Fresenius Pilot Anaesthesia2 Service Manual

TECHNICAL MANUAL

PILOT

Anaesthesia 2

TABLE OF CHANGES

The information given in this document only concern devices of PILOT anaesthesia 2.

Technical reference N° ...................... .....................NT 0818

Revision date: ................................... .....................09/03/99

Applicable from serial N°.................... ..................... 16685686

Date Revision no. Pages concerned Changes

20/10/98 A0 all creation 09/03/99 A1 4

34 49 54 69

New block diagram.

3.2.3. UC board -> Power Supply board. 11: Check anti-siphon arm functionnamity. Trouble shooting. Up grade design ref.

TABLE OF CONTENT

1 OVERVIEW.......................................................................................... 4

1.1. Block diagram..........................................................................................................4

1.2. Precautions before use.............................................................................................5

1.3. Overall product specifications ..................................................................................5

1.3.1. Biological specifications.........................................................................................5

1.3.2. Mechanical specifications......................................................................................5

1.3.3. Dimensions ...........................................................................................................5

1.3.4. Electrical specifications..........................................................................................5

1.3.5. Electronic specifications ........................................................................................5

1.3.6. PILOT anaesthesia 2 Operator's guide..................................................................5

2 ELECTRONIC BOARD........................................................................6

2.1. MOTOR POWER SUPPLY AND CONTROL BOARD .............................................. 6

2.1.1. Functional description............................................................................................6

2.1.2. Description of connectors.................................................................................... 13

2.1.3. Electrical layout................................................................................................... 15

2.1.4. Installation layout .................................................................................................15

2.2. CPU BOARD..........................................................................................................16

2.2.1. Functional description..........................................................................................16

2.2.2. Description of connectors.................................................................................... 19

2.2.3. Electrical layout................................................................................................... 21

2.2.4. Installation layout .................................................................................................21

2.3. DISPLAY BOARD.................................................................................................. 22

2.3.1. Overview.............................................................................................................22

2.3.2. Functional description..........................................................................................22

2.3.3. Description of connectors.................................................................................... 24

2.3.4. Power consumption............................................................................................. 24

2.3.5. Electrical layout................................................................................................... 24

2.3.6. Implantation layout ..............................................................................................24

3 CONFIGURATIONS, CALIBRATIONS AND CHECK........................25

3.1. CONFIGURATIONS...............................................................................................25

3.1.1. Configuration of the pressure functions................................................................25

3.1.2. Moving to the pressure configuration mode.......................................................... 25

3.1.3. Other parameters configuration ...........................................................................26

3.2. Calibration..............................................................................................................33

3.2.1. Three tension levels of battery calibration: EtAL.4.............................................33

3.2.2. Movement sensor calibration: EtAL.6................................................................34

3.2.3. Strength sensor calibration "EtAL.9" .................................................................34

NT 0818 Rev.A1 page : 1

3.3. CHECKING THE PILOT.........................................................................................35

3.3.1. The After Sale Service test ..................................................................................35

3.3.2. Running time tESt.1........................................................................................36

3.3.3. Lights test tESt.2............................................................................................36

3.3.4. Key board test tESt.3.......................................................................................36

3.3.5. Battery voltage display tESt.4.......................................................................... 37

3.3.6. Last 10 alarms codes tESt.5...........................................................................37

3.3.7. Total running time tESt.6 ................................................................................38

3.3.8. TTL Serial link test: tESt.7...............................................................................38

3.3.9. Serial link test: tESt.8....................................................................................... 38

3.3.10. Strength on the plunger display: tESt.9......................................................... 38

3.3.11. Software version tESt.A .................................................................................39

3.3.12. Analog input display tESt.B............................................................................39

3.3.13. Driving block position display tESt.C...............................................................39

3.3.14. Buzzer test tESt.d..........................................................................................39

3.3.15. Calibration values display tESt.E....................................................................40

3.3.16. Syringe type display tESt.F............................................................................ 40

3.3.17. Displays of the last 10 events before the last blocking error tESt.J................. 40

3.3.18. Drug library tESt.L .........................................................................................40

4 REPLACING SUB-ASSEMBLIES......................................................41

4.1. Mounting the flexible circuit....................................................................................41

4.2. Wiring the components on the flexible circuit .........................................................42

4.2.1. Mounting the potentiometer.................................................................................43

4.2.2. Wiring the potentiometer ..................................................................................... 43

4.2.3. Plug holder connector..........................................................................................44

4.2.4. Lubricating the mechanical parts .........................................................................44

5 MAINTENANCE................................................................................. 45

5.1. Recommendations................................................................................................. 45

5.2. Cleaning and disinfection.......................................................................................45

5.3. Storage.................................................................................................................. 45

.........................................................................................................................................

