Technical Manual MU_BINTGEN_AN_001_D.pdf

NAVBox

Technical Manual

NAVBox – Technical Manual

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Table of Content

I DESCRIPTION

I.1 Presentation I.1.1 General Presentation I.1.2 External Description I.1.3 Internal Description I.1.4 Connecting Plate

I.2 Technical Characteristics I.2.1 Mechanical Characteristics I.2.2 Electrical Characteristics I.2.3 IEC 60945 Conformity I.2.3.1 Environental characteristics

I.2.3.2 EMC

I.2.3.3 Vibrations I.2.3.4 Shocks I.2.4 Inputs – Outputs I.2.4.1 Serial Compass I.2.4.2 Fluxgate Compass I.2.4.3 Gyros I.2.4.4 Sensors (DGPS, EMLog...)

I.2.4.5 External Data I.2.4.6 Repeaters I.2.4.7 Synchro/Stepper Box I.2.4.8 Status Outputs I.2.4.9 Panel PC I.2.4.10 Optical Ring I.2.5 Connections I.2.5.1 External Box Connection I.2.5.2 Internal Box Connections I.2.5.3 Connectors Position on PCB1 I.2.5.4 Connection Details

II OPERATION

II.1 General Organisation

II.2 Functional Organisation II.2.1 General Presentation II.2.2 Serial Input / Output Isolation II.2.2.1 Gyro Inputs/Outputs II.2.2.2 Sensors Input II.2.2.3 Repeaters Output II.2.3 Ethernet Links II.2.4 Power Supply II.2.5 Mode Switch II.2.6 Heading Source Selector II.2.7 Serial Repeater Outputs II.2.8 Magnetic Compass Input II.2.9 Fail Safe Compass Connection

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II.2.10 Fluxgate Conversion II.2.11 NAVBox Internal Data II.2.11.1 Data Distribution II.2.11.2 Protocols II.2.11.3 Serial Data Synchronization II.2.12 Computed Output II.2.12.1 Averaging Mode II.2.12.2 Ethernet Conversion Mode II.2.13 Runtime Counter II.2.14 SD-Card Storage II.2.15 USB Port II.2.16 Ring Connection II.2.17 Run Indicator II.2.18 Alarms II.2.18.1 Detail Alarms II.2.18.2 Group Alarms II.2.18.3 Alarm Configuration File II.2.19 Status Outputs II.2.19.1 External Alarm Output II.2.19.2 Alarm Buzzer Output

II.3 Normal Operation Status II.3.1 PCB1 Interface Board II.3.2 PCB3 Syncho Board (Option) II.3.3 U1 Ethernet Switch II.3.4 U2 Ethernet Switch (Option)

III INSTALLATION

III.1 Mechanical Installation

III.2 Electrical Installation III.2.1 Cabinet Earth III.2.2 Cables III.2.3 Cable Glands Positions III.2.4 Fluxgate Installation

IV USE

IV.1 Setting To Work

IV.2 Configuration IV.2.1 Hardware Configuration IV.2.1.1 PCB1 Interface Board IV.2.1.2 PCB3 Synchro Board IV.2.2 Configuration of the Software (MMI) IV.2.2.1 Environment and versions IV.2.2.2 Access to Menus IV.2.2.3 NAVBox Config IV.2.2.4 External Sensors Config

IV.3 Implementation IV.3.1 Procedure to Start the System IV.3.2 Procedure to Stop the System IV.4 Use in Operational Mode IV.4.1 General Use of the MMI IV.4.2 Main Data Page

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IV.4.2.1 Left Side Data IV.4.2.2 Right Side Data IV.4.2.3 Simulation / Quay Mode IV.4.3 Display Data Page IV.4.4 Manual Data Page IV.4.4.1 Manual Position and Speed IV.4.4.2 Simulation IV.4.4.3 Data Logger IV.4.5 Alarm Page IV.4.6 Setup Menu Page IV.4.6.1 Presentation IV.4.6.2 Configurations Management IV.4.6.3 Configuration Setup IV.4.7 Automatic / Manual Heading Source Selection IV.4.7.1 Manual Selection IV.4.7.2 Automatic Switch-Over IV.4.8 User Modes (Password Login) IV.4.9 Runtime Counter and Software Version IV.4.10 MMI Communication Errors IV.4.11 MMI Interface with OCTANS

V MAINTENANCE

V.1 Preventive Maintenance V.1.1 Presentation V.1.2 Tests and Checking V.1.3 Cleaning

V.2 Corrective Maintenance V.2.1 Troubleshooting V.2.2 Alarms Reported by the MMI V.2.3 Miscellaneous Problems V.2.4 Removal/Installation V.2.4.1 Mother Board V.2.4.2 Daughter Board (Option) V.2.4.3 Rejection Filter

VI PARTS LIST

VII WIRING

VII.1 Internal Wiring

VII.2 External Connections

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List of Figures

Figure 1 – NAVBox - Presentation Figure 2 – NAVBox– External presentation Figure 3 –NAVBox – Internal presentation Figure 4 – NAVBox connection Figure 5 – NAVBox overall dimensions Figure 6 – Connectors position – Sensors, daughter board and UPS/GYRO Figure 7 – Connectors position – Repeaters outputs Figure 8 – Connectors position – Signals and power outputs Figure 9 – Ethernet connectors pin numbers (detail) Figure 10 – Digital input connection Figure 11 – RS232 serial input connection Figure 12 – RS422 serial input connection Figure 13 – RS232 serial output connection Figure 14 – RS422 serial output connection Figure 15 – RS232 repeater output connection Figure 16 – RS422 repeater output connection Figure 17 – Schematic overview of the NAVBox inputs/outputs Figure 18 – Detailed overview of the serial signal distribution Figure 19 – Isolation detail of the gyro Inputs/outputs Figure 20 –Isolation détail of the sensors RS422 imputs Figure 21 – Isolation detail of the repeaters RS422 outputs Figure 22 – Single Ethernet link Figure 23 – Extended Ethernet link (in option) Figure 24 – Distribution of power supply Figure 25 – Fail safe compass connection (Watchdog) Figure 26 – Fluxgate signals Figure 27 – Internal data distribution Figure 28 – Average value computation for heading Figure 29 – Computed output with heading source selector Figure 30 – Redundant ring Figure 31 – Buzzer output with single alarm acknowledge Figure 32 – Buzzer output with multiple alarms before acknowledge Figure 33 – LEDs lay-out on the PCB1 board Figure 34 – LEDs lay-out on the PCB3 board Figure 35 – LEDs lay-out on the U1 Ethernet switch Figure 36 – LEDs lay-out on the U2 Ethernet switch Figure 37 – Mandatory service space for the box (Top view) Figure 38 – Different possibilities of NAVBox attachment Figure 39 – Screen termination

