Datex-Ohmeda S-5 Service Manual M-INT

Datex-Ohmeda

S/5™ Interface Module, M-INT (Rev. 01)

Technical Reference Manual

Datex-Ohmeda Inc.
3030 Ohmeda Drive
53707-7550 MADISON, WIS
USA
Tel. [phone],Fax [phone]

www.us.datex-ohmeda.com

All specifications are subject to change without notice.

Document No. 8001021-1

June 2001

Datex-Ohmeda Division,

Instrumentarium Corp.

P.O. Box 900, FIN-00031

DATEX-OHMEDA, FINLAND

Tel. [phone] Fax [phone]

www.datex-ohmeda.com

 Instrumentarium Corp. All rights reserved.

Table of contents

TABLE OF CONTENTS

Interface Module, M-INT (Rev. 01)

TABLE OF CONTENTS i

TABLE OF FIGURES i

Introduction 1

1 Specifications 2

1.1 Serial I/O Definitions ................................................................................................................................2

1.2 Analog definitions.....................................................................................................................................2

2 Functional Description 3

2.1 Main components.....................................................................................................................................4

2.2 Connectors and signals.............................................................................................................................5

2.2.1 Module bus connector......................................................................................................................5

2.2.2 Interface board connectors ...............................................................................................................6

2.2.3 Front panel connectors.....................................................................................................................6

3 Service Procedures 8

3.1 General Service Information ......................................................................................................................8

3.2 Service check ...........................................................................................................................................8

3.2.1 Recommended tools ........................................................................................................................8

3.3 Disassembly and reassembly..................................................................................................................12

4 Troubleshooting 13

4.1 Troubleshooting chart .............................................................................................................................13

5Service MENU 14

5.1 Interface menu .......................................................................................................................................15

6 Spare Parts 17

6.1 Spare Parts List.......................................................................................................................................17

6.1.1 Interface Module, M-INT, Rev. 00 ....................................................................................................17

6.1.2 Interface Module, M-INT, Rev. 01 ....................................................................................................18

7 Earlier Revisions 19

APPENDIX A 21

Service check form A-1

TABLE OF FIGURES

Figure 1 Interface Module, M-INT........................................................................................................................1

Figure 2 Interface Module, M-INT, block diagram ................................................................................................3

Figure 3 Exploded view of module box and M-INT ..............................................................................................17

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INTRODUCTION

The Interface Module, M-INT, provides an interface between the S/5 Critcal Care and Anesthesia
Monitors and other external monitors such as, Datex-Ohmeda Cardiocap and Capnomac Ultima,
Criticon Dinamap 1846 SX, and Abbott Oximetrix 3.

Interface Module, M-INT

Figure 1 Interface Module, M-INT

NOTE: The Interface Board, B-INT, and Interface Module, M-INT, cannot be used simultaneously in
the same monitor.

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1 SPECIFICATIONS

1.1 Serial I/O Definitions

• RS-232 buffered (channels 1-2)

• All standard baud rates are possible from 300 to 115200

• Each interfaced device has fixed baud rate.

1.2 Analog definitions

• There are four analog inputs available on channel 1 and four on channel 2.

• All analog inputs are Op-Amp buffered, with an input impedance of 1 MΩ. Each analog

input is also equipped with a 1 MΩ pull-down resistor to -12 V for NC detection.

• Sampling rate: 10 ms/sample/channel

• Input range: -10 V...+10 V

• Resolution: 10 bits → 1024 voltage levels in input range

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2 FUNCTIONAL DESCRIPTION

The Interface Module, M-INT, detects and identifies the external monitors connected to the
module. The identification is made by a serial string, sent by the external monitor.

When an external monitor is connected to the Interface Module, numeric data is always displayed
on the monitor screen. Also, analog real time waveforms are displayed, if the external monitor is
able to send them.

Connections from the Interface Module to external monitors are isolated from S/5 monitor.

Interface Module, M-INT

Figure 2 Interface Module, M-INT, block diagram

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2.1 Main components

The Interface Module contains an 80C196KC16 microprocessor.

External Connections

The connectors on the Interface Module are:

• One 25-pin D-connector X1 for the module bus.

• Two 9-pin connectors, X2 and X3, for external monitors. These are internally connected to

two 9-pin female D-connectors via ribbon cables.

Each X2 and X3 connector has an RS-232 serial communication channel and four analog inputs.

RS-485 Serial Communication

The Interface Module uses RS-485 signal levels when communicating with the external monitor.
The RS-485 signals are transformed to digital signal levels and fed via an opto-isolator to the
microprocessor. The communication signals for transmitting (TxD) and receiving (RxD) data are sent
to the microprocessor ports. The direction of the communication is controlled by REC/SND signals,
generated by the microprocessor, via the opto-isolator. When the module bus is reset, the
communication is always set to the receiving state.