5.6. Checking disengagement system........................................................................... 50

5.7. Checking force sensor............................................................................................50

5.8. Checking back-pressure.........................................................................................50

5.9. Checking registered syringe list /syringe list label...................................................51

5.10. Checking Mains/Battery operation........................................................................51

5.11. Checking linearity.................................................................................................51

5.11.1. Equipment used ................................................................................................51

5.11.2. Operating mode.................................................................................................52

Page : 2 NT 0818 Rev.A1

5.12. Checking end of infusion......................................................................................53

5.12.1. End of infusion pre-alarm...................................................................................53

5.12.2. End of infusion alarm......................................................................................... 53

5.13. Checking the Led's and keyboard.........................................................................53

5.14. Battery autonomy test .......................................................................................... 53

5.15. Continuity test ......................................................................................................53

5.16. Trouble Shooting.................................................................................................. 54

5.17. Error message Er(-)0, Er01, Er(-)2, Er03, CFPc ...................................................55

5.18. Flow rate control protocol: flow rate measurement with computer......................... 55

5.18.1. Equipment used: ............................................................................................... 56

5.18.2. installation......................................................................................................... 56

5.18.3. Operating mode.................................................................................................57

5.18.4. Installation drawing............................................................................................ 57

5.19. Flow rate control: flow rate control measurement with scales................................ 57

5.19.1. Equipment used: ............................................................................................... 57

5.19.2. Installation.........................................................................................................58

5.19.3. Operating mode.................................................................................................58

5.20. Flow rate control: flow rate measurement using a test tube................................... 59

5.20.1. Equipment used ................................................................................................59

5.20.2. Installation.........................................................................................................59

5.20.3. Operating mode.................................................................................................59

6 ANNEX 1: ILLUSTRATED PARTS LIST........................................... 61

6.1. Subassembly traceability table...............................................................................61

6.1.1. Introduction .........................................................................................................61

6.1.2. Replacement parts table ......................................................................................61

6.2. Exploded views and related parts lists.................................................................... 62

6.2.1. Mechanical part list..............................................................................................62

6.2.2. Electronical parts list............................................................................................ 67

6.2.3. Operator’s guide of PILOT anaesthesia 2 (NU).................................................... 68

6.2.4. Labels .................................................................................................................68

7 ANNEX 2: ELECTRONIC LAYOUT................................................... 69

7.1. Rear door wiring..................................................................................................... 69

7.2. Power supply and control board.............................................................................. 69

7.2.1. Electronic layout..................................................................................................69

7.2.2. Installation layout ................................................................................................ 69

7.3. CPU board............................................................................................................. 69

7.3.1. Electronic layout..................................................................................................69

7.3.2. Installation layout ................................................................................................ 69

7.4. Display board.........................................................................................................69

7.4.1. Electronic layout..................................................................................................69

7.4.2. Installation layout ................................................................................................ 69

8 ADDENDA AND INFORMATION BULLETINS 9 USEFUL ADDRESSES

NT 0818 Rev.A1 page : 3

1 OVERVIEW

1.1. Block diagram

Ext

12/15V

15W

230V

EPROM 128K x 8

UART

RAM

8K x 8

interface

Power supply

Battery

EEPROM

512

Bus

BUS

SPI

ON / OFF

CPU

DC-DC

Converter

Watch

dog

opto

Interface

ADC

Motor driver

Step

by step

motor

Motor rotation sensor

Syringe barrel sensor

Antisiphon sensor

Occlusion strength sensor

Displacement sensor

Nurse call (option)

Disengagement Switch

RS232

Keyboard

Master

Buzzer

LCD driver

LED driver

LCD

Display

LED

Display

Flange Switch

Page : 4 NT 0818 Rev.A1

1.2. Precautions before use

Please consult the user guide

1.3. Overall product specifications

1.3.1. Biological specifications

Infusion liquid only comes into contact with the syringe and associated disposable.

1.3.2. Mechanical specifications

Device operation is based on a "lead screew/nut" principle. The mechanism pushes the piston of a syringe, of a given diameter, in a linear manner.

1.3.3. Dimensions

q H x L x D120 x 330 x 155 mm. q CarrWeight 2.2 kg approximately.

1.3.4. Electrical specifications

q Power supply 230V - 50-60 Hz.(Check on the pump the identification label). q Maximum consumption 23 VA. q Fuse F2 100 mAT 250V IEC 127 q Battery 6V - 1.2Ah./1.3 Ah q External power supply 12 - 15 DC - 15W

1.3.5. Electronic specifications

The PILOT anaesthesia 2 syringe pump is fitted with 3 circuit boards whose features vary in line with product specifications and options.

q Motor power supply and control board. q CPU board. q Keyboard display board.

1.3.6. PILOT anaesthesia 2 Operator's guide

Operator's Guide can be obtained from our After Sales Service (see chapter 10.Useful addresses).