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Figure 40 – Identification and location of the cable glands Figure 41 – Fluxgate signal Figure 42 – DIP switches lay-out on PCB1 (folio 1/2) Figure 43 – DIP switches lay-out on PCB1 (folio 2/2) Figure 44 – DIP switches and jumpers lay-out on PCB3 Figure 45 – Setting the IP address Figure 46 – Setting the internal data Figure 47 – Setting the status outputs Figure 48 – Setting the alarm buttons Figure 49 – Setting the computed oputput Figure 50 – Setting the Gyro 1 parameters Figure 51 – Setting the Gyro 2 parameters Figure 52 – Setting the magnetic compass parameters Figure 53 – Setting the fluxgate compass parameters Figure 54 – Setting the Synchro/stepper box parameters Figure 55 – Setting the UPS parameters Figure 56 – Setting the repeater outputs Figure 57 – Options displayed by the main menu Figure 58 – Main data page of the MMI Figure.59 – Main data page items (left side) Figure 60 – Main data page- Mode selection Figure 61 – Main data page- Heading source selection in manual mode Figure 62 – Main data page- Heading difference alarm setings Figure 63 – Main data page- LOG mode selection Figure 64 – Main data page items (right side) Figure 65 – Click area for the dial heading selection Figure 66 – Alarm buttons Figure 67 – Selected gyro (Gyro 1) in simulation/quay mode Figure 68 – Not selected gyro (Gyro 1) in simulation/quay mode Figure 69 – Display data page of the MMI Figure 70 – Manual data page of the MMI Figure 71 – Check boxes for position and speed values Figure 72 – Check boxes forsimulation values Figure 73 – Alarm page of the MMI (one alarm acknowledged and one new (blinking)) Figure 74 – Alarm page of the MMI (both alarms acknowledged) Figure 75 – Set-up menu page of the MMI – Interface box Tab Figure 76 – Set-up menu page of the MMI – External sensors Tab Figure 77 – Configuration management ribbon Figure 78 – Rejection /confirmation before manual switch-over Figure 79 – Rejection /confirmation before automatic switch-over Figure 80 – Login dialog

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Figure 81 – Change password dialog Figure 82 – Command not allowed for the current user mode Figure 83 – Command allowed for the current user mode Figure 84 – Software versions and runtime counter Figure 85 – MMI communication error with the selected Gyro Figure 86 – MMI communication error with the unselected Gyro Figure 87 – NAVBox Test installation Figure 88 – Internal box diagram Figure 89 – Sensors and gyros data – Power supply - Repeater outputs Figure 90 – Ethernet Figure 91 – Synchro Stepper Figure 92 – Inputs and power connection (PCB 1 & 2) Figure 93 – Outputs repeaters and statuses connection (PCB1) Figure 94 – Ethernet connection (PCB1) Figure 95 – Synchro connection (Optional PCB3)

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List of Tables

Table 1 – Power consumption of the NAVBox Table 2 – Digital status/Alarm inputs Table 3 – Source selection condition Table 4 – Available protocols Table 5 – Time-out value for message synchronization Table 6 – Computed Output Heading Table 7 – Statuses of the run indicator Table 8 – List of the detail alarms Table 9 – List of board errors Table 10 – List of the group alarms Table 11 – List of status output assignment Table 12 – Data given by the PCB1 board LEDs Table 13 – Data given by the PCB3 board LEDs Table 14 – Data given by the U1 Ethernet switch LEDs Table 15 – Data given by the optional U2 Ethernet switch LEDs Table 16 – Functionalities of the cable glands numbers Table 17 – DIP switches configuration on PCB1 Table 18 – Other switches configuration on PCB1 Table 19 – Jumpers configuration on PCB1 Table 20 –DIP switches and jumpers configuration on PCB3 Table 21 –Possible output modes for PCB3-SW5 Table 22 –Possible output ratio for PCB3-SW6 Table 23 –Possible output modes for PCB3-SW7 Table 24 –Possible input ratio for PCB3-SW8 Table 25 – Parameters for terminal’s IP configuration Table 26 – Parameters for NAVBox IP configuration Table 27 – Parameters for NAVBox internal data Table 28 – Parameters for status outputs Table 29 – Parameters for alarm buttons configuration Table 30 – Parameters for alarm buttons configuration Table 31 – Parameters for computed output Table 32 – Parameters for Gyro 1 IP config Table 33 – Parameters for Gyro 1 data Input port A Table 34 – Parameters for Gyro 1 data input port B Table 35 – Parameters for Gyro 1 data input port B Table 36 – Parameters for gyro 2 IP config Table 37 – Parameters for gyro 2 data input port A Table 38 – Parameters for gyro 2 data input port B Table 39 – Parameters for Gyro 1 data input port B

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Table 40 – Parameters for the magnetic compass Table 41 – Parameters for the fluxgate compass Table 42 – Parameters for synchro/stepper box Table 43 – Parameters for UPS Table 44 – Parameters for repeater outputs Table 45 – Functionality of the options displayed by the main menu Table 46 – Details of the main data page items (left side) Table 47 – Selectable heading sources for comparison Table 48 – Details of the main data page items (right side) Table 49 – Details of the display data page items Table 50 – Manual position and speed values Table 51 – Data logger items Table 52 – Alarms presentation Table 53 – Main menu buttons of the alarm page Table 54 – Automatic switch-over options Table 55 – Definition of the users’ rights Table 56 – Actions on the password Table 57 – NAVBox Troubleshooting

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Text Usage and Icons bold Bold text is used for items you must select or click in the software. It is also used for the field names used into the dialog box.

Courier Text in this font denotes text or characters that you should enter from the keyboard, the proper names of disk Drives, paths, directories, programs, functions, filenames and extensions.

italic Italic text is the result of an action in the procedures.

The Note icon indicates that the following information is of interest to the operator and should be read.

Important

THE IMPORTANT MENTION INDICATES THAT THE FOLLOWING INFORMATION SHOULD BE READ TO

FORBID OR PREVENT A PRODUCT DYSFUNCTION OR A FAULTY OPERATION OF THE EQUIPMENT

THE CAUTION ICON INDICATES THAT THE FOLLOWING STATEMENT/CONDITION/PROCEDURE MUST

BE READ AND OBSERVED IN ORDER TO PREVENT PARTIAL DAMAGE TO COMPLETE DESTRUCTION

OF THE PRODUCT.

THE WARNING ICON INDICATES THAT THE FOLLOWING STATEMENT/CONDITION/PROCEDURE MUST

BE STRICTLY OBSERVED IN ORDER TO PREVENT POSSIBLE INJURY OR DEATH OF PERSONNEL.

