S5 Interface Board Technical Reference Manual June 2001

Table of contents

TABLE OF CONTENTS Interface Board, B-INT (Rev. 01) TABLE OF CONTENTS

i

Introduction

1

1

2

Specifications

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...6 2.2.1 Bus connectors ...6 2.2.2 Serial connectors ...8 2.2.3 Serial/analog connectors ...9

3

Service Procedures

10

3.1 General service information...10 3.2 Service check ...11 3.2.1 Recommended tools ...11

4

Troubleshooting

16

4.1 Troubleshooting chart ...16

5

Service MENU

17

5.1 Interface menu ...18

6

Spare Parts

20

6.1 Interface Board, B-INT...20

7

Earlier Revisions

21

APPENDIX A

23

Service check FORM

A-1

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ii Document No. 8001006-1

Interface Board, B-INT

INTRODUCTION The Interface Board, B-INT, provides an interface between the S/5 Anesthesia Monitor or the S/5 Critical Care Monitor and other monitors. It also provides a connection between the Central Unit, FCU8, and the Airway Module, G-xxxx.

Figure 1

Interface Board, B-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 1-4)

•

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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Interface Board, B-INT

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FUNCTIONAL DESCRIPTION The Interface Board, B-INT, detects and identifies external monitors connected to the S/5 anesthesia or critical care monitoring system. Identification is made by a serial data string sent by the external monitor. On the front panel of the board there is a 25-pin and a 9-pin D-connector, which are used for sending/receiving digital serial data. The 25-pin D-connector is used for connecting the Airway Module (as the Gas Interface Board is removed when the Interface Board, B-INT is installed). On the surface of the circuit board there are three pin row connectors, one for digital data and two for digital and analog data. If digital and analog real time waveforms are required, the external monitor can be connected to the serial/analog connectors (X7 and X8) using additional interface connector cables.

Figure 2

Interface Board, B-INT, block diagram

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2.1 Main components The Interface Board contains an 80C196KC16 CPU.

External connections The connectors on the board are: •

96-pin E-connector for the CPU mother board (X1)

•

25-pin D-connector for an Airway Module (X3).

•

9-pin D-connector for RS-232 level isolated serial communications (X2). No analog inputs available.

In addition, three pin-row connectors on the circuit board make the following connections possible using an interface connector cable: •

RS-232 level serial and analog connectors for all interfaces (X7, X8).

•

RS-232 level serial digital connector (X9).

X3 and X9 connectors can be used to interface waveforms from Dräger Cato and Cicero external monitors. The Interface Board is connected to the Central Unit module bus through the CPU mother board. Serial communication signals for transmitting (TxD) and receiving (RxD) data are sent to the microcontroller ports. The direction of the communication is controlled by REC/SND/ signal at the buffers. The RESET/ signal always resets the communication to the RxD state.

Reset The Interface Board is reset when the Central Unit is reset (MAIN/RESET/) or when the module bus is reset (RESET_RS485). The RESET/ signal is sent to an address decoding GAL circuit, from which it goes to the microcontroller as RESET/Z. When the RESET/ is active (low), the RESET/Z also goes low and resets the microcontroller.

Serial communication channels A QUART is used to provide four serial communication channels (TxD, RxD). The microcontroller is able to reset the QUART at any time by pulling the QRESET signal high. The QUART is also reset when the microcontroller is reset; the microcontroller pulls all the port 1 signals high when it resets.

Memories There are static RAM, EPROM, EEPROM memories and an address decoding GAL unit on the Interface Board. The microcontroller communicates with the EEPROM in serial mode.

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Interface Board, B-INT

Digital inputs Four digital inputs are connected to connector X9 on the Interface Board. They pass through to the microcontroller's high speed pins (DIGBUS). The digital inputs have an overvoltage protection and a pull-up circuit.

Analog inputs Eight analog inputs are connected to connectors X7 and X8. They pass through EMI filters and lowpass filters to the microprocessor port 0.

Fuse A 4 A fuse is installed on the Interface Board for the +24/+32 Vdirty input supply. This voltage is not used on the board but passed through to the 25-pin D-connector for Airway Module use.