NT 0818 Rev.A1 page : 5

2 ELECTRONIC BOARD

2.1. MOTOR POWER SUPPLY AND CONTROL BOARD

2.1.1. Functional description

In order to simplify wiring the motor power supply control board concentrates 6 functional modules, which may be described separately:

q power supply module, q motor control module, q analog output module, q disengage and anti-siphon opto switch module, q microswitch input module, q optional nurse call and RS232 interface module.

2.1.1.1. Power supply module

The power supply module consists of a cut-out power unit. It supplies all electronic components and charges a 1,1 Ah / 1,2 Ah backup battery from a mains voltage input or a 12/15 volt DC power source. It generates the + 5V and Vbat voltage required by the electronic components. Finally it comprises an ON/OFF switch controlling the various power supplies.

2.1.1.1.1. Mains power supply

The mains power supply generates a DC voltage ranging from 10 and 16 volts for a maximum current of 1,2 A.

J1 mains input connector: 1 phase

2 neutral Transformer: TR1(see Electrical chart), 15VA output voltage: 9 Vac Fuse protection: F2 Principal characteristics chap1.1 Primary filtering 4.7 nf 4000 V HR capacitor, type DS1510 VDE Secondary filtering C10 Chemical Capacitor

Output voltage measured on TP3 for mains voltage: 230V measured (±± 10%)

Min Max Unit power off: 14 16 V dc 7 ohm charged on J4: 10 16 V dc primary current charged: 80 mA ac Maximum voltage 16 volts limited by the diode D 41 Minimum voltage 10 volts limited by the mains voltage - 10% and U1(MAX 652)

voltage higher than 10 volts.

Page : 6 NT 0818 Rev.A1

2.1.1.1.2. External 12-15V AC/DC power supply

The DC power supply input is designed to provide the syringe pump with a constant, external power source, such as a 12V battery.

Maximum input voltage ± 15 volts protection against polarity inversion by the PR2 WO4 diode bridge. Minimum input voltage ± 11 volts 1.2 A limited by input voltage MAX 625 and loss, diode bridge on the PR2. Limitation ± 16 volts maximum for through D 41.

2.1.1.1.3. Cut-out charger/controller

The controller is powered either from the mains or from an external DC power source. It generates a maximum voltage of 6.9V VBC, as required to charge the 1.1/1.2 Ah gelified lead battery, connected to J4, and power the electronic components.

J4 Connector: 1 battery +

2 battery -

VBC power comes directly from the battery if neither the mains nor the external power source are connected. Otherwise power, from an external source, supplies the electronic components and charges the battery via diode D8 and the delayed protection fuse, F1, 1.6A.

Maximum fuse resistance 0.5 Ohms Controller operation is indicated by two signals responsible for reporting operation using an external

power source either mains power or the external DC power unit. LDSECT 10 mA drives a diode which checks that the SECT diode is on, using a TTL signal, with + 5V

pull up collector open, mains presence active at 0. Cut-out controller: U1(MAX625) output voltage 7.05V 1.3 A min Output voltage measured on J4.1 for 230 V mains:

Min. Max. Unit Power OFF 3 mA charge on J4. : 6.7V 7V V DC 8 ohm charge on J4: 6.5V 7V V DC

On J4 the voltage must never exceed 7V, the maximum voltage of the charged battery. The 6.5 minimum voltage is higher than the battery pre-alarm threshold.

2.1.1.1.4. ON/OFF control

The VBAT and + 5V control system is implemented using the following circuits: U2 4011, U4 4528 and an G6AK 234P flip-flop relay. This system is powered, at all times, by the VBC voltage.

2.1.1.1.4.1 System:

3 inputs: TON ON key dry contact/GND TOFF OFF key dry contact/GND CDALIM active TTL signal with voltage cut-out

2 ouputs: VBAT Battery power/mains power. OFF TTL signal collector, + 5V PULL-UP open, OFF key pressed down, active at 0

NT 0818 Rev.A1 page : 7

2.1.1.1.4.2 Operation:

Press TON briefly to turn power on. Press TOFF continuously (5s<t<7s) to turn power off during a technical Failure. Press OFF 3 seconds to power OFF via CDALIM micro signal. The device can set ON or OFF via an external. Master module using the CD ON or CD OFF signal.

2.1.1.1.5. VBAT and + 5V power supply

VBAT voltage corresponds to mains voltage taken directly from the power unit/charger. Voltage is not controlled. It powers the display system and the motor, both of which are heavy duty energy consumers.

This voltage is available on TP1 and J2

Min Max

VBAT 6,5V 7V

The + 5V ± 5% is generated, using VBAT voltage, by the NS 2931 V3 controller low drop-out 0.6V for a 100 mA output current.

It is thus possible to make the best possible use of the battery.This voltage is available on TP2. The 5V rise time must be greater than 100 ms to allow for the RESET function on the CPU board.

