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RS-232
185
RS-232 And RS-422 Serial Interfaces
NOTE: The RS-232 and RS-422 serial interface circuit characteristics are
compatible with the Electronic Industry Association Specifications
EIA
®
-232-E and EIA-422-B.
The RS-232 and RS-422 serial interfaces enable the printer to operate with bit
serial devices that are compatible with an RS-232 controller. The input serial
data transfer rate (in baud) is selectable from the printer’s control panel. Baud
rates of 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200
baud rates are available.
NOTE: If you select a baud rate that is greater than 19200, you may need to
use RS-422 to prevent data loss. You may also need to increase the
Buffer Size in K parameter from the default (1 Kbyte), to improve
performance.
The length of the data cable from the host computer to the printer must not
exceed 50 feet (15 meters) for RS-232 or 4000 feet (1220 meters) for RS-422.
(A copper conductor, twisted-pair telephone cable with a shunt capacitance of
16 pF/foot [52.5 pF/meter] terminated in a 100 ohm resistive load must be
used for the RS-422.)
RS-232
Received Data (RD). Serial data stream to the printer.
Transmitted Data (TD). Serial data stream from the printer for transmitting
status and control information to the host. Subject to protocol selection.
Request To Send (RTS). Control signal from the printer. Subject to
configuration.
Clear To Send (CTS). Status signal to the printer indicating the host is ready
to receive data/status signals from the printer.
Data Set Ready (DSR). Status signal to the printer indicating the host is in a
ready condition.
Table 11. RS-232 Serial Interface Connector Pin Assignments
Input Signals Output Signals Miscellaneous
Signal Pin Signal Pin Signal Pin
Receive Data (RD) 3 Transmit Data (TD) 2 Chassis Ground 1
Clear To Send (CTS) 5 Request To Send
(RTS)
4 Signal Ground 7
Data Set Ready
(DSR)
6 Data Terminal Ready
(DTR)
20
Data Carrier Detect
(DCD)
8