1. Earth-Sea Science Junction Boxes
Monty Priede
Oceanlab
University of Aberdeen
WP9

2. Distributed junction boxes around the array
KM3NeT
Concept
Distributed junction boxes around the array

3. Active Sensors
Acoustic
Optic
KM3NET
Safety Radius
Benign Sensors
only

4. 4-5 km?
KM3NET
Safety Radius 1km

5. The Junction Box Footprint
1km
<100Km

6. 91 Towers Regular Hexagon
Suggested Sea Floor Geometry of KM3NeT
91 Towers Regular Hexagon

7. Suggested Sea Floor Geometry of ES Science Junction boxes
around KM3NeT
A 0 : +2000
B : -1000
B : -1000
1000m
2000m
Safety Radius

8. 800 km loop

9. Neptune-Canada
400V
10kV
10kW

10. MARS Concept (Monterey)

11. MARS – NEPTUNE
Junction Boxes

12. Neptune-Canada Junction Box

13. Neptune-Canada Junction Box
10 individual instrument interfaces Ethernet or serial communication links.
1.5 kW of power to each instrument
Variety of voltages to allow for maximum configurability
switch supply up to 6kW at 400V for high power loads.
The Junction Box connects to the node.
Instruments up to 10 km away from the Node and at depths up to 3000m

14. Tests at Alcatel Greenwich
Neptune-Canada
Junction Box
Oceanworks
Tests at Alcatel Greenwich
September 2008

15. Junction Box (JB) architecture example
Yves Auffret Ifremer
Switch(es)
CoS, QoS, PTP Boundary clock, VLAN, LACP, port Trunk,…
Eth 1000LX (fiber) – 400VDC – NTP/PTP
Eth 1000LX (fiber) – 400VDC – NTP/PTP
Applications: Daisy chain for another JB, power equipments: robotics, vertical profiler… network extension up to 20km
Eth 100BT (copper) – 48VDC – NTP/PTP + PPS/NMEA
Eth 100BT (copper) – 48VDC – NTP/PTP + PPS/NMEA
Node or JB
Extension modules
(up to 4 modules): IP server RS232/422/485, VDSL2 modem…
Applications: Ethernet scientific instruments, ex: Seismometer (OBS), still camera , video, hydrophone, crawler…
RS232/422/485 – 48VDC – PPS/NMEA
Applications: Serial scientific instruments ex: ADCP, piezometer (pore pressure sensor) , seismometer, CTD, chemical analyzer,…
400VDC + Eth 1000LX (fibre)
1 or 2 fibres (fail-over, load balancing,..) Or
400VDC + xDSL (few km network extension)
VDSL2 Modem – 400VDC – NTP/PTP
Applications: Network extension, measurements in water column, instrument or instrument cluster up to 5-6km (low cost extension (vs. fiber), seismic network, acoustic network,…
PTP/IEEE1588 clock client
(PPS + NMEA time code)
Control/command
power supplies – faults detection
Réseaux câblés et systèmes instrumentaux
October 13th, 2008 15 15

16. Neptune-Canada Junction Box

17. 1. Eth 1000LX (fiber) – 400VDC – NTP/PTP Applications:
Daisy chain for another JB,
high power equipment:
robotics, vertical profiler…
network extension up to 20km
Daisy chain
Extension to 20 km

18. Ethernet scientific instruments,
2. Eth 100BT (copper) – 48VDC –
NTP/PTP + PPS/NMEA
Ethernet scientific instruments,
Seismometer (OBS),
still camera ,
video,
hydrophone,
crawler…
<1km

19. Serial scientific instruments
3. RS232/422/485 – 48VDC – PPS/NMEA
Serial scientific instruments
ADCP,
piezometer (pore pressure sensor) ,
seismometer,
CTD,
chemical analyzer,…
<1km

20. 4. VDSL2 Modem – 400VDC – NTP/PTP Network extension,
measurements in water column,
instrument or instrument cluster up to 5-6km
(low cost extension (vs. fiber),
seismic network,
acoustic network,…,…
Up to 5-6km

21. KM3NET Sites 100km radius Potential Footprints
ANTARES- Ligurian Sea
2475 m
NEMO - Ionian Sea
3350m
NESTOR - Ionian Sea
4500/5200m

22. 2km and 12km radius footprints at Pylos

23. Junction box Mechanical Components ROV servicable
Connection to
Network Cable
(In case of failure)
Housing
(In case of failure)
Observatory & Extension
Manifold
Connections
Wet-mateable
(in case of failure –
6 month service interval)
Foundation Frame
(permanent)

24. MARS Concept (Monterey)
Observatories distributed on the sea floor

25. DELOS Concept (Angola) Observatory Modules on a frame
Modules serviced
By ROV every 6 months 8m
25 year life 4m
Mud mat Foundations

26. Neptune-Canada Junction Box The Vertical Profiler System is lowered
into a wet testing tank at NGK Co.
in Saitama Japan, 3 Sept 08

27. Earth-Sea Science Junction Boxes
Key Steps for TDR
Do we take Optical Fibre through to observatories?
Details of wet mateable manifold connectors
Safety of power management- switching loads
ESS data portal