2.1.1.2. Motor control module The control module of step by step motor is equipped with a gear reduction of 89.286. which makes the

double threaded screw 2 mm turn.

- One motor step is equivalent to 0.8233 µm of linear displacement of the driving bloc.

- One motor turn is equivalent to 22.4 µm of linear displacement of the driving bloc.

2.1.1.2.1. Motor control

PILOT anaesthesia 2 motor control is implemented by a stepper motor driver, dual pole control module for a motor - UBB 5N model - (11.5 Ohm coil) built using an ST L293E IC7 motor control circuit.

It features two functional modules: The motor control electronic parts, built around the L293E U13 circuit, optimizes consumption and opti-

mal motor torque according to the pump flow rate.

2.1.1.2.1.1 Input signals

These signals are generated by the CPU board microprocessor and available on J02. They drive the U15 ULN2803 circuit.

2.1.1.2.1.2 Output signals

These signals are connected to the motor coils via J5 connector.

Phase A A Motor phase control J2.5 Phase B B Motor phase control J2.6 Phase C C Motor phase control J2.7 Phase D D Motor phase control J2.8 I Motor current reduction control J2.9 B00ST Booster activation and regulation current J2.10

Page : 8 NT 0818 Rev.A1

2.1.1.2.1.3 Booster module

BOOST = 0 The motor is powered via VBAT voltage.

BOOST = 1 Booster function activated, the motor is powered at 12 Volts. L2 reactor, D18 diode, C15 capacitor and T8 transistor assembly allows a voltage of 12 V +/- 2 volts to

be obtained from VBAT. This voltage is available on TP5. The uncoupling frequency, 100 kHz, is generated by U9 oscillator, the booster is activated when the

boost line is at 1.

2.1.1.2.1.4 Soft-start module

The soft-start module, which is designed around the T9 transistor and C21 capacitor allows the pick up current of the uncoupling elevator to be limited when BOOST goes to 1.

2.1.1.2.1.5 Current regulation module

BOOST = 1 and I = 1 regulation motor current module is activated. The regulated current in the motor is 240 mA +/- 10% per motor phase. The signals amplitude and current image are available in TP6 and TP7. The current image of each coil is compared to a fixed level, which is implemented from the Divider

bridge using R31, R41/R37 and R42. The control is achieved through the U11 toggle, via a divider bridge by inhibition or confirmation of the

L293E control H bridge driving the CE1 and CE2 inputs. The calibrating frequency of 25 kHz is supplied by the U10 toggle.

2.1.1.2.1.6 Reduction current module

When the Boost signal sets at 0, the I line is used as current reducer.

I = 1 The H divider bridge is controlled by the A, B,C and D lines. I = 0 The H divider bridge is inhibited, the coils are not forwarded.

According to its rotation frequency (step/second), the motor is driven in one of the 3 control modes.

Mode Frequency motor (step/second) Control description Phase 1 from 0 to 32.3 Current reduction one ON supply Phase 2 from 32.3 to 90 No current reduction and regulation, one ON supply Phase 3 from 90 to 850 Current reduction, booster ON two supply

NT 0818 Rev.A1 page : 9

2.1.1.3. Analog output module The analog output module is built around a 10 bit, 5 channel analog/digital converter (MC 145053 U17)

with an SPI bus. The following SPI CLK, SI, SO, CSADC bus signals are available on connector J2: In addition the component generates an end of conversion signal (EOC). The CDANA signal, which is active when set to 1, controls the transistor T14 IRFD 9120 which digitally drives VREF. This voltage supplies the sensors and serves as a reference value for the ADC convertor. All the test points are concentrated on connector J9. Measurement of VREF on J9.7 VREF Pulsated signal of 5Volt ± 0.25V.

 Convertor input:

ANO VBAT battery voltage measurement. AN1 not in use AN2 internal occlusion gauge bridge AN3 NU AN4 Absolute potentiometric position sensor

2.1.1.3.1. Battery voltage measurement

VBAT voltage is measured using a peak detection circuit comprising D19, R59, R60 and C23 in order to overcome the lower voltage created by the motor's pulsing demand for current. The voltage is available on J9.3.

For VBAT = 6.5V, V(J9.3)= 4V ± 10% motor running at 150 ml/h

2.1.1.3.2. Gauge bridge interfaces

The only PILOT anaesthesia 2 includes a force sensor fixed on the pusher.

2.1.1.3.2.1 Force sensor characteristics

Sensor technical Complete bridge with 4 gauges Impedance 350 Ohms ± 15% or 1 KOhms ± 15% Measurement range 0 to 150 N Surcharge 250 N Zero

< ± 10mV Sensibility 8.5 to 12 mV at 150 N zero derivation

2.1.1.3.2.2 Operation

85 µV /year

The force sensor generates a differential voltage proportional to the force sensor applied on the driving bloc. This force is amplified by a gain of 200 +/- 20% via an amplifier built around U18 TLC 251. The potentiometer P1 allows the offset to be compensated and for any other offset to be reset from the beginning. The sensor measurement chain transfer function can be defined by calibrating the sensor with two known forces.

