IACS - Monitoring Applications VG2 Infinity M540 and M500 Technical Documentation Rev 4.0

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Technical Documentation IPM

IACS - Monitoring Applications - VG2

Infinity M540 / M500

Warning

All servicing and/or test procedures on the

device require detailed knowledge of this

documentation. Use of the device requires

detailed knowledge and observance of the

relevant Instructions for Use.

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Table of contents

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General

This chapter contains general notes and definitions that are important for the

use of this documentation.

General notes ...........................................................................................................................

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General

General notes

1

General notes

1.1

Notes on use

Read through the following notes thoroughly before applying this

documentation.

Dräger reserves the right to make changes to the device and/or to this

documentation without prior notice. This documentation is intended solely as

an information resource for maintenance personnel or technical specialists.

1.2

Copyright and other protected rights

The content of this documentation, in particular its design, text, software,

technical drawings, configurations, graphics, images, data and their selection

and its composition and any amendments to it (content) are protected by

copyright. The content must not (in whole or in part) be modified, copied,

distributed, reproduced, republished, displayed, transmitted or sold without

the prior written consent of Dräger.

1.3

Definitions

WARNING

An important advisory indicating a potentially hazardous situation

which may result in death or serious injury if not prevented.

CAUTION

An important advisory indicating a potentially hazardous situation which may

result in minor or moderate injury to the user or patient or in damage to the

medical product or other assets if not prevented.

NOTE

A NOTE provides additional information intended to avoid inconvenience

during operation and/or servicing.

Term

Maintenance

Maintaining the operative condition of a medical product

by suitable means

Inspection

Assessment of the actual condition of a medical product

Servicing

Maintaining the operative condition of a medical product

by recurrent, specified measures

Repair

Restoring the operative condition of a medical product

after failure of a device function

General safety precautions

Read through each section thoroughly before beginning servicing. Always

use the correct tools and the specified test equipment. Otherwise the device

may not work correctly or may be damaged.

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1.4

Definition

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General

General notes

WARNING

The device must be regularly inspected and serviced by maintenance

personnel. Repairs and complex maintenance work on the medical

product must be carried out by qualified specialists.

If you require a service contract, or for any necessary repair work,

Dräger recommends DrägerService. Dräger recommends using

original Dräger parts for servicing.

If the aforementioned instructions and recommendations are ignored,

the correct functioning of the medical product may be put at risk. Pay

attention to the "Servicing" section of the Instructions for Use.

WARNING

Non-conforming test values

If test values do not conform to specifications, the safety of the patient

may be put at risk.

–

Do not put the device into operation if test values do not conform to

specifications.

–

Contact your local service organization.

WARNING

Impermissible modifications to the device

If impermissible modifications are made to the device, the safety of the

patient may be put at risk.

Do not modify the device without Dräger's permission.

WARNING

Risk of infection

The unit may transmit pathogens following use on the patient.

–

Before carrying out any servicing, ensure that the device and its

components have been handed over by the user cleaned and

disinfected.

–

Service only cleaned and disinfected units and unit components.

WARNING

Risk to patient.

Ensure that no patient is connected to the device before starting

maintenance or repair work.

NOTE

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Where reference is made to legislation, regulations and standards, in

respect of devices used and serviced in Germany they are based on the

laws of Germany. Users and technicians in other countries must comply with

their national laws and/or international standards.

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General notes

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Function descriptions

This chapter contains descriptions of the device's technical functions.

MCable-Mainstream CO2 sensor M11.1 ..................................................................................

PS250 function .........................................................................................................................

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Function descriptions

MCable-Mainstream CO2 sensor M11.1

1

MCable-Mainstream CO2 sensor M11.1

1.1

Introduction

The MCable-Mainstream CO2 sensor M11.1 measures the CO2 content in

the respiratory gas. The following section describes the design and function

of the MCable-Mainstream CO2 sensor.

Design

667

1.2

Fig. 1

MCable-Mainstream CO2 sensor

Item

1.3

Designation

1

Connector

2

Test filter

3

CO2 sensor

Principle

The CO2 measurement is based on the principle that CO2 molecules absorb

light at a specific wavelength. Light at a wavelength of around 4.26 µm is

strongly absorbed by the CO2 molecule. Light at a wavelength of around

4.13 µm is virtually not absorbed.

