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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Datex-Ohmeda S/5 monitors

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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

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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

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