Reset

The interface board resets when module bus is reset. The RESET signal is converted from an RS­485 signal level to a digital signal level and then fed to an opto-isolator. The RESET signal is
renamed to POWEROK signal. The POWEROK signal resets the microprocessor and the GAL circuit.

RS-232 Serial Communication

A QUART is used to provide four serial communication channels with external monitors. However,
only two channels are used. The microprocessor controls resetting of the QUART during normal
operation. When the microprocessor is reset the QUART is also reset.

Memories

There are static RAM, ROM, EEPROM memories fitted to the Interface Module. The memory
decoding is done by the GAL circuit. The microprocessor communicates with the EEPROM in serial
mode.

Analog Inputs

Eight analog inputs from the serial/analog connectors are connected to eight low pass filters. The
frequency limit (-3 dB) is set to 35 Hz. The input signal levels are between -10 V and +10 V, and the
output signals are scaled between 0 V and 5 V. The output signals are then fed to the
microprocessor A/D inputs.

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2.2 Connectors and signals

2.2.1 Module bus connector

Interface Module, M-INT

13

25

Module Bus Connector (X1)

Pin No I/O Signal

1 O RESET_RS485

2 O -15 VDC

3 O +15 VDIRTY

4 O +15 VDC

5 I/O -DATA_RS485

6 I/O DATA_RS485

7 Ground & Shield

8 O -RESET_RS485

9 O CTSB

10 I RTSB

11 O RXDB

12 I TXDB

13 Ground & Shield

14 O +32 VDIRTY

15 O GroundDIRTY

16 O CTSC

17 I RTSC

18 O RXDC

19 I TXDC

20 ON/STANDBY

21 BIT0IN

22 RXDD_RS232

23 TXDD_RS232

24 O +5 VDC

25 O +5 VDC

1

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2.2.2 Interface board connectors

Power test connector (X11)

Pin No Signal

1 +5 V TEST

2 +5 V ref

3 +12 V

4 GND

5 -12 V

6NC

Analog test connector (X5)

This connector is for factory tests only.

Pin No Signal

1ACH0

2ACH1

3ACH2

4ACH3

5ACH4

6ACH5

7ACH6

8ACH7

9 GND

2.2.3 Front panel connectors

1

6

Serial/Analog connector(X2) CH 1 (floating, off-board)

Pin No Definition

1 A0 analog input

2RXD

3TXD

4 A1 analog input

5 GND

6 A2 analog input

7RTS

8CTS

9 A3 analog input

5

9

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Serial/Analog Connector (X3) CH 2 (floating)

Pin No Definition

1 A4 analog input

2RXD

3TXD

4 A5 analog input

5 GND

6 A6 analog input

7RTS

8CTS

9 A7 analog input

Interface Module, M-INT

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3 SERVICE PROCEDURES

3.1 General Service Information

Field service of the Interface Module, M-INT, is limited to replacing faulty circuit boards. A faulty
circuit board should be returned to Datex-Ohmeda for repair.

Datex-Ohmeda is always available for service advice. Please provide the unit serial number, full
type designation, and a detailed description of the fault.

CAUTION Only trained personnel with appropriate equipment should perform the tests and

repairs outlined in this section. Unauthorized service may void warranty of the unit.

3.2 Service check

These instructions include complete procedures for a service check. The service check is
recommended to be performed after any service repair. However, the service check procedures can
also be used for determining possible failures.

The procedures should be performed in ascending order.

The instructions include a check form (Appendix A) which should be filled in when performing the
procedures.

The mark

the procedure.

The procedures are designed for monitors with S/5 monitor software of revision 01. However, most
of the procedures also apply to monitors, which contain some other monitor software
type/revision.

? in the instructions means that the check form should be signed after performing

3.2.1 Recommended tools

Tool Order No. Notes

Datex-Ohmeda gas monitor with the SpO2 measurement e.g. ULT-S

INT Interface cable 892377

Calibration gas

SpO2 probe

Screwdriver

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• Detach the module box by removing the two screws from the back of the module. Be careful

with the loose latch and spring locking pin.

1. Check internal parts:

• screws are tightened properly

• cables are connected properly

• all socket mounted IC’s are inserted properly

• the EMC cover is attached properly

• there are no loose objects inside the module

?

2. Check external parts:

• the front cover and the front panel sticker are intact

• the block screws for cables are in place and are tightened properly

• the block screw threads are intact

• all connectors are intact and are attached properly

• the module box, latch and spring locking pin are intact

?

