MVTX AC/DC Power Distribution

Cameron Dean, Ho-San Ko, Ming Liu, Yuan Mei, Yasser Corrales Morales, Michael Peters, Jo Schambach, Zhaozhong Shi, Walter Sondheim

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Nov 15, 2021

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2

Outline

• MVTX Power System Overview
• Rack 2E3
• Mainframe & Reverse Bias supply
• Bulk Power supply
• LV Power supply
• Rack 2E1
• Power Board and Readout Unit
• Cables from 2E3 to 2E1
• Grounding
• Cooling
• Interlock & Safety system

3

Clean & simplify the slides & focus on the concerns.

Use p.9 in various slides to remind people.

4

PP3

PP2

PP1

MVTX rack location: 2E1 & 2E3

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2E1: Power Board and Readout Unit

2E3: CAEN power supplies for Power Board and Readout Unit

1.32 m

12 m

11 m

Patch panel 2

Patch panel 3

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Detail of the cabling between the racks: [2]https://docs.google.com/drawings/d/1_jeF-l10jnqIwcAkbsub0Q9S3dJP-C4aZ1vbrgAuEIc/edit?usp=sharing

208 Vac 3-phase (~1.3kW) & 110 Vac (~800W)

Water cooling for each module

is used in 2E1

Rack 2E3 powers rack 2E1: Problem at 2E1 → 2E3 shuts down power

2E1

2E3

Update: Mar/10/2022

At the bottom, fan from the back will be installed

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2E1

2E3

Quick summary

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EASY3000

stave

stave

stave

stave

stave

stave

...

48 X staves

...

24 X (PB + 2 RU)

= 4 VME crates

LV

12 ch

LV

12 ch

LV

12 ch

LV

12 ch

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EASY3000

LV

12 ch

LV

12 ch

LV

12 ch

LV

12 ch

48 Vdc Bulk Power

Mainframe

controller

RB LV

Rack 2E1

Rack 2E3 (all CAEN)

Interaction Region

high speed data & control

1.8 V, 0.9 A ( dig) & 0.115 A (ana), GND, -3 V, 0.01 A (bias)

PU: 3.3 V, 1.5 A

RB: -5 V, 0.1 A

RU: 7 V, 1.9 A

High voltage:

• 48 Vdc bulk power supply @ 2E3 ← only module receives AC
• 7 Vdc from LV @ 2E3 to RU @ 2E1

CAEN modules (2E3): all non-NRTL. Plan to have inspection when arrive at BNL

all modules and their software have interlock system

Voltage sense: 2E3 - 2E1 (yes), 2E1 - Stave (no)

10.7 m cables

13.32 m cables

RU : Readout Unit

PU : Power Unit

PB : Power Board (2 X PU)

RB : Reverse Bias

LV : Low Voltage

MVTX Readout, Power Overview

9

9 sensors

FPC

Stave

Cold plate

high speed data & control

1.8 V, 1 A (dig) & 0.1 A (ana), GND, -3 V, 0.01 A bias

Readout Unit

Power Unit

I2C

Power Unit (PU) requires power: 3.3 V, 1.5 A

Readout Unit (RU) requires power: 7 V, 1.9 A

Reverse Bias (RB) input to Power Board (PB): - 5 V, 0.1 A

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→ All the power to the PB and RU are supplied by CAEN modules at 2E3.

Interaction Region / Stave

Rack 2E1

Two Power Units constitute one Power Board.

48 staves = 48 Power Units & 48 Readout Units

= 24 Power Board & 48 Readout Units

MVTX Readout, Power Overview

10

Readout Unit

PTC fuse: 10 A

Power Unit

PTC fuse: 1.1 A (RB)

10 A (PU)

Power Unit (PU) requires power: 3.3 V, 1.5 A

Readout Unit (RU) requires power: 7 V, 1.9 A

Reverse Bias (RB) input to Power Board (PB): - 5 V, 0.1 A

→ All the power to the PB and RU are supplied by CAEN modules at 2E3.

→ Problem at 2E1 ⇒ 2E3 shuts down

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Rack 2E1

3.3 V, 1.5 A*

7 V, 1.9 A

Rack 2E3: CAEN + fans

A3486 48 Vdc Bulk Power

2 ch

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208Vac-48Vdc converter.

max input 5kW (3 X 25 A ext. fuse required)

(5 X 4mm2 cable: 33 A @ 440 V rated)

(2 A Fuse for service)

max output 4kW (one ch)

max output 2kW (two ch) : 10 AWG used

SY5527 Mainframe

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Houses A1676A & A2518

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110Vac input

max input 20 A (Fuse)

Max output 550 W

A2518: RB to PB

8 floating ch. 3~8 V. max 10 A. or max 50 W.

