1000DF00329 Issue 4
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IrDA / RS232 / Nurse call Feature
The RS232 / Nurse call feature is an optional feature on Alaris®
Syringe Pumps. It allows the pump to be monitored remotely
and/or controlled via a suitable central monitoring or computer
system.
When the pump is started by a command from the serial interface,
communication must take place over the serial interface, a
communication must take place every 15 seconds or the pump
will alarm, display communications failure and stop infusing. This
failure protects against failure of the communications, including
the removal of the RS232 cable.
A
The nurse call interface provides a remote
backup to the internal audible alarm. It should
not be relied upon to replace monitoring of
the internal alarm.
Refer to the Technical Service Manual for
further information regarding the RS232
interface. Since it is possible to control the
syringe pump using the RS232 interface at
some distance from the pump and hence
remote from the patient, responsibility for the
control of the pump is vested in the software
run on the computer control system.
The assessment for the suitability of any
software used in the clinical environment to
control or receive data from the pump lies
with the user of the equipment. This software
should include detection of the disconnection
or other failure of the RS232 cable. The protocol
is detailed in the Technical Service Manual and
is for general information only.
Any connected analogue and digital
components are required to meet IEC/EN60950
for data processing and IEC/EN60601 for
medical devices. Anyone connecting additional
devices to the signal input or output is a system
configurator and responsible for meeting the
requirements of the system standard IEC/
EN60601-1-1.
Nurse call Specification -
Connector
D Type - 9 Pin
TXD/RXD
EIA
RS232-C Standard
TXD Output Voltage Range
Minimum: -5V (mark), +5V
(space)
Typical: -7V (mark), +7V (space)
with 3kΩ load to ground
RXD Input Voltage Range
-30V - +30V max.
RXD Input Thresholds
Low: 0.6V minimum / High: 3.0V
maximum
RXD Input Resistance
3kΩ minimum
Enable
Active, Low:-7V to -12V
Active, High:+7V to +12V,
powers up the isolated RS232
circuitry
Inactive: Floating/open circuit,
allows isolated RS232 circuitry
to power down.
Isolation Socket/Pump
1.5kV (dc, or ac peak)
Baud Rate
38.4 kBaud
Start Bits
1 Start Bit
Data Bits
8 Data Bits
Parity
No Parity
Stop Bits
1 stop bit
Nurse Call Relay Contacts
Pins 1, 8 + 9, 30V dc, 1A rating
Typical Connection Data -
1 Nurse call (Relay) Normally Closed (NC C)
2 Transmit Data (TXD) Output
3 Received Data (RXD) Input
4 Power Input (DSR)
5 Ground (GND)
6 Not used
7 Power Input (CTS)
8 Nurse call (Relay) Normally open (NC O)
9 Nurse call (Relay) Common (NC COM)
RS232 / Nurse call Connection Data
IrDA
Baud Rate
38.4 kBaud
Start Bits
1 Start Bit
Data Bits
8 Data Bits
Parity
No Parity
Stop Bits
1 stop bit
IrDA, RS232 and Nurse call Specification
