Nellcor OxiMax N-550 Service Manual page 103

Nurse Call Polarity Settings
Nurse Call Relay Pin States
Nurse Call Relay Rating
Real-Time Printout
N-550
Nurse Call Polarity
Normally High
Normally Low
Pin
7 N.O.
8 N.C.
Maximum input voltage
Load current
Minimum resistance
Ground reference
Electrical isolation
When a real-time printout is being transmitted, a new line of data is printed
every two seconds. Every 25
Alarm State
No alarm or Alarms Silenced
Audible Alarm
No alarm or Alarms Silenced
Audible Alarm
No Alarm or
Audible Alarm
Alarm Silenced
Open Closed
Closed Open
30 VAC or 30 VDC
12 mA continuous (peak 300 mA at 100 msec)
26.5 ohms to 50 ohms (40.5 ohms typical during
alarms
isolated ground
1,500 V
th
line will be a Column Heading line. A Column
Data Port Interface Protocol
Voltage at pins
10 to 11
5 to 12 VDC
-5 to -12 VDC
-5 to -12 VDC
5 to 12 VDC
N-550 Turned
Off
Closed
Open
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