A1676A: controls A3009B/EASY3000 & A3486

CAEN: Programmable voltage & current limit

A3009B: trimmer to set hardware threshold

trimmer: physical voltage/ current limit

*: During power on, the current can go up to 6 A for milliseconds

• A trip time is set to let the inrush current pass
• Or, actively changing current limit shortly after the power on can be set
• Cable gauge selected to handle up to 9 A

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EASY3000 crate

100 A Fuse on 48 V power input

A3009B

12 ch floating

1.5 ~ 8 V

max 9 A or

max 45 W

ALICE ITS

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2E1

RUs, PBs, and Fanout Board

Modules do not directly connect to long cables.

Exception:

-power cables from PB

-readout cables from RU

2E3

Rack 2E3 powers rack 2E1: Problem at 2E1 → 2E3 shuts down power

2E1 crates backplanes are used only for GNDs

CAEN modules

At 2E3: all CAEN

12

DIN rail connectors will be used to handle large amount of cables

→ Reduce cable weight at the connector

LV power sense will use CAT5E cable

Interlock cable (coaxial): TTL-LEMO,

Low voltage

SY5527 mainframe

(control & RB)

A3009

A3009B

EASY3000

A3486 Bulk Power

~500W/EASY3000

Short cables from A3009B (16 AWG): VW-1

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Long cables from 2E3 (16 or 12 AWG): CMR or CL2P

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Sense cables (CAT5E): VW-1

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DIN rail (10~24 AWG, 28 A, 600 V): 94V-0

DIN rail

All CAEN modules are non-NRTL. Will have them inspected by a lab EEI when arrive at BNL.

Long cables for reverse bias (RB): CMR

RB sense cables (CAT5E): VW-1

Bulk Power (48Vdc, ~500W) (10 AWG): VW-1

Bulk Power sense: VW-1

Service to Bulk Power (48 Vdc): 12 AWG: VW-1

Service to EASY3000 crate: 12 AWG: VW-1

Power

Sense

Interlock

At 2E1 (Example from ALICE ITS)

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Patch panel is used to reduce the weight at the connection at the modules & easier cabling between 2E3 & 2E1.

Cables from PB & RU to the detectors go directly without patch panel.

Need to enable PB for daisy-chaining by putting resistor

PB

RUs

Sense

Power IN

RB

Fibers

SAMTEC

Power OUT

These cables are not MVTX will use. Shown for description only.

Our cable specification can be found at: [4]https://docs.google.com/spreadsheets/d/1lBSwMTf62VBQ3n_o2NKDXxLzVPyyf5eS3rzE1_oteCo/edit?usp=sharing

At 2E1

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• 1 PU + 1 RU : 1 stave (1 PB = 2 PU )
• Bundled cables (4 wires) are distributed to the PB and RU at the patch panel.
• Voltage sensing at the patch panel.
• RB are distributed at the Fanout Board (FB) in the subrack with its voltage sensing.
• RB are distributed from the FB to PBs via daisy-chaining.

FB : Fanout Board

Distributes RB to the PBs in the subrack.

CAN-Bus to RU.

Inf. GND

→ Cables at the patch panels to modules (both at 2E1 & 2E3)

• LV to RU: 16 AWG single conductor (~ 18 A max)
• VW-1
• LV to PB: 16 AWG single conductor (~ 18 A max)
• VW-1
• RB: 20 AWG single conductor (~ 10 A max)
• VW-1
• Sense: 26 AWG CAT5E (~ 2 A max)
• VW-1
• In case of short: CAEN shut off power in unit of millisecond

Long cables screwed at the screw terminal

At 2E1

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FB : Fanout Board

Mainly distributes RB to the PBs in the subrack

To Staves

• Power to two staves from one PB (~14 m)
• Breakout board (94V-0) to staves
• Fischer company designed
• Digital 16 AWG (X2) 1.8 V X 1 A: VW-1
• Analog 22 AWG (X2) 1.8 V X 0.1A: VW-1
• Bias 24 AWG (X1) -3 V X 1 mA: VW-1
• Inf. GND 24 AWG (X1): VW-1
• PT100 24 AWG (X1): VW-1

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• Data and control between stave and RU (~14 m)
• SAMTEC Twinax EdgeRate

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1.32 m

12 m

11 m

Power & readout cables

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Data and control between stave and RU

• SAMTEC Twinax EdgeRate

12 m

Non-NRTL

Power to two staves from one PB

• Breakout board to staves: 94V-0
• Digital 16 AWG (X2) 1.8 V X 1 A: VW-1
• Analog 22 AWG (X2) 1.8 V X 0.1A: VW-1
• Bias 24 AWG (X1) -3 V X 1 mA: VW-1
• Inf. GND 24 AWG (X1): VW-1
• PT100 24 AWG (X1): VW-1

Breakout board (PCB): 94V-0

Fischer Connector

(stainless steel or brass).