Reattach the module box and check that the latch moves properly.

Interface Module, M-INT

3. Plug the Interface Module into the monitor Central Unit. Check that it goes in smoothly and

locks up properly.

?

• Connect the Datex-Ohmeda gas monitor with the interface cable (order code 892377) to

Interface Module, M-INT, connector 1. Lock the cable properly.

• Turn both monitors on.

• Make sure the serial output mode of the Datex-Ohmeda gas monitor being used is set to

NUMERIC.

• Configure the S/5 monitor screen so that all required parameters are shown, for example:

Monitor Setup - Screen 1 Setup - Waveform Fields - Field 5 - Pleth

Field 6 - Co

4. Set the interface for the Datex-Ohmeda gas monitor being used:

Monitor Setup - Install/Service (password 16-4-34) - Installation -

Interfacing - Gases/Spiro - XXX

SpO

- XXX

2

2

XXX = the gas monitor being used

Check that the menus NIBP and SvO

?

/C.O. are selectable from the menu.

2

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5. Enter the service menu:

Monitor Setup - Install/Service (password 16-4-34) - Service (password 26-23-8)

Take down the information regarding Interface Module, M-INT, software by selecting SCROLL
VERS and turning the ComWheel.

?

6. Enter the M-INT service menu:

Parameters - More - Interface

Check that the “Timeouts”, “Bad checksums” and “Bad c-s by mod” values are not
increasing faster than by 50 per second. Check that the Interface Module M-INT memories
have passed the internal memory test, i.e. “RAM” and “ROM” state OK.

?

7. Check that the interfaced gas monitor is identified, i.e. the required waveform fields are

shown on the screen and the gas monitor type in shown correctly on the service menu.

Check that the communication state is “online”.

?

8. Select GASES from the M-INT service menu.

Check that “id:” states the correct monitor and interface type, “Active” states YES and
“Timeout” NO.

Check that the numeric values on the service menu are reasonable.

Simulate breathing by feeding calibration gas into the Datex-Ohmeda gas monitor sampling
line and check that the values on the service menu correspond with the values on the gas
monitor screen.

Check that the values in the S/5 monitor gas waveform field are correct and a proper CO
waveform is shown.

Stop feeding the calibration gas. Check that the message “Apnea” appears in the S/5
monitor waveform field, and in the message field, if the selected interface type is ULT/al.

?

2

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9. Select SpO2 from the M-INT service menu.

Check that “id” states the correct monitor and interface type, “Active” states YES and
“Timeout” NO.

Check that “ProbeOff” shows 1 when no SpO

probe is connected to the interfaced gas

2

Interface Module, M-INT

monitor. Connect the SpO

Attach the SpO
the values on the gas monitor screen.

Check that the values in the S/5 monitor pleth waveform field are correct and a proper pleth
waveform is shown.

Disconnect the SpO
monitor waveform field, and “SpO
type is ULT/al.

probe to your finger and check that the values on the menu correspond with

2

probe and check that the “NoProbe” shows 1.

2

probe. Check that the message “Probe off “ appears in the S/5

2

probe off” appears in the message field, if the interface

2

?

10. Turn the gas monitor off. Check that the messages “Interfaced Gas monitor removed” and

“Interfaced SpO

monitor removed” appear on the S/5 monitor screen.

2

?

11. Turn the S/5 monitor off. Connect the gas monitor with interface cable to Interface Module,

M-INT connector 2.

Turn the monitors on and check that the necessary numerics and waveforms are still
interfaced, together with the alarms, if the interface type is ULT/al.

?

12. Disconnect the Interface Module, M-INT, for a moment, then plug the module back into the

monitor.
Check that interfacing with the gas monitor is restored.

?

13. Perform an electrical safety check and a leakage current test.

?

14. Check that the Interface Module, M-INT, functions normally after performing the electrical

safety check.

?

• Set the interface back for modules:

Monitor Setup - Install/Service (password 16-4-34) - Installation -

Interfacing - Gases/Spiro - Module

SpO

15. Clean the module with suitable detergent.

- Module

2

?

• Fill in all necessary documents.

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3.3 Disassembly and reassembly

Disassemble the Interface Module, M-INT, in the following way (see figure 3).

1. Remove the two screws from the back of the module.

2. Pull the module box slowly backwards and remove it from the main body.

3. To detach the circuit board, remove four screws and disconnect the two ribbon cables from

the front panel.

To reassemble the module, reverse the order of the disassembly steps.

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4 TROUBLESHOOTING

Enter the Service Menu (see chapter 5). Select Scroll Vers and scroll down the SW version/Unit id
list. Make sure that the software code and level, control and serial numbers of the Interface
Module, M-INT, are displayed under B-INT/M-INT.

