Nellcor OXIMAX N-600X Series, Operator'S Manual

Page: 124 / 212

Using the Data Port
116 N-600x Operator’s Manual
Using the Nurse Call Interface
WARNING: The nurse call feature should not be used 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 is not functional whenever the
pulse oximeter alarms are silenced.The nurse call feature of the
N-600x monitor is operational when the monitor is powered by
AC power or battery power.
The nurse call feature of the N-600x works in conjunction with the
nurse call system of your institution when the monitor sounds an
audible alarm. It is accessed through the data port pins 7, 8, 10, 11, or
15 as indicated in Table 8.
The N-600x 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 monitor is connected to AC power or on battery.
The relay-based nurse call function is available when the monitor is
operating either on AC power or on battery power.
The remote location is signaled anytime there is an audible alarm. If
the audible alarm has been turned off or silenced, the nurse call
function is also turned off.
Pin 11 on the data port is the RS-232 level nurse call signal and pin 5
or 10 is ground (see Table 8). When there is no alarm condition, the
voltage between pins 10 and 11 is -5 to -12 VDC. Whenever the
monitor is in an alarm condition, the output between pins 10 and 11 is
+5 to +12 VDC.
Pins 7 and 15 provide a relay that closes when an alarm is sounding
on the monitor. Pins 8 and 15 provide a relay that opens when an
alarm is sounding. Pin 15 is a common lead for both relays.