PEEK: 94V-0

email discussion: [10]https://drive.google.com/file/d/1Zt-NrsKALlKYb5QtC-fK6XLh9ANbVKOi/view?usp=sharing

Power cable (inside the TPC)

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MVTX Power Connectors

More information --- [11]https://www.phenix.bnl.gov/WWW/publish/mxliu/sPHENIX/Staves/Stave-power-cables/

Non-NRTL

Non-NRTL

Power to two staves from one PB

• PCBs: 94V-0
• Digital 16 AWG (X2) 1.8 V X 1 A: VW-1
• Analog 22 AWG (X2) 1.8 V X 0.1A: VW-1
• Bias 24 AWG (X1) -3 V X 1 mA: VW-1
• Inf. GND 24 AWG (X1): VW-1
• PT100 24 AWG (X1): VW-1

PCBs: 94V-0

Fischer Connector

(stainless steel or brass).

PEEK & PBT: 94V-0

Data and control between stave and RU*

• SAMTEC Twinax EdgeRate

1.32 m

*Signal cable is 30 cm longer (PP3 to PP1 where power cable goes PP3 to PP2)

List of connectors

From 2E3 to 2E1 (for PB & RU)

• Power: Molex with crimp contact 94V-0

Ring tongue terminal (Multicomp Pro) ZMVV

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• RB: Molex with crimp contact 94V-0

DSUB connector (Amphenol ICC) 94V-0

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• Sense: RJ45 (Molex) 94V-0

TE connectivity with crimp contact 94V-0

DSUB connector (Metal hood) ECBT2

terminals Non-NRTL

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In 2E3 (for CAEN)

• Power & service: APP PP75 & PP45 with crimp contact 94V-0

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• Sense: TE connectivity with crimp contact 94V-0

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• Service power: 4 mm banana connector (48 Vdc service [2 A fused]) Non-NRTL

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Cables have UL ratings

Except the power cables shown in the previous two slides

More information at:

• [3]https://docs.google.com/presentation/d/1a-ujNMfXiKW3dAr9v_zFhHZrBSRbYB-kZNK8O92azwA/edit?usp=sharing
• [4]https://docs.google.com/spreadsheets/d/1lBSwMTf62VBQ3n_o2NKDXxLzVPyyf5eS3rzE1_oteCo/edit?usp=sharing

Power calculation

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voltage drop calculator: https://www.rapidtables.com/calc/wire/voltage-drop-calculator.html

Grounding scheme

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Based on ALICE/ITS power and grounding paths - L. Greiner

Regulators

DC-DC

“VME” type crates, 2E1

Power Supply

Power Return

Instrumentation GND

Infrastructure GND

A3009

modules

A3009

modules

Magnet support

(Main GND)

• The ground path is a standard “star” topology.
• The cold plate and space frame support (carbon material) structure infrastructure grounds are combined at the crate level and carried individually to the main grounding point.
• The RU and PB instrumentation grounds are combined at the crate level and carried individually to the primary instrumentation grounding point (Inner HCAL or Support ring).
• The CAEN crate chassis infrastructure grounds are carried per rack to the main grounding point.
• The “VME type crate chassis infrastructure grounds are carried per rack to the main grounding point.
• The CAEN A3009B modules provide individually isolated voltage channels.
• PB and RU will be GND connected via backplane

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PB

RU

Regulators

Backplane/FanoutBoard

CAEN modules GND

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• INF GND will be provided in crate level.
• Each EASY3000 crate contains 4 A3009B LV power supplies.
• Other modules: Bulk power supply & Mainframe also provide INF GND.

PB & RU GND

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• 27 inch crate / rack at 2E1
• 31 VME slots
• Backplane (VME J1) supplies instrumentation GND for PB, RU, & Fanout Board (next page)
• No power at backplane, only GNDs
• Backplane supplies infrastructure GND via PB (from/to stave carbon fiber structure)

← Breakout Board of the PB

Possible voltage exposure: 1.8 V X 1 A

Consider conformal coating

Backplane VME J1 pin assignment. Only used for GND →

Inf. GND shared between two backplanes of the crate

Stave GND

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• Each carbon composite and aluminum pieces are glued together using PU-1000 conductive glue
• Copper wire is glued (conductive) to the stave carbon fiber structure.
• Copper wire taped (kapton) on the stave & attached to the cable to the PB

Stave GND

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~ 80 cm long

• MVTX detector frame INF GND information: [7]https://drive.google.com/file/d/1UI9tHGuuyObrBi8UakomcdxHF3r-_GmY/view?usp=sharing

Fanout Board

Main purpose: distributes Reverse Supply Voltage, GND, and CAN-Bus.