AN3 J9.4 Pulsated amplitude signal sets at 0.6 V +/- 0.05 V for no force applied on the driving bloc

2.1.1.3.2.3 Force sensor connector

J8.1 VREF Gauge bridge power supply (+) J8.2 S(-) Out put Gauge bridge (-) J8.3 S(+) Out put Gauge bridge (+) J8.4 GND Gauge bridge power supply (-)

Page : 10 NT 0818 Rev.A1

2.1.1.3.3. Driving bloc position sensor

The absolute position of the driving bloc is obtained by a potentiometric sensor driven by a movement of the driving bloc.

The transfer function of the sensor can be characterized by calibration in two known positions. The sensor is powered by a pulsated voltage. The output is filtered by R62 and C22 linked directly to the

input AN4 (J2) Potentiometer connector:

J3.1 VREF J3.2 Center point J9.2 J3.3 GND

2.1.1.4. Opto switch module The opto switch module comprise 2 optical switches:

q A motor rotation detection switch q A syringe position head detector switch

2.1.1.4.1. Motor rotation opto

The opto switch is mounted on a disk which is pierced with a hole and assembled on the motor. It is used to check motor rotation, the opto diode is controlled in pulse mode to save energy. The optical switch is connected on J5.

Control T11 transistor Current limitation (R51) at 8mA Output T10 transistor TTL level J2.14 Control signal CDOPT1 activate at 1 J2.11 Output signal SOPT1 activate at 1 J5.7 Diode anode J5.8 Diode cathode J5.10 Transistor transmitter J5.9 Transistor collector TdON max 100 µsec TdOFF max 200 µsec

An anti-rebound device made of U20 flip-flop, reshapes the SOPT1 signal. The CDOPT1 and SOPT1 are emitted by the CPU board, and available on J2 connector

2.1.1.4.2. Anti-siphon opto switch

The opto switch is mounted on the plunger holder, it is used to check the presence or not of the syringe head.

 It is connected on J8 connector.

Control T12 Transistor Current limitation (R52) 8mA Output T13 Transistor TTL level Control signal CDOPT2 activate at 1 J2.15 Output signal SOPT2 activate at 1 J2.12 Anode diode J8.6 Cathode diode J8.5 Transistor transmitter common ground J8.10 Transistor collector J8.7 SOPT2 0V Anti - siphon present SOPT2 5V Anti - siphon missing

NT 0818 Rev.A1 page : 11

J8 is the ribbon cable linking the occlusion, disengagement and position sensors located on the syringe pump driver. The CDOPT2 and SOPT2 signals are emitted by the CPU board and available on J2 connector. The opto diode is powered by pulsated voltage in order to save energy.

2.1.1.5. Micro switch module

2.1.1.5.1. Disengagement micro - switch

The microswitch is mounted on the driving bloc ribbon cable. The center point of the microswitch is connected to the ground.

The signals are available on J2 connector.

J8.8 DEB/ON NU J8.9 DEB/OFF OV engaged / 5V disengaged J8.10 GRD

2.1.1.5.2. Nurse call option

This is implemented by a monostable inverter relay RL2, whose two contacts and common point are available on J6 connector, the relay is driven by the BUZ signal which also drives the buzzer on the display board.

J6.6 common point J6.7 contact normally open cut out power 24V/ 1A J6.8 contact normally shut

2.1.1.5.3. RS 232 option

The RS232 option interface RXD1 and TXD1 signals, in compliance with the V24 standard, signals come from the UART 2691 serial link external controller on the CPU board. It is implemented using a U19 LT 1180 CS circuit, associated with +/- 12V voltage generator, C31, C32, C33, C34 capacitors. This circuit is operational only if the pins 2 and 5 of J6 are short-circuited.

J6.1 output transmits data TX1 J6.2 +5V (DSR) J6.3 input receives data RX1 J6.4 GND J6.5 confirmation (DTR) J6.17 CTS J6.18 RTS

2.1.1.5.4. Configuration link and Master plug

The syringe pump PILOT anaesthesia 2 may be fitted to master module connected to the SUB 15 points plug located on the pump rear panel.

The module master communication link is done by the RX2 and TX2 signals.