Function

Beam path

10

The beams emitted from the light source (9) are reflected by a parabolic

reflector (8), travel through the cuvette (7), and reach a filter/reflector (5). The

filter/reflector allows light at a wavelength of 4.13 µm to pass through, but

reflects the other wavelengths. The light at a wavelength of 4.13 µm is

bundled by a parabolic reflector (3) and sent to a detector (2).

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Function descriptions

MCable-Mainstream CO2 sensor M11.1

The light reflected by the filter/reflector travels to a filter (10) which allows the

light at a wavelength of 4.26 µm to pass through. This light is bundled by a

parabolic reflector (11) and sent to a detector (12). The values measured by

the detectors are evaluated and used to calculate the CO2 value. The

electronics required to do so is located on two printed circuit boards (1 and

13).

668

The optical assembly, including filters and detectors, is mounted on a metal

block which is kept at a constant temperature of approx. 42 °C. The discs that

face the cuvette have small heaters (6) which prevent the discs from misting

up.

Fig. 2

Electronic assembly

Mode of operation of the CO2 sensor

A preamplifier and filter assembly amplifies the values measured by the

detectors. The A/D converter converts these measured values into digital

signals. The microcontroller then calculates the CO2 measured values, and

makes them available at the RS232 port.

The A/D converters also converts the measured values from the temperature

sensors as well as the supply voltages into digital signals. With the help of the

control circuit, the microcontroller uses these signals to control the heaters

and to monitor the system.

The calibration data of the detectors are stored in the EEPROM.

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The value of the test filter is stored in the CO2 sensor. Depending on the

cuvette used (disposable or reusable), a correction value is applied to the

CO2 measurement.

The supply voltage to the electronics is +5 V. The various internal voltages

required for operation are generated on the Mainboard PCB.

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Function descriptions

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MCable-Mainstream CO2 sensor M11.1

Fig. 3

Block diagram

Each CO2 sensor is fitted with a test filter. The value of the test filter is stored

in the CO2 sensor.

General information

As from Revision 05 Defibrillator the CO2 sensor is fixed. This is indicated on

the sensor.

1.5

Connections and interfaces

The CO2 sensor is attached by a connector to the medical product. This

connector carries the voltage supply and the communication (RS232).

898

Pin assignment

Connector (1 = rear view, solder terminals, 2 = front view, pins)

Pin

12

Assignment

1

TXD

2

Unassigned

3

Unassigned

4

+5 V

5

GND

6

RXD

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Fig. 4

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Function descriptions

MCable-Mainstream CO2 sensor M11.1

Pin

Cable shield

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Assignment

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Function descriptions

PS250 function

2

PS250 function

2.1

Introduction

The following text describes the structure, the functional principle, and the

connections of the PS250.

Design

2689

2.2

Fig. 5

Overview

Item

2.3

Designation

1

Power supply unit M7.3

2

Battery

3

IO Board PCB

4

Power Board PCB

Functional principle

The PS250 is a network distribution device with additional voltage supply.

The power supply unit provides a supply voltage of 24 V. In the event of a

mains power supply interruption, a battery bridges the outage time. The

bridging time is, amongst other things, dependent on the charge state of the

battery and the power consumption.

The IO Board has additional interfaces/ports, 2x Ethernet and 1x RS232. The

"Nurse call" connection can be used to connect to an external center for

nurse calls.

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The Power Board PCB provides two connections for the system cables.

These connections are used to communicate with and power other units,

such as Infinity C500 and Infinity M540.

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Function descriptions

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PS250 function

Block diagram

Fig. 7

Interfaces

Connections and ports

2691

2.4

Fig. 6

Key to Fig. 7

Item

Designation

Ethernet interface (Infinity LAN)

2

Ethernet interface (Infinity LAN)

3

Nurse call

4

RS232 interface

5

Mains voltage

6

System cable, connection to other units

7

System cable, connection to other units

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Function descriptions

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Function descriptions P2500

Infinity P2500 Function Description ..........................................................................................

Power supply unit .....................................................................................................................

"Ethernet board" .......................................................................................................................

"System board" .........................................................................................................................

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21

23

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2

3

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Function descriptions P2500

Infinity P2500 Function Description

1

Infinity P2500 Function Description

1.1

Introduction

The following text describes the design, the functional principle, and the

connections of the Infinity P2500 communications distributor.

1.2

Design

1032

Infinity P2500 is a communications distributor with an additional power

supply.

