Mindray BeneView T8 Service Manual
BeneView T8
Patient Monitor
Service Manual
Intellectual Property Statement
SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called
Mindray) owns the intellectual property rights to this product and this manual. This manual
may refer to information protected by copyrights or patents and does not convey any license
under the patent rights of Mindray, nor the rights of others. Mindray does not assume any
liability arising out of any infringements of patents or other rights of third parties.
Mindray intends to maintain the contents of this manual as confidential information.
Disclosure of the information in this manual in any manner whatsoever without the written
permission of Mindray is strictly forbidden. Release, amendment, reproduction, distribution,
rent, adaption and translation of this manual in any manner whatsoever without the written
permission of Mindray is strictly forbidden.
, and are the registered trademarks or trademarks owned
by Mindray in China and other countries. All other trademarks that appear in this manual are
used only for editorial purposes without the intention of improperly using them. They are the
property of their respective owners.
Contents of this manual are subject to changes without prior notice.
I
FOR YOUR NOTES
II
Preface
Manual Purpose
This manual provides detailed information about the assembling, dissembling, testing and
troubleshooting of the equipment to support effective troubleshooting and repair. It is not
intended to be a comprehensive, in-depth explanation of the product architecture or technical
implementation. Observance of the manual is a prerequisite for proper equipment
maintenance and prevents equipment damage and personnel injury.
This manual is based on the maximum configuration; Therefore, some contents may not
apply to your monitor. If you have any question, please contact our Customer Service
Department.
Intended Audience
This manual is for biomedical engineers, authorized technicians or service representatives
responsible for troubleshooting, repairing and maintaining the patient monitors.
Revision History
This manual has a revision number. This revision number changes whenever the manual is
updated due to software or technical specification change. Contents of this manual are subject
to change without prior notice.
Revision number: 1.0
Release time: October 2006
© 2006 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. All rights reserved.
III
Abbreviations
Abbreviations used in this manual are:
MPM multi-parameter module
SMR satellite module rack
CMS central monitoring system
PCB printed circuit board
Passwords
A password may be required to access different modes within the monitor. The passwords are
listed below:
User maintenance: 888888
Factory maintenance: 332888
Demo mode: 2088
IV
Contents
Contents
1 Safety................................................................................................................................. 1-1
1.1 Safety Information ..........................................................................................................1-1
1.1.1 DANGER ........................................................................................................... 1-2
1.1.2 Warnings............................................................................................................. 1-2
1.1.3 Cautions ............................................................................................................. 1-2
1.1.4 Notes .................................................................................................................. 1-3
1.2 Equipment Symbols ........................................................................................................ 1-3
2 Theory of Operation ........................................................................................................ 2-1
2.1 Introduction..................................................................................................................... 2-1
2.2 System Connections........................................................................................................ 2-2
2.2.1 Mounting the Patient Monitor............................................................................ 2-2
2.2.2 Connectors for Peripheral Devices..................................................................... 2-3
2.3 Main Unit ........................................................................................................................ 2-4
2.3.1 Input System ...................................................................................................... 2-5
2.3.2 Output System.................................................................................................... 2-6
2.3.3 Processing and Communications System........................................................... 2-7
2.3.4 Power Management System............................................................................... 2-9
2.3.5 Equipment Interface System ............................................................................ 2-12
2.4 Parameter Module ......................................................................................................... 2-14
2.4.1 Module Communication Board........................................................................ 2-14
2.4.2 Module Power Board ....................................................................................... 2-14
2.4.3 Parameter Board............................................................................................... 2-14
2.5 Satellite Module Rack................................................................................................... 2-15
3 Testing and Maintenance................................................................................................. 3-1
3.1 Introduction..................................................................................................................... 3-1
3.1.1 Test Report ......................................................................................................... 3-2
3.1.2 Recommended Frequency.................................................................................. 3-2
3.2 Visual Test....................................................................................................................... 3-3
3.3 Power On Test ................................................................................................................. 3-4
3.4 Module Performance Tests .............................................................................................. 3-4
3.4.1 Mainstream CO
3.4.2 Sidestream and Microstream CO
3.4.3 ECG Tests........................................................................................................... 3-6
