SATO GT 410 Operator's Manual page 21

Unit 3: Installation
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 FG (Frame Ground)
2 3 RD (Receive Data)
3 2 TD Transmit Data)
8 5 CTS (Clear To Send)
4 20 DTR (Data Temrinal Ready)
6 6 DSR* (Data Set Ready)
5 7 SG (Signal Ground)
* 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.
SATO GT4xxe Series Operator Manual
RS232C SERIAL 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.
13
25
Figure 3-4, Serial Interface Pin Assignments
CABLE REQUIREMENTS
HOST CONNECTION
Bi-Directional
To Printer DB9-6
To Printer DB9-4
Bi-Directional
PN 9001138A
SIGNAL DEFINITION
DB9
1
To Host 2
To Printer 3
4
6
To Host 9
7
1
14
PRINTER
FG (Frame Ground)
TD (Transmit Data)
RD (Receive Data)
RTS (Request to Send)
DSR (Data Set Ready)
DTR (Data Terminal Ready)
SG (Signal Ground)
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