Fig. 8

Overview

Item

1.3

Designation

1

Housing with heat sink, battery mount and power fuse

2

2 batteries (lead-acid accumulator)

3

Power supply unit

4

"Ethernet board"

5

"System board"

6

Housing

Functional principle

The "System board" provides two connections for the system cables. These

connections are used to communicate with and power other units, such as

Infinity C500 and Infinity M540.

The two LEDs visible on the outside of the housing cover are also controlled

by the "System board". The "Power" LED lights up green as soon as mains

voltage is connected to the unit. The "Battery check" LED flashes

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The power supply unit supplies an output voltage of 28 V DC when

connected to the mains and 24 V DC in battery operation.

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Function descriptions P2500

Infinity P2500 Function Description

immediately after power-on and then goes out. If the battery voltage is less

than 19 V, or if errors occur when charging the battery, the "Battery check"

LED lights up orange.

1598

The "Ethernet board" provides additional interfaces. The "Nurse call"

connection can be used to connect to an external centre for nurse calls. The

RS232 interface can be used for data export. By way of the electrically

isolated Ethernet ports, connections can be made to the Infinity network.

Fig. 9

Connections and interfaces

1037

1.4

Block diagram

Fig. 10

Interfaces

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Item

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Designation

1

System cable connection

2

System cable connection

3

Mains voltage connection

4

Ethernet port (Infinity network)

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Function descriptions P2500

Infinity P2500 Function Description

Item

Designation

Ethernet port (Infinity network)

6

Nurse call port

7

RS232 port for export with Medibus protocol

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5

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Function descriptions P2500

Power supply unit

2

Power supply unit

2.1

Introduction

The following text describes the design, the functional principle, and the

connections of the power supply unit.

2.2

Design

1039

The power supply unit is a compact unit which must not be dismantled further.

The AC voltage input is protected by two encapsulated fuses. The DC voltage

output is available by way of two screw-type terminals.

Fig. 11

2.3

Overview

Functional principle

The power supply unit uses an AC/DC converter to convert the present AC

voltage into a DC voltage.

The AC voltage input range is 100 to 240 V at a frequency ranging from 47 to

63 Hz.

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The generated DC voltage when powered from the mains is a nominal 28 V,

and when battery powered a nominal 24 V. The power output for both system

connectors together is 250 W.

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Function descriptions P2500

Power supply unit

Connections and interfaces

1040

2.4

Fig. 12

Connections

Item

Designation

Mains power supply (100 - 240 V AC)

2

24 V DC voltage output

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Function descriptions P2500

"Ethernet board"

3

"Ethernet board"

3.1

Introduction

The following text describes the design, the functional principle, and the

connections of the "Ethernet board".

3.2

Design

1048

The "Ethernet board" is a printed circuit board with SMD components and

several plug-in connectors.

Fig. 13

3.3

"Ethernet board"

Functional principle

An Ethernet switch enables the devices to communicate over the Infinity

network. The Ethernet ports are electrically isolated.

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1050

An RS232 interface and the nurse call are looped through from the "System

board" to the connector ports.

Fig. 14

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Block diagram, "Ethernet board"

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Function descriptions P2500

"Ethernet board"

Connections and interfaces

1049

3.4

Fig. 15

Connections

Item

Designation

Ethernet port (Infinity network)

2

Earth connection to "System board"

3

Connections of the "System board"

4

Battery LED and mains power LED

5

Earth spring contact to housing

6

RS232 port for export with Medibus protocol

7

Nurse call port

8

Ethernet port (Infinity network)

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Function descriptions P2500

"System board"

4

"System board"

4.1

Introduction

The following text describes the design, the functional principle, and the

connections of the "System board".

4.2

Design

1043

The "System board" is a printed circuit board with 2 microcontrollers, 1

ambient temperature sensor, SMD components and several plug-in

connectors.

Fig. 16

4.3

Overview

Functional principle

The "System board" powers the devices on the Infinity workstation and

enables them to communicate.

The "System board" controls the two connected batteries (Fig. 17). Following

a full charge, the batteries are maintained at optimum charge with a trickle

charge. In the event of failure of the operating voltage, the batteries are

automatically activated as power sources. A connected sensor continuously

monitors the battery temperature.

Infinity devices are connected via the system connectors, and are able to

communicate bidirectionally.

The Ethernet port is electrically isolated and routed to a network "Switch" on

the "Ethernet board".

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The "Node-Controller" processes signals, e.g. the nurse call signal or status

signals from the voltage controller.

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