J6.13 +VBAT Master power J6.14 RX2 Receive data J6.15 TX2 Transmit data J6.16 GND Master ground J6.9 CD-ON Syringe pump ON via master J6.10 CD-OFF Syringe pump OFF via master J6.12 I-SECT Master led main signal J6.11 I-OPTOM Motor rotation opto master control signal J6.19 BUZ Pilot buzzer command signal

Page : 12 NT 0818 Rev.A1

2.1.2. Description of connectors

2.1.2.1. J1 mains connector

Pin description

1 Neutral 2 Phase

2.1.2.2. J2 board / CPU connection

Pin Description

1 + 5V controlled power supply 2 GND power supply 3 + VBAT power supply 4 GND power supply 5 phase A motor control 6 phase B motor control 7 phase C motor control 8 phase D motor control 9 I signal motor control 10 BOOST signal booster command 11 sopt1 opto rotation module out put 12 sopt2 opto anti-siphon module out put 13 not in use 14 cdopt1 opto rotation control module 15 cdopt2 opto anti-siphon module control 16 OFF signal off key pressed ON/OFF 17 SECT mains power on signal power supply 18 CDALIM power cut signal 19 LDSECT mains LED control 20 CTS clear to send 21 DEB/OFF disengage signal active, set to 0 22 RTS request to send 23 OCC/OFF occlusion signal active, set to 0 24 BUZ nurse call relay control 25 EOC end of conversion ADC 26 CSADC selection bus SPI ADC 27 CLK clock bus SPI ADC 28 SI data IN bus SPI ADC 29 SO data out bus SPI ADC 30 CDANA analog sensor power control 31 RX2 receive data TTL line 2 32 TX2 transmit data TTL line 2 33 TXD1 transmit data TTL line 1 34 RXD1 receive data TTL line 1 35 TOFF OFF key 36 TON ON key 37 + VBAT power supply 38 GND power supply 39 + 5V power supply 40 GND power supply

NT 0818 Rev.A1 page : 13

2.1.2.3. J3 potentiometric sensor connector

Pin Description

1 VREF 2 center point 3 GND

2.1.2.4. J4 internal battery connector

Pin Description

1 2

2.1.2.5. J5 motor connector

Pin Description

1 + VBAT 2 + VBAT 3 PHASE D 4 PHASE C 5 PHASE B 6 PHASE A 7 opto rotation anode diode/ + 5V 8 opto rotation cathode diode 9 opto rotation collector transistor 10 opto rotation transmitter transistor / GND

battery + battery -

2.1.2.6. J6 rear panel connector The connector on the rear panel concentrates signals from the external gauge bridge, the optional

RS232 series link, the nurse call relay output and the configuration series link.

Pin Description

1 TX1 transmit data line 1 2 + 5V power supply 3 RX1 receive data line 1 4 GND power supply 5 DTR interface confirm 6 APP-INF COM nurse call relay common point 7 APP-INF NO nurse call relay normally open 8 APP-INF NF nurse call relay normally closed 9 CD ON external ON 10 CD OFF external OFF 11 I-OPTON motor control out put 12 I-SECT main led 13 + V BAT external power plug 14 RX 2 receive data line 2 15 T X 2 receive data line 2 16 GND power supply 17 CTS clear to send 18 RTS Request to send 19 BUZ buzzer external control

2.1.2.7. J7 external DC power supply connector

Pin Description

1 External power +/2 External power -/ +

2.1.2.8. J8 pump ribbon cable connector The pump ribbon cable connector concentrates all the signals from the sensors located in the plunger:

disengage microswitch, gauge bridge and anti-siphon opto switch.

Page : 14 NT 0818 Rev.A1

Pin Description

1 + VREF + internal gauge bridge 2 E1 internal gauge bridge/occlusion input on 3 E2 internal gauge bridge/occlusion input off 4 GND internal gauge bridge 5 C DOPT2 anti-siphon cathode diode 6 + 5V opto anti-siphon anode diode / + 5V 7 S OPT 2 opto anti-siphon collector transistor 8 DEB / ON disengage microswitch on 9 DEB / OFF disengage microswitch off 10 GND

♦ Important: Disassemble the ribbon cable holder on the supply board before extracting the me-

chanical assembly from the lower housing.

2.1.2.9. J9 Test Points

Pin Description

1 GND 2 out put position sensor 3 out put low battery control 4 out put force sensor amplifier 5 N.U. 6 out put optical switch motor control 7 force and position sensor voltage Ref. 8 out put optical switch syringe led detection

2.1.3. Electrical layout

(Refer to Annex 2)

2.1.4. Installation layout

(Refer to Annex 2)

NT 0818 Rev.A1 page : 15

2.2. CPU BOARD

Overview

 The CPU board is fitted to PILOT anaesthesia 2 version, around a 80C32 microprocessor used in

open mode. It concentrates all the peripheral devices directly connected to the 80C32 bus. It is connected to the power supply board by a 40 contacts ribbon cable and to the display board by fixed connectors. It forms a single unit, with the display board, which is fixed to the front panel.

 The CPU board uses CMOS technology in order to minimize power consum ption.  Current used: 5 Volts 80 mA maximum.

