Data Port Communications - Nellcor OXIMAX N-600X Series Service Manual

Figure 38 illustrates the pin layouts as viewed from the rear panel. The conductive
shell connects to earth ground when connected to a PC or printer.
Note:
When the oximeter is turned off, the contact at pin 7 is closed and pin 8 is open.

Data Port Communications

Send data from the oximeter to a computer by using a data cable with a Null modem
connector or cross-type cable installed between the oximeter and the computer.
Select the ASCII comm protocol (see Communication Protocol, page 84). Data sent to
the computer is serial, eight (8) data bits, no parity, one (1) stop bit XON/XOFF flow
control and is space-delineated. After making the connection, real-time data flows to
the computer. Every two seconds, the oximeter sends a new line of data. See
Real-Time Output, page 88.
Holding the Ctrl-key on the computer keyboard and pressing "C" twice accesses an
interactive mode. Activating the interactive mode halts the real-time serial output,
while accepting serial input. The oximeter displays five options on the computer
screen while accepting serial input.
These options provide the caregiver or technician the opportunity to request
printouts and to adjust the oximeter date and time.
1. Dump Instrument Info—Prints or displays single line of oximeter data, including
the oximeter software version, CRC number, and total operating time. Information
useful to Nellcor's personnel.
2. Set Date and Time—When the oximeter ships from the factory, the date and
time are set to the local factory time zone. If battery removal or disconnection
occurs, the time clock will not reflect the actual date and time. After restoring
battery power, use this feature to change the date and time via the computer. The
format for date and time is DD-MM-YY HH:MM:SS. Move the cursor under the
value to be changed and enter the new value.
Service Manual
Figure 38. Data Port Pin Layout
10030881 Rev. B 12-2008
Data Port Connectivity
81