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Abbreviations and Acronyms

AC Alternating Current

CDU Control Display Unit

CEP Circular Error Probability

CGI Common Gateway Interface

DGPS Digital Global Positioning System

DIP Dual In-line Package

DC Direct Current

EFT Electrical Fast Transient

EMC ElectroMagnetic Compatibility

EMLOG ElectroMagnetic Log

HC Heading – Magnetic Compass

HE Heading – North Seeking Gyro

HDG Heading – Deviation & Variation

HDM Heading – Magnetic

HDT Heading – True

ICCB Interface Conversion and Communication Box

IMO International Marine Organisation

INS Inertial Navigation System

LED Light-Emitting Diode

MMI Man Machine Interface

NC Normally Closed

NMEA National Marine Electronics Association

NO Normally Open

PCB Printed Circuit Board

SD-card Secure Digital-card

SFP Small Form-factor Pluggable

UPS Uninterruptible Power Supply

USB Universal Serial Bus

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General Presentation

This document is the User Manual and the Maintainer Manual for the NAVBox.

It describes the functionalities for a NAVBox completely equipped. If a functionality could be missing (not installed) for a dedicated use of the NAVBox, this functionality is presented as optional in the manual.

THIS PARAGRAPH MUST BE READ BEFORE OPENING THE BOX.

The NAVBox uses 24 VDC as power supply. This is a safe voltage.

If an optional daughter board is placed there could be a dangerous voltage present in the cabinet. If the daughter board is a synchro board then in the most cases the reference and synchro voltages are above the level of safe voltage (115 VAC reference and 90 VAC signal).

In this case the Generic NAVBox will have an additional warning label at the cabinet door and also inside. After switching off the input power some parts might still contain a dangerous voltage. The areas with parts concerning this are indicated by the following warning label:

These voltages are supplied from external equipment. Disconnecting the 24 VDC input power will not disconnect the reference voltage and synchro signal voltage. It is strongly recommended to switch off the incoming reference voltages and synchro signal voltages before opening the cabinet.

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I DESCRIPTION

I.1 Presentation

I.1.1 GENERAL PRESENTATION

The NAVBox is a distribution unit that collects data from gyrocompass, magnetic compass, GPS, and several other sensors useful for navigation information. It provides the collected data to repeaters, ECDIS, and other equipment able to use heading, roll and pitch information from a gyrocompass or an inertial navigation system.

The NAVBox looks like a rectangular box (see Figure 1), equipped with:

• Cable glands on its bottom face

• A luminous indicator on its front face.

The NAVBox is closed by a door that can be locked and secured by mean of a removable handle.

Figure 1 – NAVBox - Presentation

This interface box has to be associated with one or more external set-up terminal (like a laptop or a CDU provided by iXBlue, for example) to configure its parameters and to ensure the maintenance of the equipment.

The terminals are connected to the NAVBox by mean of an Ethernet network.

The number of terminals is limited to 4.

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Important

IN NO CASE, TERMINALS MUST BE USED AS REPEATERS. THESE TERMINALS ARE DEDICATED TO

SET-UP AND MAINTENANCE OPERATIONS AND SHOULD NOT BE USED TO PROVIDE NAVIGATION

DATA.

I.1.2 EXTERNAL DESCRIPTION

Outside (see Figure 2), the NAVBox has:

• On the front face :

A luminous indicator LP1 (rep.1), blue colour, showing the status of the NAVBox

A twist locker, equipped with a removable handle (rep. 4)

An identification label (rep. 2)

• On the bottom face :

Thirty four cable gland (rep.3), described in details in a specific paragraph (see

§ I.1.4)

A ground terminal, consisting of threaded rod, equipped with nuts and washers

Figure 2 – NAVBox– External presentation

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I.1.3 INTERNAL DESCRIPTION

Inside (see Figure 3), the box has the following equipments:

• Three electronic boards (PCB), insuring their own functionality:

Board PCB1, mother board

Board PCB2, 24 VDC common mode filter (rejection filter)

Board PCB3, daughter board (optional), that can be a functionality extension of the mother board or a converter:

- Digital/Resolver + Synchro (115 V/6,8 V/90 V/400 Hz)

- Synchro/Digital (to input a Speedlog from synchro equipment, for nexample)

• An Ethernet switch U1, 8 ports + 2 SFP, 1 Gbits

• An Ethernet switch U2, 16 ports, (optional)

Figure 3 –NAVBox – Internal presentation

The location of the connectors of the mother board is detailed in the chapter

“CONNECTIONS” (refer to § I.2.5).

The location of the adjustable or programmable elements is presented in details in a specific paragraph dedicated to the setting and the programming of the printed boards

(refer to § IV.2.1).

Optional

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I.1.4 CONNECTING PLATE

The box has a removable connecting plate. The electrical glands are attached to this plate.

The connection of the NAVBox is ensured by mean of (see Figure 4):

• 25 M16 cable glands

• 5 M20 cable glands

• 2 M25 cable glands

• 2 M32 cable glands

The figure below (see Figure 4), present the lay-out of the electrical glands on the connectors plate. The location of the glands on the connecting plate depends of the position of the connectors on the mother board and takes in account the diameter of the cables that carry data to/from the interface board.

Figure 4 – NAVBox connection

Depending on functionalities managed by the box, all electrical glands are not systematically used.

The location and the functionality of each electrical gland is detailed in the chapter

“INSTALLATION” (Refer to § III.2.3).

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I.2 Technical Characteristics

I.2.1 MECHANICAL CHARACTERISTICS

The main mechanical characteristics (see Figure 5) of the NAVBox are the following:

• Dimensions : 380 x 600 x 210 mm (without mounting brackets)

• Weight : 19 kg

• Fixing : 4 screws CHC M6x12

• Earth connection : M6 bold

Figure 5 – NAVBox overall dimensions

I.2.2 ELECTRICAL CHARACTERISTICS

The main electrical characteristics are the following:

• Power supply : 20 – 32 VDC

• Max consumption : 42 W

• Total output power* : 300 W * Note*: Sum of output powers for the repeaters, gyros, fluxgate and panel PCs.

Table 1 – Power consumption of the NAVBox

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Power consumption box Power Remark

Standard NAVBox 18 W

Extended Ethernet option 9 W Additional to standard NAVBox

Synchro board 3 VA option 15 W Additional to standard NAVBox

I.2.3 IEC 60945 CONFORMITY

The NAVBox is qualified according to the IEC 60945 “Protected Equipment” standard.

I.2.3.1 Environental characteristics

The Operating temperature is between -25 ºC and +55 ºC.

The NAVBox is compatible with the clause 8.3 (Damp heat) of the IEC 60945 standard. Its performance is 10 – 16 hours at +40 °C and 93 ± 3% RH.

The NAVBox is compatible with the clause 8.12 (salt mist) of the IEC 60945. Its performance is 165 hours, 5% NaCl at 40 °C.

I.2.3.2 EMC

The NAVBox meets the requirements of the IEC 60945 for protected equipment category in term of Eledctromagnetic Emission and Susceptibility. (refer to the certificate for the standard version).

I.2.3.3 Vibrations

The NAVBox meets the requirements of the IEC 60945 for protected equipment category.

I.2.3.4 Shocks

The NAVBox meets the requirements of the IEC 60945 for protected equipment category.