3.4.4 Resp Performance Test....................................................................................... 3-7
3.4.5 NIBP Tests.......................................................................................................... 3-8
3.4.6 IBP Tests............................................................................................................3-11
Tests........................................................................................ 3-4
2
Module Test ................................................. 3-5
2
1
Contents
3.4.7 SpO2 Test.......................................................................................................... 3-13
3.4.8 C.O. Test........................................................................................................... 3-13
3.4.9 Temp Test......................................................................................................... 3-13
3.4.10 BIS Test.......................................................................................................... 3-14
3.4.11 RM Test .......................................................................................................... 3-14
3.4.12 ICG Test ......................................................................................................... 3-15
3.4.13 AG Tests......................................................................................................... 3-15
3.5 Nurse Call Relay Performance Test .............................................................................. 3-18
3.6 Analog Output Performance Test .................................................................................. 3-18
3.7 Electrical Safety Tests ................................................................................................... 3-19
3.7.1 Enclosure Leakage Current Test....................................................................... 3-20
3.7.2 Earth Leakage Current Test.............................................................................. 3-20
3.7.3 Patient Leakage Current Test ........................................................................... 3-21
3.7.4 Patient Auxiliary Leakage Current Test ........................................................... 3-21
3.8 Touchscreen Calibration................................................................................................ 3-22
3.9 Recorder Check............................................................................................................. 3-22
3.10 Factory Maintenance................................................................................................... 3-23
3.10.1 Accessing Factory Maintenance Menu........................................................... 3-23
3.10.2 Drawing Waves .............................................................................................. 3-23
3.10.3 Recorder ......................................................................................................... 3-23
3.10.4 Software Version ............................................................................................ 3-24
3.10.5 Monitor Information....................................................................................... 3-24
3.10.6 Calibrate NIBP............................................................................................... 3-24
3.11 Program Upgrade ........................................................................................................ 3-25
4 Troubleshooting................................................................................................................ 4-1
4.1 Introduction..................................................................................................................... 4-1
4.2 Part Replacement ............................................................................................................4-1
4.3 Patient Monitor Status Check.......................................................................................... 4-1
4.4 Software Version Check .................................................................................................. 4-2
4.5 Technical Alarm Check ................................................................................................... 4-2
4.6 Troubleshooting Guide.................................................................................................... 4-2
4.6.1 Power On/Off Failures ....................................................................................... 4-2
4.6.2 Display Failures ................................................................................................. 4-3
4.6.3 Module Rack Failures ........................................................................................ 4-4
4.6.4 Alarm Problems.................................................................................................. 4-6
4.6.5 Button and Knob Failures .................................................................................. 4-7
4.6.6 Recorder Failures ............................................................................................... 4-7
4.6.7 Interface Failures................................................................................................ 4-8
4.6.8 CF Card Problems.............................................................................................. 4-9
4.6.9 Power Supply Failures ....................................................................................... 4-9
4.6.10 Network Related Problems..............................................................................4-11
4.6.11 Software Upgrade Problems........................................................................... 4-12
2
Contents
5 Repair and Disassembly ..................................................................................................5-1
5.1 Tools................................................................................................................................ 5-1
5.2 Preparations for Disassembly.......................................................................................... 5-1
5.3 Basic Disassembly .......................................................................................................... 5-2
5.3.1 Disconnecting the Base ...................................................................................... 5-2
5.3.2 Separating the Front and Rear Half of the Monitor............................................ 5-4
5.4 Further Disassembly........................................................................................................ 5-6
5.4.1 Removing the Power Switch & LED Board ...................................................... 5-6
5.4.2 Disconnecting the Knob Encoder....................................................................... 5-7
