rpc cabling

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Muon Annul ReviewCern 15 September 2003 RPC cabling

RPC cabling

• HV & LV cables• Signal cables

• Position and composition of racks in UXC and USC

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HV cable layout (from UXC55 vs USC55)

Conductor @ 15 KV(DC)with individual insulating sheath

Braided shield

Signal return

Required characteristicCERN safety instruction IS23:•Flame retardant (IEC 60332-3 Cat. C)•Zero halogene (IEC 60754-1)•Smoke density (IEC 61034)•Corrosiveness of combustion gases (IEC 60754-1)•Maximum current per conductor: 500 uA•Maximum voltage per conductor: 15 KV-DC

External sheath

Internal sheath

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HV cables characteristics

• Multiconductor cable 8 x (3x0.22) H2M1 Halogene Free 15 kV cc (from patch panels towards tower to patch panel on USC)– External diameter 26.2 mm (nominal)– Weight (indicative) 826 g/m

• Cable 1 x (3x0.22) H2M1 Halogene Free 15 kV cc (from detector towards patch panels on towers)– External diameter 7.7 mm (nominal)– Weight (indicative) 82 g/m

• Manufacturer: NOVACAVI

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LV cable characteristics

• Cable 12 x 0.75 (RB2/3 case):– Braided shield: copper– External diameter (nominal): 10.1 mm– Weight (indicative): 175 g/m

• Cable 8 x 0.75 (RB2/2 case):– Braided shield: copper– External diameter (nominal): 9.0 mm– Weight (indicative): 156 g/m

• Manufacturer: NOVACAVI

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Signal cable characteristics

• 20 twisted pairs cable• Very low skew cable (1-2 ns between pairs for 25 m max length)• Conductor cross section: 28 AWG• Insulator: PE• Global shield: tinned copper braid• External shield: PE• Total external diameter: 12-13 mm• Rated voltage: 10 V (used for LVDS signal transmission)• Operating temperature: 0°/+60°C• Characteristic impedance: 110 (10%)• CERN safety instruction IS23 compliant:

– Flame retardant (IEC 60332-3 Cat. C)– Zero halogene (IEC 60754-1)– Smoke density (IEC 61034)– Corrosiveness of combustion gases (IEC 60754-1)

• Competitor manufacturers: Kabelwerk EUPEN - NOVACAVI

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Possible cabling layout

Drawn by L. Roscilli

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Barrel RPC: sector cables (except sectors 4-9-10-11)

RB2_OUT

RB2_IN

RB1_OUT

RB1_IN

RB3 RB3

RB4 RB4

6 LV 8 HV

To balconies

12

78 SGN6 DCS

To LBBOX

12

18 (12)

12 (18)

12

12

17p

17p

110p (17p)

17p

17p

Wheel 0, ±1 (Wheel ±2 )

18w

18w

112w (18w)

18w

18w

18w (112w) 17p (110p)

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Barrel RPC: sector cables (sector 4)

RB2_OUT

RB2_IN

RB1_OUT

RB1_IN

RB3 RB3

RB4

7 LV 10 HV

To balconies

12

90 SGN7 DCS

To LBBOX

12

18(12)

12(18)

12

RB4 RB4 RB4


17p

17p

110p (17p)

17p

17p

17p (110p)

17p

18w

18w

112w (18w)

18w

18w

18w (112w)

18w

12

12

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Barrel RPC: sector cables (sector 10)

RB2_OUT

RB2_IN

RB1_OUT

RB1_IN

RB3 RB3

RB4 RB4

7 LV 8 HV

To balconies

12

86 SGN7 DCS

To LBBOX

12

12

10


18w

18w

112w (18w)

18w

18w

18w (112w)

18w

18(12)

12(18)

17p

17p

110p (17p)

17p

17p

17p (110p)

17p

10

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Barrel RPC: sector cables (sectors 9-11)

RB2_OUT

RB2_IN

RB1_OUT

RB1_IN

RB3 RB3

RB4

6 LV 7 HV

To balconies

12

72 SGN6 DCS

To LBBOX

12

12

6


18w

18w

112w (18w)

18w

18w

18w (112w)

18(12)

12(18)

17p

17p

110p (17p)

17p

17p

17p (110p)

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Numbers and lengthsUpdated by F. Montecassiano

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Cables length specification (Wheel 0/ Z-)

updated by L. Roscilli

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Cables length specification (Wheel 0/ Z+)

updated by L. Roscilli

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Rack composition in USC

EASY4000

EASY3000

EASY4000

EASY3000

HV Patch Panel

1. SY1527:9 or 11 A1676 Branch Controllers

1. EASY crates2. HV modules (A3512):

7 modules/crate

Full Option:1020 HV channels

Chamber Option:480 HV channels

Station Option:360 HV channels

170 HV modules25 EASY crates+ 1 SY1527 + 20 HV patch panel



+

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Rack position in USC

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Rack composition in UXC

Calculation per quadrant (Barrel)• 3 LV modules (A3003)/quadrant (6 EASY crate slots)• Current absorption calculations:

– 2 Lbboxes x 13 LBs = 26 LBs– 1 Lbbox x 15 LBs = 15 LBs– 41 LBs/quadrant– Current absorption: 14A/LB (estimation)– 14A x 41 LBs = 574 A/quadrant– We need 6 A3100 CAEN LV module (4 slots width each)– We need a total of 24 slots 1 + 1/5 EASY crates per

tower– This fit with the 2 x 6U crates foreseen for RPC.

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Rack composition in UXC towers

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Conclusions

• We are ready for asking a cable PRR– we are just collecting all necessary documentations

• Before the end of this year we start tenders– this implies to know exactly total lengths

• Open issues:– Cable path (to be approved very soon)

rpc cabling

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