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I.2.4 INPUTS – OUTPUTS

I.2.4.1 Serial Compass

Connection Specification Remarks

Data input • RS422/232 DIP-switch selectable

• 120 Ω termination DIP-switch selectable

• 480 kbds max

• Isolated (1 kVDC test voltage)

I.2.4.2 Fluxgate Compass

Connection Specification Remarks

Signal input • DC Sine/Cosine signal relative to reference level ± 1.5 V to ± 4 V

• Reference level 0-10 V against Gnd connection

For a valid conversion either the Sine or Cosine absolute voltage must be > 1 V against reference

12 VDC Output • 12 VDC 0.5 A max Short circuit proof

Power supply for fluxgate compass

I.2.4.3 Gyros

Two connections are available with the following characteristics each:

Connection Specification Remarks

Ethernet • 10/100 Mbs

Data inputs (x3) • RS422/232 DIP-switch selectable

• 120 Ω termination DIP-switch selectable

• Isolated (1 kVDC test voltage)

Data outputs (x3) • RS422/232 DIP-switch selectable

• 480 kbds max

• Isolated (1 kVDC test voltage)

• Short circuit protected

Routing only from

DGPS,

EMLOG or Spare input

24 VDC Output • Output voltage equal to box supply voltage, 1.6 A fused

The magnetic compass serial inputs and outputs are not individually isolated. The inputs and outputs are at gyro level isolated. There is no common ground path between the gyros itself or between the gyros and other sensor inputs or the interface board.

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I.2.4.4 Sensors (DGPS, EMLog...)

Three connections are available with the following characteristics each:

Connection Specification Remarks

Ethernet • 10/100 Mbs

Data input • RS422/232 DIP-switch selectable

• 120 Ω termination DIP-switch selectable

• 480 kbds max

• Isolated (1kVDC test voltage)

Routing only to gyro

I.2.4.5 External Data

UPS

Data input

• RS422/232

DIP-switch selectable

• 120 Ω termination DIP-switch selectable

• 480 kbds max

• Isolated (1 kVDC test voltage)

RS422/RS232 selector is the same for input and output (Future use)

UPS

Data output

• RS422/232

DIP-switch selectable

• 480 kbds max

• Isolated (1 kVDC test voltage)

• Short circuit protected

RS422/RS232 selector is the same for input and output (Future use)

UPS/GYRO

Digital inputs (x2)

• Not isolated, only for potential free contact.

• Contact voltage equal to box supply voltage.

• Contact current 10 mA@24 V

UPS/GYRO Status 1 and UPS Status 2 inputs

I.2.4.6 Repeaters

16 repeater connections are present with the following specification:

Connection Specification Remarks

Ethernet • 10/100 Mbs Repeater 3 to 16 only with extended Ethernet option

Serial outputs • RS422/232 DIP-switch selectable

• Isolated

• Short circuit protected

Repeater 1 to 4 have direct fail safe connection to the compass input (no RS422/ 232 selection possible in this case) voltage, 1.6A fused

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I.2.4.7 Synchro/Stepper Box

Connection Specification Remarks

Data output • RS422/232 DIP-switch selectable

• 120 Ω termination DIP-switch selectable

• 480 kbds max

• Isolated (1kVDC test voltage)

• Short circuit protected

Control bus • RS485

• Not Isolated

• Short circuit protected

Control bus protocol not implemented, only (Future use only)

Digital input • Not isolated, only for potential free contact.

• Contact voltage equal to box supply voltage.

• Contact current 10 mA@24 V

General alarm input

I.2.4.8 Status Outputs

5 status outputs are present.

Connection Specification Remarks

Status outputs • Potential free change-over contact

24 VDC / 2 A

Configurable from the configuration page of the MMI

I.2.4.9 Panel PC

Ethernet • 10/100 Mbs voltage, 4 A fused

I.2.4.10 Optical Ring

2 x Ethernet • 1 Gbs through SFP port SFP port requires additional SFP transceiver

The total number of Ethernet ports is 24. For external equipment a total of 21 Ethernet ports is available (1 port is used for the Interface main board and 2 ports are used for the interconnection between the Ethernet switches).

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I.2.5 CONNECTIONS

The max and min values that are mentioned under the number of the connector in the following tables are the values of the max and min wire section acceptable by the pins of the connector, WITHOUT FERRULES

I.2.5.1 External Box Connection

• Power Supply

Connector Name Terminal Signal I/O

PCB2-J1

Max = 6 mm² Min = 0.2 mm²

Supply 1 24 V

I 2 0 V

• Sensors

Connector Name Terminal Signal I/O

J1: Sensor A

J10: Sensor B J18: Sensor C

Max = 1.5 mm² Min = 0.2 mm²

Data input

1 A / Rx

I 2 B

3 SGnd *

* SGnd is isolated against all other grounds

• Magnetic compass

J84 Max = 1.5 mm² Min = 0.2 mm²

Data input

1 A / Rx

I 2 B

3 SGnd *

• Fluxgate Compass

J65 Max = 1.5 mm² Min = 0.2 mm²

Fluxgate input

1 12 V O

2 Gnd

3 Ref

I 4 Sin

5 Cos

On the filter board

On the main board

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• Gyros

Connector Name Terminal Signal I/O

J60: Gyro 1 J61: Gyro 2 Max = 2.5 mm² Min = 0.5 mm²

Supply

1 24 V

O

2 0 V

J33: Gyro 1 J48: Gyro 2 Max = 1.5 mm² Min = 0.2 mm²

Data input A 1 A / Rx

I 2 B 3 SGnd *

Data input B 4 A / Rx

I 5 B 6 SGnd *

Data input C 7 A / Rx

I 8 B 9 SGnd *

10 NC

J26: Gyro 1 J41 : Gyro 2 Max = 1.5 mm² Min = 0.2 mm²

Data output A 1 A / Tx

O 2 B 3 SGnd *

Data output B 4 A / Tx

O 5 B 6 SGnd *

Data output C 7 A / Tx

O 8 B 9 SGnd *

• External Data

J55 Max = 1.5 mm² Min = 0.2 mm²

UPS Data

1 A / Rx O

2 B 3 A / Tx

O 4 B 5 SGnd *

UPS/GYRO Status input 1 6 In 1 I

UPS Status input 2 7 In 2 I

8 Gnd

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• Repeater 1 to 16 See the table associated to the table hereafter for connector number Jxx

Connector Name Terminal Signal I/O

Jxx Max = 2.5 mm² Min = 0.2 mm²

Supply 1 24 V

O 2 0 V

Serial Data 3 A / Tx

O 4 B 5 SGnd *

Jxx Max = 1.0 mm² Min = 0.2 mm²

Ethernet + Power

1 Rx+

I/O

2 Rx- 3 Tx+ 4 24 V 5 24 V 6 Tx- 7 0 V 8 0 V 9 Shield 10 Shield

Repeater Serial data connector

Ethernet + Power connector

Internal patch connector

1 J66 J42 J43 2 J67 J49 J50 3 J68 J7 J6 4 J69 J14 J13 5 J70 J22 J21 6 J71 J31 J28 7 J72 J38 J37 8 J73 J45 J44 9 J74 J52 J51