5.4.3 Removing the Button Board............................................................................... 5-7
5.4.4 Removing the LCD Assembly............................................................................ 5-8
5.4.5 Removing the Alarm Lamp Board ....................................................................5-11
5.4.6 Removing the Main Board ............................................................................... 5-12
5.4.7 Removing the CF/WLAN Assembly................................................................ 5-13
5.4.8 Removing the Fan ............................................................................................ 5-15
5.4.9 Removing the Speaker ..................................................................................... 5-15
5.4.10 Removing the Interface Board Assembly....................................................... 5-16
5.4.11 Removing the Power Supply Assembly ......................................................... 5-17
5.4.12 Removing the Integral Module Rack ............................................................. 5-20
5.4.13 Removing the Recorder.................................................................................. 5-23
5.5 Removing the SMR Assembly ...................................................................................... 5-29
5.6 Disassembling Modules ................................................................................................ 5-33
5.6.1 Disassembling the ICG Module ....................................................................... 5-33
5.6.2 Disassembling CO
Module ............................................................................. 5-36
2
6 Parts .................................................................................................................................. 6-1
6.1 Introduction..................................................................................................................... 6-1
6.2 Main Unit ........................................................................................................................ 6-2
6.2.1 Exploded View ................................................................................................... 6-2
6.2.2 Parts List ............................................................................................................ 6-2
6.3 Base Assembly ................................................................................................................ 6-3
6.3.1 Exploded View ................................................................................................... 6-3
6.3.2 Parts List ............................................................................................................ 6-3
6.4 Front housing Assembly.................................................................................................. 6-4
6.4.1 17” LCD with Anti-glare Screen ........................................................................ 6-4
6.4.2 17” LCD Touchscreen........................................................................................ 6-6
6.5 Rear Housing Assembly.................................................................................................. 6-8
6.5.1 Rear Housing Assembly..................................................................................... 6-8
6.5.2 Power module..................................................................................................... 6-9
6.5.3 Integral Module Rack....................................................................................... 6-10
6.5.4 Interface Board Assembly .................................................................................6-11
6.5.5 Main Support Assembly................................................................................... 6-12
6.5.6 Others ............................................................................................................... 6-13
6.6 SMR Assembly ............................................................................................................. 6-14
3
Contents
6.6.1 SMR Assembly................................................................................................. 6-14
6.6.2 SMR Inside Assembly...................................................................................... 6-15
6.7 Parameter Modules........................................................................................................ 6-17
6.7.1 MPM Module................................................................................................... 6-17
6.7.2 C.O. Module..................................................................................................... 6-18
6.7.3 RM Module ...................................................................................................... 6-20
6.7.4 ICG Module ..................................................................................................... 6-21
6.7.5 AG Module....................................................................................................... 6-23
6.7.6 BIS Module ...................................................................................................... 6-24
6.7.7 IBP Module ...................................................................................................... 6-25
6.7.8 Mindray CO2 Module ...................................................................................... 6-27
6.7.9 Oridion CO2 Module ....................................................................................... 6-28
6.8 Replaceable Parts .......................................................................................................... 6-29
6.8.1 Main Unit ......................................................................................................... 6-29
6.8.2 SMR ................................................................................................................. 6-31
6.8.3 Parameter Modules........................................................................................... 6-31
6.8.4 Cables............................................................................................................... 6-32
4
1 Safety
1.1 Safety Information
DANGER
z Indicates an imminent hazard that, if not avoided, will result in death or serious
injury.
WARNING
z Indicates a potential hazard or unsafe practice that, if not avoided, could result in
death or serious injury.
CAUTION
z Indicates a potential hazard or unsafe practice that, if not avoided, could result in
minor personal injury or product/property damage.
NOTE
z Provides application tips or other useful information to ensure that you get the
most from your product.
1-1
Safety
1.1.1 DANGER
There are no dangers that refer to the product in general. Specific “Danger” statements may
be given in the respective sections of this manual.