2.2.1. Functional description

The CPU board comprises six functional units:

q Ram rom decoding processor q Reset WATCH DOG q Parallel port extensions

display/keyboard interface, motor interface, sensor interface.

q SPI BUS q Asynchronous serial link q Optical sensor

2.2.1.1. RAM ROM decoding processor Decoding is carried out by an IC3 80C32 circuit, running at 12 MHz, clocked by Q1. It is used in open

mode, with the EA*/VP line connected to GND. Address/data de-multiplexing is carried out by a 74HC573 U3. On this BUS are implemented:

32 Ko static RAM U6 27C010 128 Ko (extension to 512 Ko) U4

2.2.1.2. Reset watch-dog The RESET WATCH-DOG module comprises two TL7705 U10 and U11 circuits. Operation: the U10 circuit generates RESET signals, active at 1, for the processor and the UART; RST*

active at 0 generates RESET signals for the other peripheral devices. The signals are activate in two cases:

q when the system is powered up, q as soon as the WATCH-DOG circuit is triggered. It remains active until the power is turned off.

2.2.1.2.1. Reset at power-up

The TL 7705 circuit guarantees the minimum duration of the reset lines, in the active state, once the + 5V voltage has exceeded the circuit operating threshold (4.75V). It returns to the active state, if the + 5V voltage drops below the threshold or if the RESTIN* (U11.2) is at 0. The line is driven by the WATCHDOG module.

The duration of the reset, in the active state, at power-up is set by the C10 capacitor 220nF 100 ms.

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2.2.1.2.2. Watch-dog

The WATCHDOG circuit comprises the following elements: U10, U11, C12, D2, D1, R4, C11. When powered up the capacitor C12 is charged by the U10 circuit, via diode D1.

The charge is maintained at a threshold of over 1.5 V during operation. The software writes, every 1 ms.This writing generates a 5V/1µs impulse on the U7.10 output, which re-

charges the capacitor C12 via a high pass peak detector circuit made up C8, D3, D2. The C12 capacitor discharges in resistor R4.

When the software stops, the capacitor C12 completely discharges. The U11 RESTIN* line falls to 0 and the RESET signals are activated, stopping all syringe-pump control operations in the inactive state. Fault signals, the blinking FAIL diode and the continuous BUZZER are stuck in an active state.

WATCH-DOG trigger time is less than 400 ms.

2.2.1.3. Keyboard/display interfacing

2.2.1.3.1. Display registers

The display system is made of LED’s and of a 2 lines of 20 characters LCD graphic screen.The U7 circuit allows to address the matrix of the LED’s, the U8 circuit allows the writing and reading in the display controller.

The LED’s matrix are DIG0 to DIG7 and SEG0 to SEG7. The FAIL LED shows the device is failed, the command is inverted to be active by default at RESET. It

is active at 1 on the display board. The FAIL diode is out of the matrix to be able to light on when the micropossor does not work.

2.2.1.3.2. Buzzer

The BUZZER command is inverted and controls the transistor, T3, which is mounted as a common transmitter. Working in parallel, the transistor collector drives the BUZZER on the display board and the nurse call relay on the motor control power supply board. After starting the pump, the BUZZER is activated for added safety.

BUZZ signal: J5 pin 6 and J3 pin 24 50 mA 6.75 Volts maximum.

2.2.1.3.3. Keyboard register

The keyboard is based on a 6 x 3 matrix, with 2 separate keys - TON and TOFF - with 1 common point (GND). They turn power ON and OFF respectively and are connected to the display board. TON and TOFF signals only transits via the CPU board.

The columns of the keyboard are driven by the same signals as the columns in the display matrix, thus facilitating simultaneous keyboard and display monitoring. Register U15 reads the status of the three keyboard lines, LIG1, LIG2 and LIG3 in order to check whether a key has been activated.

2.2.1.3.4. Motor control register

The U12 motor control register generates 4 motor phase signals, A,B,C and D, the I current control signal, the motor rotation opto control CDOPT1 signal and the BOOST BOOSTER control signal.

2.2.1.3.5. Sensor status register

The U16 sensor status register reads the microswitch digital sensors and the syringe pump opto switch.

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2.2.1.4. SPI bus EEPROM The SPI bus is synchronous series communication bus using various peripheral circuits. The SPI bus is

driven by the 80C32 ports. The PILOT anaesthesia 2 syringe pump has 2 peripheral devices on the SPI bus:

q The EEPROM 2 Ko 24C16 U12 located on the CPU board. q The MC 145053 analog/digital converter located on the motor board.