10 J75 J8 J9 11 J76 J15 J16 12 J77 J23 J24 13 J78 J32 J29 14 J79 J39 J40 15 J80 J46 J47 16 J66 J42 J43

• Synchro / Stepper Box

J62 Max = 1.5 mm² Min = 0.2 mm²

Data output 1 A / Tx

O 2 B 3 SGnd *

Control bus 4 A

I/O 5 B 6 Gnd

General alarm input 7 In I 8 Gnd

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• Status Outputs

Connector Name Terminal Signal I/O

J82 Max = 1.5 mm² Min = 0.2 mm²

Status output 1

1 NO

O 2 NC

3 COM

Status output 2

4 NO

O 5 NC

6 COM

Status output 3

7 NO

O 8 NC

9 COM

J83 Max = 1.5 mm² Min = 0.2 mm²

Status output 4

1 NO

O 2 NC

3 COM

Status output 5

4 NO

O 5 NC

6 COM

• Panel PC

J58 Max = 2.5 mm² Min = 0.5 mm²

Supply 1 24 V

O 2 0 V

• Ethernet Patch Connectors Without Power (5x) See the table associated to the table hereafter for connector number

Connector Name Terminal Signal I/O

Jxx Max = 1.0 mm² Min = 0.2 mm²

Ethernet

1 Rx+

I/O

2 Rx- 3 Tx+

4 NC

5 NC

6 Tx-

7 NC

8 NC

9 Shld

For connection of Gyro 1, Gyro 2 and CDU, and also for external sensor (DGPS or EMLog for example)

Ethernet patch Ethernet connector Internal patch connector

1 J4 J5 2 J11 J12 3 J19 J20 4 J30 J27 5 J35 J36

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I.2.5.2 Internal Box Connections

J56: Switch 1

J57: Switch 2

Max = 1.5 mm² Min = 0.2 mm²

Supply 1 24 V

O 2 0 V

Status contact 3 Status

I 4 Gnd

J2 Max = 1.5 mm² Min = 0.2 mm²

Run LED 1 Anode

O

2 Kathode

J63 Max = 2.5 mm² Min = 0.5 mm²

Supply 1 24 V

O 2 0 V

J64 Max = 1.5 mm² Min = 0.2 mm²

Control bus

1 A

I/O 2 B

3 Gnd

Ethernet Switches

Run LED

Daughter Board (PCB 3, optional)

MU–BINTGEN–AN-001 Ed. D – July 2015 29

I.2.5.3 Connectors Position on PCB1

J1 Sensor A Input

J10 Sensor B Input J18 Sensor C Input

J33 Gyro 1 Input A / B / C

J26 Gyro 1 Output A / B / C

J55 UPS / Status Gyro

J62 Synchro / Stepper

J84 Compass input

J65 Fluxgate

= Pin 1

J48 Gyro 2 Input A / B / C

J41 Gyro 2 Output A / B / C

J64 Daughter board control busJ82 / J83 Status outputs

J63 Daughter board supply

Figure 6 – Connectors position – Sensors, daughter board and UPS/GYRO

MU–BINTGEN–AN-001 Ed. D – July 2015 30

Figure 7 – Connectors position – Repeaters outputs

Figure 8 – Connectors position – Signals and power outputs

MU–BINTGEN–AN-001 Ed. D – July 2015 31

Figure 9 – Ethernet connectors pin numbers (detail)

I.2.5.4 Connection Details

The mounting for the digital status/alarm inputs is shown in the scheme below (see Figure

10)

It applies to the inputs listed in the following table (see Table 2):

Table 2 – Digital status/Alarm inputs

Name Input Remarks

External Status 1 input UPS or GYRO depending on configuration.

Status 2 input Always UPS

Synchro / stepper box General alarm input

Ethernet switch1 Status input Internal box connection

Ethernet switch 2 Status input Internal box connection

24VDC

Interface board

VCC

Processor

Gnd

Gnd

Dry contact

In

Gnd

Figure 10 – Digital input connection

The digital inputs are suitable for potential free (dry) contacts. The contact must be suitable for currents as low as 10 mA @ 24 VDC. If the contact is not specified for low currents there is a potential risk of bad contact due to oxidation.

Digital Status/ Alarm Inputs

MU–BINTGEN–AN-001 Ed. D – July 2015 32

The mounting shown in the following scheme (see Figure 11) applies to all RS232 serial input connections.

RS232

TTL

RS232

transmitter

SGnd

A/Rx

SGnd

B

Tx

Interface board

EMC glands

Figure 11 – RS232 serial input connection

The mounting shown in the following scheme (see Figure 12) applies to all RS422 serial input connections.

RS422

TTL

RS422

transmitter

SGnd

A/Rx

SGnd

B

A

Interface board

Gnd

B

Figure 12 – RS422 serial input connection

RS232/RS422

Serial Inputs

MU–BINTGEN–AN-001 Ed. D – July 2015 33

The mounting shown in the following scheme (see Figure 13) applies to all RS232 serial outputs

RS232

TTL

RS232

receiver

SGnd

A/Tx

SGnd

B

Rx

Interface board

Figure 13 – RS232 serial output connection

The mounting shown in the following scheme (see Figure 14) applies to all RS422 serial outputs

RS422

TTL

RS422

receiver

SGnd

A/Tx

SGnd

B

A

Interface board

Gnd

B

Figure 14 – RS422 serial output connection

Serial

Outputs

MU–BINTGEN–AN-001 Ed. D – July 2015 34

The mounting shown in the following scheme (see Figure 15) applies to all RS232 repeater outputs

RS232

TTL

RS232

Repeater

SGnd

A/Tx

SGnd

B

Rx

Interface board

Gnd

24V

0V -

Figure 15 – RS232 repeater output connection

The mounting shown in the following scheme (see Figure 16) applies to all RS422 repeater outputs

RS422

TTL

RS422

Repeater

SGnd

A/Tx

SGnd

B

A

Interface board

Gnd

B

24V

0V -

Figure 16 – RS422 repeater output connection

Repeaters

Outputs

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II OPERATION

II.1 General Organisation The input/output signals managed by the NAVBox are detailed in the figure below (see

Figure 17).

The input signals are digital signals (RS232/422 and RS485) or analog signals (sin/cos).

The output signals are digital signals (RS232/422 and RS485).

Figure 17 – Schematic overview of the NAVBox inputs/outputs

MU–BINTGEN–AN-001 Ed. D – July 2015 36

II.2 Functional Organisation

II.2.1 GENERAL PRESENTATION

The NAVBox is configured according to the schematic diagram presented in the figure below (see Figure 18).

