Using The Nurse Call Interface; Nurse Call Feature - Nellcor OXIMAX N-600X Series Service Manual

Using the Nurse Call Interface

Nurse Call Feature

WARNING
Do not use the nurse call feature as the primary source of alarm notification. The
audible and visual alarms of the pulse oximeter, used in conjunction with clinical signs
and symptoms, are the primary sources for notifying medical personnel that an alarm
condition exists.
WARNING
The nurse call feature of the OxiMax N-600x pulse oximeter is operational when the
oximeter is powered by AC power or battery power. However, the nurse call feature
does not function when oximeter alarms are silenced.
The nurse call feature of the OxiMax N-600x pulse oximeter allows caregivers to
remotely monitor patient alarms and works in conjunction with the nurse call system
of your institution. Access this feature through data port pins 7, 8, 10, 11, or 15.
The oximeter provides two different types of nurse call interfaces: an RS-232 level
and relay closure. The RS-232 level nurse call function operates when the oximeter is
connected to AC power or on battery. The relay-based nurse call function is available
when the oximeter is operating either on AC power or on battery power.
When enabled, audible alarms signal the remote location. If the audible alarm has
been turned off or silenced, the nurse call function is also disabled.
Obtain the RS-232 Nurse Call signal (pins 5 and 11) by connecting to the data port. It
is in the form of a positive or negative voltage chosen by the user. See Data Port
Pinouts, page 80 for complete information.
Pin 11 on the data port is the RS-232 level nurse call signal and pin 5 or 10 is ground
(See Figure 38 on page 81). With no alarm condition, the voltage between pins 10
and 11 are -5 VDC to -12 VDC, or +5V DC to +12 VDC, depending on the option
chosen via the softkeys (either NORM+ or NORM-). With an audible alarm, the output
between pins 5 and 11 will reverse polarity.
Pins 7 and 15 provide a relay that closes when an alarm is sounding on the oximeter.
Pins 8 and 15 provide a relay that opens when an alarm is sounding. Pin 15 is
Service Manual
Figure 57. Data Port Pin Layout
10030881 Rev. B 12-2008
Using the Nurse Call Interface
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