This bus has 2 communication lines: 80C32 (see electrical diagrams)

Micoprocessor Ports

CLK clock generated by the microprocessor P 1.1 SI peripheral to processor data (input) P 1.2

2.2.1.5. Asynchronous serial links The PILOT anaesthesia 2 syringe pump is fitted with two asynchronous serial links.

RS232 option line 1 TTL configuration serial link line 2

2.2.1.5.1. RS232 serial link

The RS232 serial link is implemented using the U8 SCC2691 circuit, which controls asynchronous communication, and RS232 interface circuit which is located on the motor power supply board.

The circuit is clocked by quartz Q2 at 3.6864 MHz. It includes a programmable baud rate generator. It generates interrupts on the ITRS232 line connected to the processor at INTO.

The SCC2691 is on the microprocessor bus. It drives the RXD1 receive data signals on J3 (pin 34) and TXD1 transmit data signals on J3 (pin 35).

The RS232 option is reserved for dialogue with the host computer responsible for monitoring or controlling the system.

2.2.1.5.2. TTL serial link

The TTL serial link is driven by the serial link controller inside the microprocessor. It uses one of the internal timers to generate its baud rate, from the basis of the processor 12 MHz clock. The serial link drives the TXD2 transmit data and RXD2 receive data lines. The input and output lines are buffered by the U9 74HC14 buffer trigger inverter circuit.

The lines are available on J3.

TX2 J3 pin 33 RX2 J3 pin 34

This serial communication line is reserved for PILOT anaesthesia 2 software configuration and, when appropriate, for connecting an external MASTER module.

2.2.1.6. Opto switch sensors PILOT anaesthesia 2 syringe pump opto switch sensors are for piston pressure and syringe body pres-

ence and motor rotation. The syringe body opto switch interface is located on the CPU board. It is implemented using transistors

T1, T2 and T3. Resistor R9 limits current in the diode to 8 mA.

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2.2.1.6.1. Opto switch body syringe measurement.

q Note: The CI opto and the obturator are specific to the PILOT anaesthesia 2 equipped with

"flange detector" and are not compatible with previous versions.

q 2 opto devices allow to detect 2 syringe sizes: 60 cc and 20 cc.

J2.1 opto diode +5V anode J2.2 opto cathode common point and transistor transmitter J2.3 opto 1 transistor collector J2.4 opto 2 transistor collector

Control signal: CODPT3 activate at 1 driven by microprocessor line T0. Output signal: SOPT4 activate at 1 register U16 D1 address $ C000 Output signal: SOPT3 activate at 1 register U16 D0 address $ C000

SOPT3 SOPT4 Syringe clamp detection alarm, high position 1 0 60 cc detection 1 1 20 cc detection 0 1 Syringe clamp detection alarm, low position 0 0

The motor rotation and piston presence opto switch interfaces are located on the POWER SUPPLY BOARD.

2.2.1.6.2. Motor rotation opto switch

Control signal: CDOPT1 activate at 1 Output signal: SOPT1 activate at 1

2.2.1.6.3. Piston presence opto switch (anti-siphon)

Control signal: CDOPT2 activate at 1 Output signal: SOPT2 activate at 1

2.2.2. Description of connectors

2.2.2.1. J1 not used This connector is not used for the moment but it will be used for a future evolution of the software.

2.2.2.2. J2 Opto switch - syringe body connector

Pin Description

1 ground 2 flange switch 3 opto +5 V diode anode 4 cathode diode transmitter transistor opto 1 and opto 2 common points 5 collector transistor opto 1 6 collector transistor opto 2

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2.2.2.3. J3 Power supply/CPU ribbon cable  A 40 channel ribbon cable is soldered directly to J3, linking the power supply and the CPU.

Pin Description

1 + 5V controlled power supply 2 GND " 3 + VBAT " 4 GND " 5 A phase motor control 6 B phase " 7 C phase " 8 D phase " 9 I signal " 10 BOOST signal " 11 SOPT1 opto rotation module output 12 SOPT2 opto anti-siphon module output 13 APINF nurse call independent from buzzer signal 14 CDOPT1 opto rotation module control 15 CDOPT2 opto anti-siphon module control 16 OFF ON/OFF key depressed signal 17 SECT mains power supply on signal 18 CDALIM power cut signal 19 LDSECT mains LED control 20 CTS Clear to send line 2 21 DEB/OFF disengage active at 0 signal 22 RTS Request to send line 2 23 OCC/OFF occlusion active at 0 signal 24 BUZ nurse call relay control 25 EOC end of conversion ADC 26 CSADC selection SPI ADC bus 27 CLK clock SPI ADC bus 28 SI data INSPI ADC bus 29 SO data out SPI ADC bus 30 CDANA analog sensor power supply control 31 RX2 receive TTL data line 2 32 TX2 transmit TTL data line 2 33 TXD1 transmit TTL data line 1 34 RXD1 receive TTL data line 1 35 TON ON key 36 TOFF OFF key 37 + VBAT power supply 38 GND 39 + 5V 40 GND

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