It consists of a mother board (interface board) equipped with a processor that manages the data inputs and outputs. If necessary, a daughter board can optionally be fitted to manage additional digital inputs/outputs. In option to, a synchro/resolver board (synchro stepper box) can be fitted in the box to manage analog signals.

RSxx2

RSxx2

Processor

Compass

RSxx2

RSxx2

Compass

Gyro 1A

Gyro 2A

RSxx2

RSxx2

RSxx2

RSxx2

RSxx2

Fail safe connection to compass for repeater output 1-4

Source selection for each output individual

A

B

RSxx2

RSxx2

RSxx2

RSxx2

Sensor A

(DGPS)

Sensor B (EMLog)

RSxx2

RSxx2

Sensor C (Spare)

RSxx2

C om pa ss

G yr o 1A

G yr o 1 B

G yr o 2A

G yr o 2B

Gyro 1B

Gyro 2B

RS485

Alarm contact (configurable)

General Alarm

RSxx2

Status 1

RSx

TTL

RSx

TTL

RSx

TTL

RSx

TTL

RSxx2

RSxx2

RSx

TTL

TTL

RS485

A

A

A

B

B

B

B

A

C om pu te d

Repeater

Repeater

Repeater

Watch-dog

Interface board

RSxx2 RSx

TTL

Gyro 1

Out B

Out C

In A

In B

In C

Out A

Gyro 1C

Gyro 2C

C

C

C

C

C

RSxx2 Gyro 2

Out B

Out C

In A

In B

In C

Out A

Daughter board (optional)Inputs

Outputs

TTL

TTL

RSx

TTL

RSx

TTL

RSx

TTL

RSx

TTL

RSx

TTL

RSx

TTL TTL

TTL

RSx

TTL

RSx

TTL

RSx

TTL

RSx

TTL

RSx

TTL

Flux gate Sin/Cos

DC

Slide switch for compass or fluxgate

RSx

TTL

Fl ux ga te o ut

A/D

U ar t 1

U ar t 2

U ar t 3

U ar t 4

U ar t 5

Uart 7

Uart 8

U ar t 6

U ar t 1

Status 2

Se le ct

Comp

Comp

Comp

Comp

Synchro/ stepper box

TTL

RSx

TTL

RSx

TTL

RSx

TTL

RSx

Heading source selector

Generic Interface Box

UPS

Input

Input

Input

Figure 18 – Detailed overview of the serial signal distribution

MU–BINTGEN–AN-001 Ed. D – July 2015 37

II.2.2 SERIAL INPUT / OUTPUT ISOLATION

The isolation of the different inputs and outputs is detailed in the following figures.

II.2.2.1 Gyro Inputs/Outputs

The gyro inputs are commonly isolated. The inputs and outputs of one gyro are not isolated against each other. Gyro 1 is isolated to Gyro 2 and both are isolated all other inputs and outputs.

The figure below (see Figure 19) details the isolation of the inputs/outputs for Gyro 1 and

Gyro 2.

There is only one DC/DC converter per gyro, common for all inputs/outputs.

Figure 19 – Isolation detail of the gyro Inputs/outputs

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II.2.2.2 Sensors Input

Each sensor (DGPS, EMLog...) input is individually isolated to al other inputs and outputs.

The following figure (voir Figure 20) presents the isolation of the sensors connected to the

NAVBox inputs by a RS422 serial link.

Each input has its own DC/DC converter.

Figure 20 –Isolation détail of the sensors RS422 imputs

II.2.2.3 Repeaters Output

Each repeater output is individually isolated to all other inputs and outputs.

The following figure (see Figure 21) presents the isolation of the repeaters connected to the NAVBox outputs by a RS422 serial link.

Each output has its own DC/DC converter.

Figure 21 – Isolation detail of the repeaters RS422 outputs

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II.2.3 ETHERNET LINKS

The NAVBox has also a standard Ethernet link single (see Figure 22) or extended, in option (see Figure 23).

Interface board Ethernet switch (8 port + 2x SFP)

Ethernet Repeater

Repeater

Ethernet

Ethernet

Panel PC

Gyro 1

Gyro 2

Ethernet

Ethernet

Ethernet

Interface box Standard configuration

Ethernet Optic fiber

Ethernet Optic fiber

1GBs Ring

EMLOGEthernet

DGPSEthernet

SFP

Figure 22 – Single Ethernet link

MU–BINTGEN–AN-001 Ed. D – July 2015 40

Ethernet EMLog

Interface box Extended configuration

Interface board Ethernet

Repeater

EthernetEthernet switch (16 port)

Repeater

Ethernet

Et he rn et

Ethernet switch (8 port + 2x SFP)

Ethernet Repeater

Repeater

Ethernet

Panel PC

Gyro 1

Gyro 2

Ethernet

Ethernet

Ethernet

Ethernet Optic fiber

Ethernet Optic fiber

1GBs Ring

DGPSEthernet

Figure 23 – Extended Ethernet link (in option)

MU–BINTGEN–AN-001 Ed. D – July 2015 41

II.2.4 POWER SUPPLY

The NAVBox provides the power supply (24 V or 12 V) to related equipment, especially the gyro, the repeaters and the panel PCs that are connected.

The distribution of the power supply to the related equipments is shown in the following figure (see Figure 24).

24V

Repeater

Repeater

Repeater

24V

24V

Gyro 1

Gyro 2

24V

24V

Ethernet switch

8+2SFP

24V

DC

DC

Internal Power supplies

Interface box

Panel PC

DC

DC

Fluxgate compass

12V

Ethernet switch 16 port

External power

24VDC

Filter

Daughter board

12V

24VF

24V

DC

DC

Interface board

5V/3V3

Figure 24 – Distribution of power supply

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II.2.5 MODE SWITCH

The system can be configured to select another gyro if the current selected gyro fails. The gyro selection switch can be set to:

• Manual

In the manual position it’s possible to select the heading source manually. Refer to next paragraph for more details (see § II.2.6).

• Automatic

On a communication time-out or invalid data of the selected source, the system will switch over from the current gyro to the next valid data source.

The order of switching is:

Gyro 1 → Gyro 2 → magnetic compass

Gyro 2 → Gyro 1 → magnetic compass

A source will only be selected as new source if the conditions in the following table are met (see Table 3). Otherwise the source will be skipped and the next source will be selected.

Table 3 – Source selection condition

Source Selection condition

Gyro 1

• - Gyro is enabled in the configuration

• - No communication error

• - In Navigation mode

• - Data valid

Gyro 2

• - Gyro is selected as source in the configuration

• - No communication error

• - In Navigation mode

• - Data valid

Magnetic compass • - Magnetic compass is enabled in the configuration

If it is not possible to find a next valid data source there will be no switch over.

Before the automatic switch-over occurs the MMI will request the operator for validation of heading, roll and pitch values.

This functionality can operate only if, at least, two gyros or a gyro and a magnetic compass are connected to the NAVBox.