If they are not displayed, the Interface Module, M-INT, is faulty.

4.1 Troubleshooting chart

Trouble Cause Treatment

Interface Module, M-INT

M-INT not active in the Service Menu.
Software version and ID data are not
available in the Service Data field.

Measured values from the interfaced
monitor do not appear on the display
after approximately one minute.

Module is not connected
properly.

M-INT is faulty

Monitor not selected for
interface.

Poor contact in the interface
cables.

Wrong interface cable.

Check that the module is firmly
pushed into the module slot.

Replace M-INT Interface board.

Select the right monitor from the
Interfacing menu.

Check the cables and
connections. Change the cable to
another connector.

Check cable type and change if
necessary.

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5 SERVICE MENU

1. Press the Monitor Setup key.

2. Select Install/Service (password 16-4-34).

3. Select Service (password 26-23-8).

4. Select Parameters - More - Interface.

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5.1 Interface menu

Interface Module, M-INT

Interface

Service Data

Gases, SpO2, NIBP, Spirometry, SvO2/C.O. indicate the parameters for which service data is

available. The data which can be seen on those pages is raw data from the interfaced monitors,
which will be processed for the normal screen.

I-INT: Indicates the status of the interface via the UPI4(NET) Board.

B-INT: Indicates the status of the interface via the 4 interface channels of

B-INT or two channels of M-INT module.

id: The name of the interfaced monitor, e.g. Ultima.

state: describes the state of the connection, alternatives are:

'init' - the channel is initialized
'wait' - the monitor is waiting for the external monitor
'online' - the connection is ready
'search' - the external monitor is being searched

rt: real time values that are available via the interface.

Timeouts is a cumulative number that indicates how many times the module has not responded to

the monitor's inquiry.

Bad checksums is a cumulative number that indicates how many times communication from the
module to the monitor has failed.
Bad c-s by mod is a cumulative number that indicates how many communication errors the
module has detected.
The monitor starts counting these items at power up and resets to zero at power off. The nonzero
values do not indicate a failure, but the continuous counting (more than 50 per second) indicates
either serial communication failure, or module not in place. Also other modules can cause
communication errors which cause these numbers rise.

RAM indicates the state of the RAM memory.

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ROM indicates whether the checksum in the ROM is in accordance with the software calculated
value.
The state is either OK, Fail or ? (module not in place or a communication error).

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6 SPARE PARTS

6.1 Spare Parts List

NOTE: Accessories are listed in the Patient Monitor Supplies and Accessories.

6.1.1 Interface Module, M-INT, Rev. 00

15

9

4

Interface Module, M-INT

12

6

57

10

8

1

3

2

14

13

16

17

11

M-I N T

Figure 3 Exploded view of module box and M-INT

Item Description Order No. Item Description Order No.

1 Module box (single width) 886167 10 Cross cylinder-head screw M3x12 628700

2 Latch 879181 11 Block screw for cables, M-INT *891033

3 Spring pin 879182 12 Fitting plate, M-INT 890869

4 Cross recess screw M3x8 black 616215 13 Connector plate, M-INT 890357

5 Interface board, M-INT (Rev. 00) *890843 14 Front panel frame 879094

6 Cross cylinder-head screw M3x6 61721 15 Nut, hexagon M3 63116

7 Metal frame 879184 16 Cross cylinder-head screw M2.5x10 628708

8 EMC cover 884099 17 Front panel sticker (Eng) 890896

9 D-connector with flat cable, M-INT 891432 - - -

*this part is recommended for stock

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6.1.2 Interface Module, M-INT, Rev. 01

Item Description Order No.

- Front panel sticker 8000214

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7 EARLIER REVISIONS

All main differences of Interface Module, M-INT (rev. 00), are noted in this manual.

Interface Module, M-INT

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Interface Module, M-INT

APPENDIX A

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SERVICE CHECK FORM

Interface Module, M-INT

Customer

APPENDIX A, Service Check Form, M-INT

Service

Service engineer Date

OK = Test OK N.A. = Test not applicable Fail = Test Failed

OK N.A. Fail OK N.A. Fail

1. Internal parts 2. External parts

3. Installation

Notes

4. Interface selection

5. Module software

6. Communication and

memories

8. Gas interface (1) 9. SpO2 interface (1)

M-INT

Module type S/N

7. Recognition of

connection

10. Recognition of

disconnection

12. Restarting

Notes

13. Electrical safety check 14. Functioning after

15. Final cleaning

Notes

Used Spare Parts

Signature

11. Interface (2)

electrical safety check

A-1(1)

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