal Ground)
PN: 9001160B