User guide

Data Ports
Serial Data Port
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57512L-004 Rev. A 110PAX4/R110PAX4 User Guide 6/29/11
Serial Data Port
To communicate using the serial data port of the print engine, you must choose the number of
data bits, parity, and handshaking. Parity applies only to data transmitted by the print engine
because the parity of received data is ignored.
The values selected must be the same as those used by the host equipment connected to the
print engine. Default print engine settings are 9600 baud, 8 data bits, no parity, and
XON/XOFF. The print engine will accept any host setting for stop bits.
Hardware Control Signal Descriptions
For all RS-232 input and output signals, the print engine follows both the Electronics
Industries Association (EIA) RS-232 and the Consultative Committee for International
Telegraph and Telephone (CCITT) V.24 standard signal level specifications.
When DTR/DSR handshaking is selected, the Data Terminal Ready (DTR) control signal
output from the print engine controls when the host computer may send data. DTR ACTIVE
(positive voltage) permits the host to send data. When the print engine places DTR in the
INACTIVE (negative voltage) state, the host must not send data.
Request To Send (RTS) is a control signal from the print engine that is connected to the Clear
To Send (CTS) input at the host computer.
Note • When XON/XOFF handshaking is selected, data flow is controlled by the ASCII
Control Codes DC1 (XON) and DC3 (XOFF). The DTR Control lead has no effect.