Citizen CL-E321

99
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2. Network status indicator
Status LED (amber)
Connecting On
Disconnected Off
Exchanging data Flashes
Serial Interface
Interface Specications
Transfer method Start-stop synchronization method, full-duplex com-
munication
Signal level RS-232C
Baud rates 2400, 4800, 9600, 19200, 38400, 57600,
and 115200 bps
Data length 7 bits or 8 bits
Stop bits 1 bits or 2 bits
Parity Even, odd, or none
Interface 9-pin D-SUB female connector
Signal Line/Pin Assignment
Signal code Signal Pin No. Function
INIT Reset 1 Reset printer signal line
RXD Receive data 2 Signal line used by printer
to receive data from exter-
nal devices
TXD Transmit data 3 Signal line used by printer
to send data to external
devices
DTR Data terminal ready 4 Signal line used by printer
to notify external devices
that printer is ready to
communicate
SGND Signal line ground 5 Signal line ground refer-
ence
DSR Data set ready 6 Signal line used by
external devices to notify
printer that they are ready
to communicate
RTS Request to send 7 Signal line used by printer
to notify external devices
that the printer is read to
receive data
CTS Clear to send 8 Signal line used by
external devices to notify
printer that they are ready
to receive data
VCC +5 V 9 (Factory use only)