Connections
Connecting the Printer to the Host
38
P1016701-001 Rev. B KR403 Hardware Integrator Guide 9/24/2010
Serial Communications
Refer to Figure 4-15. The required cable must have a nine-pin “D” type (DB-9P) male
connector on one end, which is plugged into the mating (DB-9S) serial port located on the
back of the printer . The other end of this signal interface cable connects to a serial port
at the host computer. Depending on the specific interface requirements, this will most
likely be a Null Modem (cross-over) cable.
The serial port communication settings between the printer and host (typically a PC) must
match for reliable communication. The Bits per second (data or Baud rate) and Flow
control are the most common settings that get changed. The host (typically a Windows
PC) needs to have the data rate and data Flow control changed to match the printer’s
default communication method:
• Bits per second - 115K is the printer’s default Baud Rate (Bits per second). The
printer and host can not communicate unless these match.
• Flow control - Software and is noted by the printer’s Host Handshake setting of
Xon/Xoff. The printer may communicate if these do not match, but it may not be
reliable.
• Data bits: 8 — Default (Windows and printer)
• Parity: None — Default (Windows and printer)
• Stop bits: Doesn’t care
Figure 4-15 • Serial Connection
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