1.1.2 Warnings
WARNING
z All installation operations, expansions, changes, modifications and repairs of this
product are conducted by Mindray authorized personnel.
z There is high voltage inside the equipment. Never disassemble the equipment
before it is disconnected from the AC power source.
z When you disassemble/reassemble a parameter module, a patient leakage current
test must be performed before it is used again for monitoring.
z The equipment must be connected to a properly installed power outlet with
protective earth contacts only. If the installation does not provide for a protective
earth conductor, disconnect it from the power line and operate it on battery power,
if possible.
z Dispose of the package material, observing the applicable waste control regulations
and keeping it out of children’s reach.
1.1.3 Cautions
CAUTION
z Make sure that no electromagnetic radiation interferes with the performance of the
equipment when preparing to carry out performance tests. Mobile phone, X-ray
equipment or MRI devices are a possible source of interference as they may emit
higher levels of electromagnetic radiation.
z Before connecting the equipment to the power line, check that the voltage and
frequency ratings of the power line are the same as those indicated on the
equipment’s label or in this manual.
z Protect the equipment from damage caused by drop, impact, strong vibration or
other mechanical force during servicing.
1-2
Safety
1.1.4 Notes
NOTE
z Refer to Operation Manual for detailed operation and other information.
1.2 Equipment Symbols
Attention: Consult
accompanying documents
(this manual).
CIS connector
Danger: High-voltage
Alternating current(AC)
Power ON/OFF
Battery indication
Zero key
Calibrate key
Measure/Standby
Check sensor
ESD warning symbol for Electrostatic sensitive devices.
Network connector
Defibrillator connector
Connector for satellite
module rack
Video output
Auxiliary output connector
USB connector
Equipotential terminal
CE marking
Type CF applied part. Defibrillator-proof protection against electric shock.
Type BF applied part. Defibrillator-proof protection against electric shock.
1-3
FOR YOUR NOTES
Safety
1-4
2 Theory of Operation
2.1 Introduction
This patient monitor is designed to monitor a fixed set of physiological parameters including
ECG, heart rate (HR), respiration (Resp), temperature (Temp), SpO
non-invasive blood pressure (NIBP), invasive blood pressure (IBP), cardiac output (C.O.),
carbon dioxide (CO
bispectral index (BIS) and respiration mechanics (RM) of single adult, pediatric and neonatal
patients.
), oxygen (O2), anesthetic gas (AG), impedance cardiograph (ICG),
2
, pulse rate (PR),
2
The patient monitor also:
Provides audible and visual alarm indications in case of patient or equipment problems.
Enables displaying, reviewing, storing and transferring of real-time data.
Incorporates multiple input devices such as buttons, knob, touchscreen, keyboard and
mouse.
Interfaces a clinical information system or central monitoring system.
Enables program upgrade over the network.
2-1
Theory of Operation
2.2 System Connections
2.2.1 Mounting the Patient Monitor
The patient monitor can be mounted on a wall bracket or on a trolley support. The wall
bracket or trolley support can be ordered optionally. Each type of mounting bracket is
delivered with a complete set of mounting hardware and instructions. Refer to the
documentation delivered with the mounting hardware for instructions on assembling mounts.
CAUTION
z Use mounting brackets we supply or approve. If other compatible mounting
bracket is used, be sure it can be safely used on the patient monitor.
z The mounting bracket should be installed by our qualified service personnel, or
engineers who have adequate knowledge on it.
z If other mounting solution is used, the installation personnel and the customer
should verify if it can be safely used on the patient monitor, and the customer
assume the responsibility for any risk resulting from that.
2-2
Theory of Operation
2.2.2 Connectors for Peripheral Devices
On the back of the patient monitor you will find all connectors for peripheral devices.