• Computed

This mode is detailed in a specific paragraph (see § II.2.12)

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II.2.6 HEADING SOURCE SELECTOR

With the heading source selector the active heading source can be selected from:

• Magnetic compass

• Gyro 1

• Gyro 2

If a gyro or the magnetic compass is not enabled in the configuration, then selection of the corresponding source is not possible.

Before changing the heading source, the MMI will request for validation of heading, roll and pitch values.

II.2.7 SERIAL REPEATER OUTPUTS

The data source of each individual repeater output can be configured.

By default, the repeater output is defined “Not connected”

The available data sources are:

• Data channel A

• Data channel B

• Data channel C

• Computed output

• Permanent MAG

The “Switch channels” are the outputs of the Gyro switch over unit. The data at the computed output is generated by the processor of the NAVBox.

The averaging functionality can operate only if the data coming out from two sources are available in output.

No selection is possible when just one source is connected to the NAVBox.

II.2.8 MAGNETIC COMPASS INPUT

If enabled in the configuration, the NAVBox will monitor the NMEA data at the magnetic compass input. The NMEA protocol can be selected between HDG and HDM (the ID will be ignored). Also the communication parameters can be configured. If the magnetic compass is enabled it can also be used as heading source for the automatic switch over.

The data source for the magnetic compass input can be selected between the on-board fluxgate converter or the external magnetic compass serial input (with slide switch SW23 at the board).

The fluxgate conversion chapter contains the format from the HDG and HDM sentences.

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II.2.9 FAIL SAFE COMPASS CONNECTION

A watchdog checks the correct operation of the main processor. If the main processor fails, the watchdog will switch repeater output 1 to 4 directly to the magnetic compass input (the delay on the switch-over is approximately 1.6 seconds). The repeater outputs are switched with electromechanical small signal relays.

The repeater outputs will also be switched to the magnetic compass signal if the power supply fails.

For the failsafe position the normally closed contacts of the relays are used.

The Fail Safe mounting is given in the following figure (see Figure 25).

Figure 25 – Fail safe compass connection (Watchdog)

Due to the physical connection with relays, there is no isolation possible between the magnetic compass input and the 4 failsafe repeater outputs when the relays are in the failsafe position. Especially with RS232 connections care must be taken (due to the Gnd connections). If the 4 repeater outputs are all loaded with listeners the magnetic compass must be able to drive these 4 loads. For RS232 signals it is recommended to load the magnetic compass with only one RS232 repeater.

Only (isolated) NMEA compatible inputs should be used at the repeater outputs to avoid ground loops in the fail safe situation

MU–BINTGEN–AN-001 Ed. D – July 2015 45

This functionality can operate only if:

• A magnetic compass is connected at the input of the NAVBox and independently powered.

• The repeater outputs 1 to 4 are connected to the equipment and independently powered.

II.2.10 FLUXGATE CONVERSION

The interface board has a dedicated fluxgate connection. This connection provides fused

12 V power supply for the fluxgate. The signal input has three signal lines: sine, cosine and reference. Both sine and cosine signals are DC levels measured against the reference level.

Figure 26 – Fluxgate signals

The fluxgate heading angle α is converted from the sine and cosine input voltages.

For a valid conversion result the absolute value of the Vsin - Vref or Vcos - Vref voltage must be higher than 0.5V. If the absolute value of both of these voltages is < 0.5V at the same time the conversion result is invalid. The range is limited to 4V maximum. If the input signal is above this lever the conversion result not reliable.

The result is converted to a serial NMEA message. This message can be selected as serial magnetic compass source with a slide switch at the interface board. The update rate can be configured. The communication parameters are the same as for the magnetic compass serial input configuration.

The following NMEA sentences can be selected:

• HCHDM

1 2 3

MU–BINTGEN–AN-001 Ed. D – July 2015 46

$--HDM,x.xx,M*hh

1) Heading in degrees, magnétic, 2 décimals

2) M = magnétic

3) Checksum

• HCHDG

1 2345 6

$--HDG,x.xx,,,,*hh

1) Magnetic sensor heading in degrees, 2 décimals

2) Empty

3) Empty

4) Empty

5) Empty

6) Checksum

If the fluxgate conversion is invalid, the NMEA sentence will be sent with an empty heading field.

The Vsin and Vcos input values are averaged over the period between two NMEA output messages. On the 1 Hz rate the input values are averaged over 1 second. At 10 and

100 Hz the averaging period is 100 ms and 10 ms.

The fluxgate interface can be enabled in the configuration. If the fluxgate is disabled no

NMEA message will be output on the fluxgate output and any conversion error due to unconnected fluxgate will be suppressed.

The fluxgate conversion is possible only if magnetic compass data are present at the input.

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II.2.11 NAVBOX INTERNAL DATA

II.2.11.1 Data Distribution

The distribution of internal data is described in the following figure (see Figure 27).

Ethernet

UDP

Input Port G1

Computed Output port

Switch-over unit

Averaging

Ethernet to serial conversion Ethernet

UDP

Input Port G2

RSxx2

RSxx2 Channel 1A

Heading source selector

Computed output mode

(config)

Ethernet

UDP

Data Port G1

RSxx2 Channel 1B

Ethernet

RSxx2

RSxx2

Gyro 1

RSxx2 Channel 2A

Ethernet

UDP

Data Port G2

RSxx2 Channel 2B

Ethernet

RSxx2

RSxx2

Gyro 2

Data source

(MMI

config)

Gyro 1

Gyro 2

Ethernet

Port A

Port B

Ethernet

Port A

Port B

Ethernet

UDP

Output Port

UDP

Ethernet

HEHDT

Ethernet conversion

Computed

Alarm processing

Gyro switch position

Relays S con

Mode switch (MMI main page)

Manual

Auto

CGI (Ethernet only)

ICCB1

Long Bin Nav HR

Phins/Octans Stand.

Magnetic

Gyro 1

Gyro 2

Heading source selector

(MMI main page)

Interface box data

G1

Interface box data

G2

Switched Ethernet data

(unknown protocol)

Compass

CGI (Ethernet only)

ICCB1

Long Bin Nav HR

Phins/Octans Stand.

No data available

Interface box data:

-Heading -Roll -Pitch -Status

Figure 27 – Internal data distribution

The NAVBox internal data is received from both gyros and is used for:

• Switch-over unit

• Computed output calculation (depending on the configuration)

• Alarm management

The data exist of:

• Heading

• Roll

• Pitch

• Status information (data invalid, not in navigation mode)

The data source can be selected in configuration from the following sources:

• Ethernet

• Serial channel A

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The NAVBox will read the selected protocol directly from both gyros serial port A or

Magnetic compass.

• Serial channel B

• The NAVBox will read the selected protocol directly from both gyros serial port B.

