SATO GL4xxe Series Operator's Manual page 24

SIGNAL
FGN
TxD
RxD
RTS
CTS
DSR
SGN
DTR
DB9
-- FGN (Frame Ground)
3 TxD (Transmit Data)
2 RxD (Receive Data)
6 DSR (Data Set Ready)
5 SGN (Signal Ground)
4 DTR (Data Terminal Ready)
8 CTS (Clear To Send)
7 RTS (Request To Send)
GL408-412e Operator's Manual
READY/BUSY INTERFACE SIGNALS
(Frame Ground)
(Transmit Data) - Data from the printer to the host computer. Sends X-On/X-Off characters or status
data (bi-directional protocols).
(Receive Data) - Data to the printer from the host computer.
(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 online) or an error condition occurrs during
printing (e.g., ribbon out, label out).
(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 when the line is low. If not being used, it is be tied high.
(Data Set Ready) - When this line is high, the printer will not receive data. This line must be high
before data is transmitted. If not being used, it is to be tied high.
(Signal Ground)
(Data Terminal 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 offline, 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
Unit 3: Installation
SIGNAL DEFINITION
DIRECTION DB9
Bi-Directional --
To Printer
To Host
To Printer
Bi-Directional
To Host
To Printer
To Host
3-9
PRINTER
FGN (Frame Ground)
2 RxD (Receive Data)
3 TxD (Transmit Data)
4 DTR (Data Terminal Ready)
5 SGN (Signal Ground)
6 DSR (Data Set Ready)
7 RTS (Request To Send)
8 CTS (Clear To Send)