2
3
4
1. AC Power Connector: used to connect an AC power source (100 to 240 VAC, 50/60Hz).
2. Equipotential Terminal: used to connect the equipotential terminal of other equipment,
eliminating potential difference between different pieces of equipment.
3. SMR Connector: It outputs a 12V DC, used to connect the SMR.
5678
1
10
9
4. Video Output: It is a DVI-D connector used to connect a secondary display.
5. CIS Connector: It is a RJ45 connector used to connect a CIS.
6. Network Connector: It is a RJ45 connector used to connect an ethernet network or a PC.
7. Defibrillator Connector: It is a RJ11 connector used to connect a defibrillator.
8. Auxi Output Connector: It is a BNC connector used to output analog signals and nurse
call signals.
9. Secondary USB Connector: used to connect the mouse and keyboard of the secondary
display.
10. General USB Connector: used to connect any USB-compatible peripheral device.
2-3
Theory of Operation
2.3 Main Unit
The patient monitor consists of:
Input system: button board, knob, touchscreen, power switch and LED board
Output system: LCD panel, alarm LED board, recorder, speaker
Processing and communications system: main board, CIS assembly, integral module
rack
Power management system: battery, battery interface board, power module
Equipment interface system: USB interface board, DVI interface board and CF/WLAN
assembly.
Additionally, the patient monitor can also connect a satellite module rack (SMR), parameter
modules, mouse, keyboard, etc.
The following diagram illustrates the structure of the patient monitor.
2-4
Theory of Operation
2.3.1 Input System
Button board
The button board, located at the lower part of the monitor’s front panel, contains 6 keys and
provides connections for the following components to the main board:
Knob
Power switch & LED board
Touchscreen control board
Backlight board
Alarm LED board
The following diagram shows the button board connections.
Knob
The knob can be pressed, or rotated both clockwise and counter-clockwise. It is connected
with the button board.
Touchscreen
The touchscreen enables touch operations and can be calibrated. It is connected with the
touchscreen control board and main board.
Power switch & LED Board
The power switch & LED board controls the power supply for the main unit. It has three
LEDs, which respectively indicate the AC power status, battery status and monitor power
on/off status. It is connected with the button board.
2-5
Theory of Operation
2.3.2 Output System
LCD panel
The patient monitor adopts a high-resolution LCD panel. The LCD panel is connected with
the backlight board and the main board. It runs on power from a DC source, which originally
comes from the main board, and then goes to the backlight board through the button board,
and finally is delivered to the LCD panel by the backlight board.
Alarm Lamp
The patient monitor has two alarm lamps: physiological alarm lamp and technical alarm lamp.
The alarm LED board converts electric signals into visual signals and then sends the visual
signals to the front panel through the light guiding post. Physiological alarm lamp lights
either red or yellow whereas technical alarm lamp lights blue only.
Recorder
The recorder receives data coming form the main board and then sends them to the thermal
printhead for printing. The recorder has a hardkey (starting/stopping recordings) and a green
LED on its front. It is connected with the main board.
The following diagram shows its operating principle.
2-6
Theory of Operation
Module Description
Power interface Introduces a DC from the main board.
Power module
CPU Control the communications between modules.
Signal interfac
Motor drive circuit
Button board &
indicator interface
FPC interface
Converts the input power into voltages that fit each module and then
forwards them to each module.
Control the communications between the main board and the
recorder CPU.
Receives the control signals from the CPU and then forwards them to
the step engine.s
Sends key commands to the CPU and receive commands controlling
the indicators from the CPU.
Sends the thermal printhead information to the CPU and receives the
commands controlling the thermal printhead from the CPU.
Speaker
The speaker provides sound for alarms, key strokes, heart beats and pulse, and allows PITCH
TONE and multi-level tone modulation. It is connected with the main board and runs power
from a DC provided by the main board.
2.3.3 Processing and Communications System
Main Board
The main board is the heart of the patient monitor. It implements a series of tasks including
input & output control, data storage and processing, display processing, system control,
communication management, printing management and alarming, etc.