• Permanent MAG

• The NAVBox will always send Magnetic compass information no matter wich gyro is active

II.2.11.2 Protocols

For both the Ethernet and serial channels, the protocol can be selected in the configuration. The following protocols are available (see Table 4):

Table 4 – Available protocols

Protocol Remark Data time-out

CGI Only for slow alarm and switch-over response. 10 s

ICCB1 5 s

Long Binary Nav HR 5 s

PHINS standard 5 s

OCTANS standard 5 s

THS-ROT Only for (non-ixblue) other gyro. 5 s

HDT-ROT

Only for (non-ixblue) other gyro.

Gyro status must be provided trough External Status 1 (J55).

5 s

The OCTANS standard protocol is implemented for OCTANS gyros only. Other gyro’s have a different user byte pattern in the OCTANS standard protocol. Attitude data will still be represented correctly if the gyro is a non-OCTANS type.

The protocol can be selected between CGI (low speed applications) and several other protocols. The CGI protocol will not occupy an output port (serial or Ethernet) of the gyro.

For all protocols except CGI the speed of data exchange between the gyro and the

NAVBox depends on the gyro configuration. The CGI communication interval is fixed by the NAVBox to approximately 1 s.

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II.2.11.3 Serial Data Synchronization

To synchronize the serial data reception of the different protocols a character time-out is used. All serial characters of one message must be sent in order without a pause in between. After a pause longer than the time-out value the message is considered to be complete and will be evaluated. The time-out value for message synchronization is as follows:

Table 5 – Time-out value for message synchronization

Baud rate Synchronization time-out

4 800 8.3 ms 9 600 4.2 ms 19 200 2.1 ms 38 400 1 ms 115 200 350 µs 230 400 175 µs

The data length limitation is not applicable to protocols used for Ethernet conversion.

II.2.12 COMPUTED OUTPUT

For the computed output two options are available:

• Averaging mode

• Ethernet conversion mode.

The averaging mode can operate only if data from two different sources are available in output.

II.2.12.1 Averaging Mode

Each individual repeater output can be configured for the averaging mode.In the averaging mode an average value is calculated for heading, roll and pitch. The average value is based on the data of both gyros. The computed values are displayed at the MMI in the Gyro information panel.

The averaged heading, roll and pitch will be computed by the NAVBox processor. The result is used for the computed output and the MMI.

The algorithm for calculating the average value for the heading is given in the figure hereafter (see Figure 28).

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Angle1 = Heading Gyro 1 Angle2 = Heading Gyro 2

Abs (Angle1-Angle2) > 300?

Angle1 > 180?

Angle2 > 180?

Angle1=Angle1-360

Angle2=Angle2-360

Average = (Angle1+Angle2)/2

Average = Average +

Average = (Angle1+Angle2)/2

Average < 0?

Start

End

Figure 28 – Average value computation for heading

The averaged roll and pitch value is calculated by just averaging:

21 RollRollAverageRoll

21 PitchPitchAveragePitch

MU–BINTGEN–AN-001 Ed. D – July 2015 51

The computed heading will also be present at the serial computed output. A standard

HEHDT NMEA sentence is sent:

HEHDT:

1 2 3

$--HDT,xxx.xxx,T*hh

1) Heading Degrees, true

2) T = True

3) Checksum

The heading is sent with three decimals.

On communication time-out or invalid data from one gyro the average value will be based on just one gyro (see Table 6). If both gyros fail, the magnetic compass heading is used at the computed output.

Table 6 – Computed Output Heading

Condition Computed output heading

2 Gyros available Computed (averaged) heading

Communication error Gyro 1 or Data invalid of gyro 1 or Not in navigation mode gyro 1

Heading gyro 2 (during time-out no data, after time-out only gyro 2 data)

Communication error Gyro 2 or Data invalid of gyro 2 or Not in navigation mode gyro 2

Heading gyro 1 (after time-out only gyro 1 data)

Communication error Gyro 1 & 2 or Data invalid of Gyro 1 & 2 or Not in navigation mode gyro 1 & 2

Magnetic compass heading (after time-out only compass data)

II.2.12.2 Ethernet Conversion Mode

In the Ethernet conversion mode, the NAVBox receives a protocol message from the selected Gyro and provides the same message at the serial computed output. There is no modification of the data contents at all. This mode can be used as Ethernet to serial converter to extend the gyro with one physical serial port.

The source of the output data can be Gyro 1 or Gyro 2, depending on the heading source selector. If the magnetic compass is selected there will be no data at the computed output.

In parallel the Gyro 1 or Gyro 2 data is present on the Ethernet UDP output port.

MU–BINTGEN–AN-001 Ed. D – July 2015 52

Figure 29 – Computed output with heading source selector

The heading source selector is a software functionality and not a hardware switch for

Ethernet.

II.2.13 RUNTIME COUNTER

The runtime counter counts the run seconds from power-up. The counter is located at the interface PCB and operates independent of a MMI connection with a PC.

II.2.14 SD-CARD STORAGE

An SD-card for file storage is used at the interface board.

II.2.15 USB PORT

This port is used for service purpose only.

The interface contains an isolated USB device port (USB-B type). This port can be connected to a PC or laptop with a standard USB cable. The port can be used for the following purposes:

• Software updating:

• Web interface updating:

II.2.16 RING CONNECTION

The standard Ethernet switch in the NAVBox has two 1 Gbs ports. Both ports have an

SFP (Small Form-factor Pluggable) slot. Depending on the application an SFP module must be inserted. Several modules are available like 1000BaseT for copper connection and multi/single mode optical fiber modules. The switch can be used in a redundant

Ethernet ring. A dedicated external ring switch is still required for fast recovery of the backup path.

MU–BINTGEN–AN-001 Ed. D – July 2015 53

Figure 30 – Redundant ring

If there is no SFP 1 GBits slot on the Ethernet switch, a communication ring like this one is not possible.

II.2.17 RUN INDICATOR

The blue indicator LP1, at the outside of the box, indicates the status of the system. The following statusses are possible (see Table 7):

Table 7 – Statuses of the run indicator

Status Description

Off The NAVBox is unpowered or the processor is not running.

On The NAVBox is running without alarms.

Slow blinking (1 time/s)

Gyro alarm present.

Fast blinking (10 times/s)

Inferface box alarm present

The blinking frequency depends on the type of active alarm. The alarm type is defined in the alarm configuration file (see § II.2.18.3).

MU–BINTGEN–AN-001 Ed. D – July 2015 54

II.2.18 ALARMS

II.2.18.1 Detail Alarms

The NAVBox can generate the following detail alarms (see Table 8):

Table 8 – List of the detail alarms

Index Alarm Remark

1 Board error: xxxxxxxxx

An internal communication error on the interface board occurred. The interface board will generate the corresponding text for the xxxxxxxxx to indicate the type of error.

2 Board high temperature The temperature sensor at the interface main board has measured a temperature above 85°C

3 UPS Alarm 1 From UPS digital status input 1

4 UPS Alarm 2 From UPS digital status input 2

5 Synchro / stepper general alarm From Synchro / Stepper…