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2.2 Connectors and signals X1 X2

X9 X7 X8 X3

2.2.1 Bus connectors Module bus connector (X1) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

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a

b

c

+15 V -15 V SA0 SA2 SA4 SA6 SA8 SA10 SA12 SA14 SA16 SA18 SA20 SA22 -SMEMR -IOR CLK -IOCHRDY N/C_1 N/C_2 -SBHE SD0 SD2 SD4 SD6 SD8 SD10 SD12 SD14 +15 VD +15 VD GNDD

AGND BALE SA1 SA3 SA5 SA7 SA9 SA11 SA13 SA15 SA17 SA19 SA21 SA23 -SMEMW -IOW -RESET IRQ10 IRQ11 IRQ12 IRQ15 SD1 SD3 SD5 SD7 SD9 SD11 SD13 SD15 -RESET_CPU +32 VD GNDD

DGND DGND DGND RESET_RS485 -RESET_RS485 DATA_RS485 -DATA_RS485 TXDD_RS232 RXDD_RS232 BIT0IN BIT1IN TXDC RXDC RTSC CTSC TXDB RXDB RTSB CTSB TXDA RXDA RTSA CTSA LOUDSPEAKER +5 V +5 V +5 V +5 V ON/STBY +5 V_CPU REFRESH_WD POWER_FAIL

Interface Board, B-INT

13

1

25

14

Airway Module bus connector (X3) Pin No

I/O

Signal

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

O O O O I/O I/O

RESET_RS485 -15 VDC +15 VDIRTY +15 VDC -DATA_RS485 DATA_RS485 Ground & Shield -RESET_RS485 CTSB RTSB RXDB TXDB Ground & Shield +32 VDIRTY GroundDIRTY CTSC RTSC RXDC TXDC ON/STANDBY BIT0IN RXDD_RS232 TXDD_RS232 +5 VDC +5 VDC

O O I O I O O O I O I

O O

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2.2.2 Serial connectors Serial connector (X2) Pin No 1 2 3 4 5 6 7 8 9

I/O I O O O O I

Signal N/C RXD RS TXD RS +5 V GND N/C RTS RS CTS RS N/C

Serial Connector (X9) CH 4 (non-floating, off-board) Pin No

Definition

1 2 3 4 5 6 7 8 9

D0 digital input RXD TXD D1 digital input GND D2 digital input RTS CTS D3 digital input

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Interface Board, B-INT

2.2.3 Serial/analog connectors Serial/analog connector (X8) CH 1 (non-floating, off-board) Pin No

Definition

1 2 3 4 5 6 7 8 9

A0 analog input RXD TXD A1 analog input GND A2 analog input RTS CTS A3 analog input

Serial/analog connector (X7) CH 2 (non-floating, off-board) Pin No

Definition

1 2 3 4 5 6 7 8 9

A4 analog input RXD TXD A5 analog input GND A6 analog input RTS CTS A7 analog input

Power test connector (X4) Pin No

Signal

1 2 3 4 5 6

+5 Vref +5 V +12 V DGND -12 V NC

Analog test connector This connector is for factory tests only.

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3

SERVICE PROCEDURES

3.1 General service information A faulty Interface Board, B-INT, 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.

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Interface Board, B-INT

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.

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

3.2.1 Recommended tools Tool

Order No.

Central Unit Airway Module Datex-Engstrom gas monitor with the SpO2 measurement INT Interface cable Interface connector cable Calibration gas SpO2 probe Screwdriver

892377 882353

• • •

1.

Notes

e.g. ULT-S

Make sure the S/5 monitor is turned to STBY. Press the Service Reset switch at back of the monitor power supply unit for at least five seconds. Disconnect all external interface cables connected to the Interface Board, B-INT. Remove the screws securing the Interface Board, B-INT to the Central Unit and remove the Interface Board. Check that the rear panel connectors are clean and intact. Check that the block screws for cables are in place, are tightened properly and their threads are intact.

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3.

4.

Check all interface connector cables (order code 882353) connected to the Interface Board: the cables are intact and are properly attached with screws the cable connectors are clean and intact the block screws for cables are in place and are tightened properly the block screw threads are intact

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Check the order of the interface connector cables, if connected: • top: connector X8 • middle: connector X7 • bottom: connector X9

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Check that the grounding plate under the rear panel is properly attached and is not bent. NOTE: Older circuit boards may not include the grounding plate.

5.

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Check that the screws fastening the interface connector cable metal bracket to the Interface Board rear panel are tightened properly.

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6.

Check that all socket mounted IC’s are inserted properly.

7.

Check that the fuse and fuse holder are clean and intact. Check that the fuse is of the correct rating (T4A).