The main board comprises the CPU board and mother board. The following diagram shows
interfaces to other components.
2-7
Theory of Operation
The CPU board is an essential CPU system containing the CPU, FLASH, memory, realtime
clock, EEPROM, etc. It interfaces to the mother board only, which then provides interfaces to
all other external devices.
The mother board is in charge of connections and communications with other components
and provides the following interfaces:
LCD port: connects a built-in display.
Video output+network+ GPIO: connects the digital video interface board.
USB×2+RS422: connects the USB interface board.
Button board port: connects the button board.
Integral module rack port: connects integral module rack communication board.
Fan port: connects the fan.
Speaker port: connects the speaker.
Power module port: connects the power module.
CIS port: located at the back of the mother board for connecting the CIS components.
WLAN&CF port: connects the CF/ WLAN assembly.
Recorder port: connects the recorder.
2-8
Theory of Operation
Integral Module Rack
The patient monitor has two kinds of integral module rack: 2-slot and 5-slot. The integral
module rack consists of control board and communication board.
The control board is a NIOS II module located on the communication board. It implements
protocol conversion and infrared communication between the main unit and the parameter
modules.
The communication board can be a MPM type (2-slot type) or a 3-slot type. It consists of
infrared circuit, RS422 communication circuit and power circuit. The communication board
is connected with the main board.
Operating principle of the communication board is as follows:
The infrared circuit transmits and receives infrared signals, and controls signal intensity;
RS422 communication circuit implements signal conversion between serial signals and
RS422 signals;
Power circuit transfers 3.3VDC power supply to run the integral module rack and
12VDC power supply to run the parameter modules from the mother board.
2.3.4 Power Management System
Battery
The patient monitor uses two chargeable lithium-ion batteries (11.1 V, 4500 mAh). The
battery compartment door is located at the bottom of the patient monitor. The battery power
is introduced to the power module via the battery interface board, and then processed and
distributed to each component by the power module.
NOTE
z Two batteries must be used simultaneously when the patient monitor operates on
battery power. Otherwise, it may cause power supply protection.
Battery Interface Board
The battery interface board connects batteries to the power module, enabling charging and
discharging between the batteries and the power board.
2-9
Theory of Operation
Power Module
The power module is located at the back of the patient monitor. The main part of the power
module is the power board, which contains 4 PCBs: charging & power management board,
voltage drop DC inverter, voltage rise and drop DC inverter, and voltage drop 5 V CIS power
board.
The power module transforms the input power into DC and then forwards them to each
component of the patient monitor. The input power comes from either the batteries or an AC
source. The patient monitor will run power from the AC source whenever an AC source is
available. If the AC source becomes unavailable, the patient monitor will automatically
switch to the battery power. This does not affect the monitor’s operating status.
Power module has an AC input socket at its backside, and a socket at its front provides 4
connections to the batteries, main board, CIS components and USB interface board
respectively. The power module protects itself and the patient monitor by switching off AC
input or DC output in case of overcurrent, short circuit and overvoltage.The power module
provides 4 DC outputs:
Outputs Description
+3.3 V
+5.0 V
+5.0 V CIS Goes to the CIS assembly.
+12 V
The systematic principle diagram of the power module is as follows:
Goes to the mother board, CPU board, DVI interface board and integral
module rack.
Goes to the DVI interface board, recorder, CF storage card board and
USB interface board.
Goes to the recorder, LCD panel, integral module rack, parameter
modules and USB interface board.
2-10
Theory of Operation
The following diagram shows the pins of the power module socket (excluding the pins of the
battery power socket. On power board, pin 1 has a triangle symbol):
Pin ID Marking Description Cable
color
2, 4, 6, 7,
13, 15, 17
8 RXD Receives serial communications (the main board sends). Purple
9 TXD Sends serial communications (the main board receives). Brown
10 PCON
11 LCD-EN
12, 1 12 V
14, 3 5 V CIS
GND The output grounding terminal of the power board. Black
Power on/off control signal. It is a TTL pulse signal
inputted from the back board. Every time when the power
on/off switch is pressed (pulse of falling edge), a switch
between power “on” and “off” happens. The pulse
duration is no less than 0.1 s for power-on and no less
than 2 s for power off.
