Electronic Systems Support

LHC Crates 2005

Paul HarwoodPH Electronic Systems Support Group (PH-ESS)

MeetingSept 1, 2004

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Introduction LHC crates contract

Supplier - Wiener (Plein & Baus) Gmbh Schedule - Single annual order, 3 fixed

deliveries ESS handles – Contract, Ordering,

Reception, Inspection, Inventory & database, Forwarding and Support.

2004 deliveries Deliveries 1 & 2 complete (32+38 crates) Delivery 3 expected mid Nov (75 crates)

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Technical overview Crate configuration options

6U / 9U Local / Remote PSU Air / Water cooled Standard / Lab variant Backplane options – VME64x, VME64xP, CPCI,

Custom, J3… Other – Fan tray depth, Slot depth, 6U/9U slot

options Communication – CAN as standard, TCP/IP & RS232 Rad/Mag tolerant crates ’05

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Crate configurations6U Remote Local

9U Remote Local

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Crate variations Initial plans were to provide a number of

‘standard’ crates There are now 31 different types of crates &

36 PSU configurations on the inventory For support & administrative reasons it is

necessary that this list does not grow any more

Review the pre-existing options, there is almost certainly a suitable solution

Guidance can be provided of selection of the best solution

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Water-cooling (PSU’s) To date:

Pre-production prototypes evaluated by ESS In collaboration with Wiener, several changes

made to improve reliability & cooling efficiency A few intermediate delivered to users

Have been recalled for the above modification

Considerations Will require care with cooling water

installation to achieve required flow rate (≈1 l/min)

Power supply is ‘shunted’ by rack heat-exchangers

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Water cooling performance

LHC w/c PSU – Cyan & dark violet curves. Note that the number of internal modules affects pressure / flow characteristic.

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Cable management In ‘remote’ PSU configurations, the loom of

DC cables from the PSU to the crate required management, to ensure:

Minimum length (dynamic load requirement) Full access to rear transition area Minimize conflict with experimental cables in the

rack Ensure cables are undamaged by access operations

All remote PSU ‘bins’ will now include cable management (next slide)

Ensure that there are no conflicts with other services (water, experimental cables)

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Cable management

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Cooling A number of instances of Slot 1 (2,3,4) cooling

problems have been seen. ESS\Wiener are investigating methods of mitigating

this classic issue, including: airflow modification, assisted force cooling

In the meantime… All crates are now supplied with Information sheets

giving guidance on a few key aspects. All 9U crates supplied in 2005 onwards will have a

blanking panel fitted to the J3 area, if there is nothing ordered in this position. Users may remove this if required to fit a J3 backplane. This should improve the overall airflow in the crate.

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Rad/Mag tolerant crates

Prototype – 9U, no fan tray, VME64x

PSU water cooled with remote AC/DC & control board

9U LHC Crate

Variant 1Water Cooled Power Supply

766mm

726mm

840mm 1U 726mm

9U

690mm

6Ux160mm Board

6U SUBRACK

POWER SUPPLY

FAN TRAY

J1

RP0 9Ux400mm Board J0 9Ux220mm Board

J2 RP2

WATER COOLED POWER SUPPLY

PowerConnection

AC/DC

6U Control

in crate

Mains

Hostile Safe

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Questions?

Any Technical Questions?

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Ordering for 2005 No major change from 2004 Costs

Updated price list available from October Normal annual increase from Wiener PH-ESS will add a supplement to cover variations in

the CHF/EUR exchange rate and transport (~2%)

Discuss your requirements with Paul Harwood

Technical Information: www.cern.ch/ESS/crateProject/ Delivery schedule (which batch?)

Deliveries in 3 batches May, August and November 2005

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Ordering for 2005 Deliveries

In 2003/4 a considerable number of crates have been forwarded outside CERN, with increasing volumes this will no longer be possible

ESS will only now deliver by Internal Transport Users must arrange their own onward shipping if

necessary

Order amendments Several instances of order amendments have occurred in

2004 This is often expensive, and creates a large workload Please ensure crate orders are correct at the time of

ordering

Spares ESS do not hold spares for crates Each experiment / user should evaluate their needs and

ensure that spares are maintained as necessary

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Timescales (deadlines)

Requirements (Sept - Dec) Discussion of requirements / prices / delivery

Internal orders confirmed (End of Dec) All requirements must be received by this date

Prepayment (January) PH-ESS issue TIDs, which must be approved before order will be placed (by 31st Jan)

External order placed (Feb 1st) PH-ESS issues release order to supplier

Deliveries 12, 24, 36 wks after release order

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Database ESS maintains a database of LHC crates

Used for: Finding crate components / prices Order tracking & delivery information Inventory (bar code labels) & owner info Commercial & technical history Actions recorded:

Order status, delivery date, warranty info, reception, testing, dispatch, fault records, repair….

Users may now access this database http://ess.web.cern.ch/ESS/ and select “LHC crates –

Public” Database is password protected for commercial

reasons, please apply to ESS for access

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Discussion

Any Questions? Any other points to raise?