Specifications; Figure 1-1. Nurse Call Interface Diagram - Welch Allyn 52000 Series Service Manual

Section 1
NOTE: See Nurse Call Interface in the Operator's Manual for complete information on
the Nurse Call interface.
The Welch Allyn Vital Signs Monitor provides a switch closure output between two pins of
the serial connector (pins 7 and 8). The output is universal in that it is compatible with a
wide variety of different systems with no polarity dependence. The Nurse Call output is
ohmically isolated from all circuitry.
The output is rated for 1 Amp at 240VAC or 30Vdc. During an alarm condition the output
is closed, otherwise the output is open. During a power off or power failure condition the
output is open.

Specifications

The performance specifications of the Vital Signs Monitor are as follows:
Patient Population
The Welch Allyn Vital Signs Monitor is designed for use with adult and pediatric patients.
Welch Allyn defines a pediatric patient as 29 days old and above. THE VITAL SIGNS
MONITOR IS NOT INTENDED FOR USE WITH NEONATES. Welch Allyn defines
neonates as children 28 days or less of age born at term (37 weeks gestation or more):
otherwise, up to 44 gestational weeks.
Cuff Pressure Range
0 mmHg - 300 mmHg
Initial Cuff Inflation
120, 140, 160, 180, 200, 240, 280 mmHg depending on pressure preset level. Pressure
preset default is 160 mmHg.
10 Welch Allyn Vital Signs Monitor
Vital Signs Monitor
1
6
2
7
3
8
4
9
5
RS-232 DB-9

Figure 1-1. Nurse call interface diagram.

General Information
RS-232 Cable
1
6
2
7
3
8
4
9
5
Nurse Call Contacts:
30Vdc @ 1 amp or
240Vac @ 1 amp Contact Wires
Monitor Service Manual 95P445E Rev. C
TX Data
RX Data
DTR
Ground
Nurse Call Common
Normally Open