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•

•

• • •

Connect the interface connector cable to connector X8 on the Interface Board, if not yet connected. Re-install the Interface Board in the Central Unit and secure the board with two screws. Connect the Airway Module using a gas interface cable to the Interface Board rear panel connector X2. Connect the Datex-Engstrom gas monitor using the interface cable, order code 892377 (use the gender changer) to Interface Board connector X8 (via the connected interface connector cable). Turn both monitors on. Make sure the serial output mode of the Datex-Engstrom gas monitor being used is set to NUMERIC. Configure the S/5 monitor screen so that all the required parameters are shown, for example:

Monitor Setup - Screen 1 Setup - Waveform Fields - Field 5 - Pleth Field 6 - CO2 12 Document No. 8001006-1

Interface Board, B-INT 8.

Set the interface:

Monitor Setup - Install/Service (password 16-4-34) - Installation - Interfacing Gases/Spiro - Module and Monitor Setup - Install/Service (password 16-4-34) - Installation - Interfacing Gases/Spiro - SpO2 - Module Check that menus NIBP and SvO2/C.O. are selectable from the menu.

? 9.

Check that the waveform field for gases is shown on the S/5 monitor screen. When the message “Calibrating gas sensor” disappears, feed calibration gas into the Airway Module sampling line and check that the CO2 waveform and the gas numerics are shown correctly.

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Set the Interface Board for the Datex-Engstrom gas monitor being used:

Monitor Setup - Install/Service (password 16-4-34) - Installation - Interfacing Gases/Spiro - XXX and

Monitor Setup - Install/Service (password 16-4-34) - Installation - Interfacing Gases/Spiro - SpO2 - XXX XXX = the used gas monitor 10. Enter the service menu:

Monitor Setup - Install/Service (password 16-4-34) - Service (password 26-23-8) Take down the information regarding Interface Board software by selecting SCROLL VERS and turning the ComWheel.

? 11.

Enter the B-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 B-INT memories have passed the internal memory test, i.e. “RAM” and “ROM” state OK.

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Check that the interfaced gas monitor is identified, i.e. the required waveform fields are shown on the screen and the gas monitor type is shown correctly on the service menu. Check that the communication state is “online”.

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13.

Select GASES from the B-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-Engstrom 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 CO2 waveform is shown. Stop feeding 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.

? 14.

Select SpO2 from the B-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 SpO2 probe is connected to the interfaced gas monitor. Connect the SpO2 probe and check that “NoProbe” shows 1. Attach the SpO2 probe to your finger and check that the values on the menu correspond with 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 SpO2 probe. Check that the message “Probe off “ appears in S/5 monitor waveform field, and “SpO2 probe off” appears in the message field, if the interface type is ULT/al.

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15.

Turn the gas monitor off. Check that the messages “Interfaced Gas monitor removed” and “Interfaced SpO2 monitor removed” appear on the S/5 monitor screen.

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Interface Board, B-INT 16.

Turn the monitor off. Connect the gas monitor with the interface cable, to Interface Board, BINT, connector X7 (via the interface connector cable). If necessary, remove the Interface Board, B-INT, for relocating the interface connector cable. Turn the monitors on and check that the necessary numerics and waveforms are still interfaced, together with the necessary alarms, if the interface type is ULT/al.

? 17.

Turn the monitors off. Connect the gas monitor with the interface cable, to Interface Board, B-INT, connector X9 (via the interface connector cable). Turn the monitors on and check that only the necessary numerics are interfaced, together with the necessary alarms, if the interface type is ULT/al.

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18.

Turn the monitors off. Connect the gas monitor with the interface cable, to Interface Board, B-INT, connector X3. Turn the monitors on and check that only the necessary numerics are interfaced, together with the necessary alarms, if the interface type is ULT/al.

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19.

Perform an electrical safety check and a leakage current test.

20.

Check that the Interface Board, B-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 and Monitor Setup - Install/Service (password 16-4-34) - Installation - Interfacing Gases/Spiro - SpO2 - Module •

Fill in all necessary documents.

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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 Board, B-INT, are displayed under B-INT/M-INT. If they are not displayed, the Interface Board, B-INT, is faulty.

4.1 Troubleshooting chart Trouble

Cause

Treatment

B-INT not active in the Service menu.

B-INT is not connected properly.

Check that B-INT is firmly pushed into the connector.

B-INT is faulty.

Replace B-INT and send it for repair.

Monitor not selected for interface.

Select correct monitor from Install/Service - Interfacing menu.

Poor contact in the interface cables.

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

Wrong interface cable.

Check cable type and if necessary change the cable.

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

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Interface Board, B-INT

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.

5.

Select More… .

6.

Select Interface.

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