Backlight on/off control signal. The main board sends a
backlight on/off control signal to the power board through
the serial interface. The power board processes the
received signal and then outputs a high or low level
depending on the received signal.
The positive end of the 12 V DC coming from the power
board.
The positive end of the 5 V CIS coming from the power
board.
Blue
Green
Yellow
Purple
16, 5 5 V
18, 19 3.3 V
20 LED- AC AC power status indication signal White
21 LED- BAT Battery status indication signal. Grey
22 LCD-BR Backlight brightness control voltage. Brown
The positive end of the 5 V DC coming from the power
board.
The positive end of the 3.3 V DC coming from the power
board.
2-11
Red
Orange
Theory of Operation
2.3.5 Equipment Interface System
USB Interface Board
The USB interface board is compatible with such USB interfaces as USB2.0, USB1.1 and
USB1.0. It is connected with the main board and the power module. It receives 2 USB
differential signals coming from the main board and then distributes them to 10 USB
interfaces via 2 ISP1521 chips. Moreover, it provides RS232 and RS422 interfaces for
communication between the main board and the SMR. The USB interface board receives 5
VDC and 12 VDC inputs from the power module, of which the 5 VDC goes to the USB
interface board and the 12 VDC outputted to the SMR connector through a fuse.
2-12
Theory of Operation
DVI Interface Board
The DVI interface board is connected with the mother board and the CIS mother board. The
following diagram shows its interfaces to other components.
Interface Description
CIS Connector Connects the CIS mother board.
BNC connector Outputs analog signals and nurse call signals.
RJ 11 connector Outputs defibrillator synchronization signals.
RJ 45 connector
(network)
RJ 45 connector
(CIS)
DVI-D connector Connects a secondary display.
It is a standard RJ45 connector, providing 10/100 BASE-TX Ethernet
communications channels. It connects an Ethernet network or a PC.
It is a standard RJ45 connector for connecting a CIS network.
WLAN&CF assembly
The CF assembly serves the non-volatile CF storage card which is used for data storage and
transfer. It is connected with the mother board.
2-13
Theory of Operation
2.4 Parameter Module
Each parameter module consists of the module communication board, module power board,
module button board, parameter board, etc.
2.4.1 Module Communication Board
The module communication board allows a short delay when powering up the module and
adopts FPGA to enable infrared communications between the module and the module rack. It
has no electrical connections and is therefore isolated physically. It has an ID, which will be
send to the module rack according to the pre-defined baud rate when a module is plug into
the module rack.
2.4.2 Module Power Board
Some modules have no power board. There are two kinds of module power board:
1. Isolated power board: converts the 12 V DC into a 12 V isolated DC and a 5 V isolated
DC.
2. Non-isolated power board: converts the 12 V DC into a 5 V DC.
2.4.3 Parameter Board
The parameter board is a parameter measurement component, which is the most important
component of the parameter module.
2-14
Theory of Operation
2.5 Satellite Module Rack
The satellite module rack (SMR) is independent of the patient monitor, provides 8 slots for
mounting parameter modules. It has the following features:
It allows a parameter module to be plugged and unplugged with the patient monitor on.
This allows function extension and patient transfer.
It does not have its own power. It introduces 12 V DC from the patient monitor and then
supplies power to each parameter module via the contact screw.
It accomplishes communications protocol conversions between the patient monitor and
each parameter module, provides infrared communications for parameter modules, and
is responsible for detecting infrared communications malfunction for each parameter
module.
The following diagram shows the structure of the SMR.
2-15
FOR YOUR NOTES
Theory of Operation
2-16
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