CAN-Bus: comes from the counting house. It interfaces to the slow controls in the RU.

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Instr. GND

Inf. GND

RB IN sense

RB OUT 1

RB OUT 2

RB OUT 3

CAN-Bus IN

CAN-Bus OUT 1

CAN-Bus OUT 2

RB IN

All custom boards are FR4

Safety system

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Safety requirements: [12]https://docs.google.com/document/d/1KMz8V25055OjJRDhqXZHrsppUulV6mGPZYM765eXIBY/edit?usp=sharing

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safety flowcharts: [8]https://docs.google.com/presentation/d/1wIxI_JdaZ-722CcVdQ9fJHtw7MgYn_YJ/edit?usp=sharing&ouid=115313506692148889725&rtpof=true&sd=true

• Safety system for stave & power to stave
• temperature, water pressure, cooling per stave
• PLC based intelligence system.
• BNL infrastructure safety interlock
• smoke, water leak per Rack level

Safety system example

An example from the flow chart: [8]https://docs.google.com/presentation/d/1wIxI_JdaZ-722CcVdQ9fJHtw7MgYn_YJ/edit?usp=sharing&ouid=115313506692148889725&rtpof=true&sd=true

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Safety system example

An example from the flow chart: [8]https://docs.google.com/presentation/d/1wIxI_JdaZ-722CcVdQ9fJHtw7MgYn_YJ/edit?usp=sharing&ouid=115313506692148889725&rtpof=true&sd=true

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Stave Cooling System

Connected to PLC

• Flow transducer (Digital I/O)
• Pressure transducer (analogue I/O)
• Temperature sensor (analogue I/O)

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picture with higher quality: [13]https://drive.google.com/file/d/1oLH5b2HjO5Br8qE2XPSTyS6kyuB9PjQ7/view?usp=sharing

Stave Cooling

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• Each stave FPC cooling
• water pressure < 1 atm
• Water will not leak to the outside

Water cooling hoses

PP1

PP2

PP3

Electronics Cooling System

Connected to PLC

• Flow transducer (Digital I/O)
• Pressure transducer (analogue I/O)
• Temperature sensor (analogue I/O)

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picture with higher quality: [14]https://drive.google.com/file/d/1YfWWN24NepLSJas6xdVoF2u_Fgmaxe8h/view?usp=sharing

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• Each RU and PB cooling
• water pressure < 1 atm
• Water will not leak to the outside

Backside of the rack 2E1.

Each RU, PB has cooling plates

References

1. 48 Vdc bulk power supply power input (208Vac 3-phase) specification

https://drive.google.com/file/d/16Rj95IU4c__ech1yJB2aT5o_jVOlaPLg/view?usp=sharing

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• MVTX power system scheme drawing with cable information

https://docs.google.com/drawings/d/1_jeF-l10jnqIwcAkbsub0Q9S3dJP-C4aZ1vbrgAuEIc/edit?usp=sharing

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• MVTX power system cables and connector pictures and some pieces of information (pptx format)

https://docs.google.com/presentation/d/1a-ujNMfXiKW3dAr9v_zFhHZrBSRbYB-kZNK8O92azwA/edit?usp=sharing

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• MVTX power system cables info (spreadsheet format)

https://docs.google.com/spreadsheets/d/1lBSwMTf62VBQ3n_o2NKDXxLzVPyyf5eS3rzE1_oteCo/edit?usp=sharing

• Non-NRTL CAEN system manuals

https://drive.google.com/drive/folders/1c30wGXaAdvo8N90Atr6rs-mKn3xqTsKe?usp=sharing

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• MVTX cooling system
1. https://docs.google.com/document/d/1sGXjI7-JWnSVJLXJAE7nzSKvy31i-NvTcDXqpdRdnAU/edit?usp=sharing
2. https://drive.google.com/file/d/1VpJ3V8Knr9K6v6vjR09os1o3bJNme3Ou/view?usp=sharing

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• MVTX detector frame INF GND information: https://drive.google.com/file/d/1UI9tHGuuyObrBi8UakomcdxHF3r-_GmY/view?usp=sharing

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• safety flowcharts: https://docs.google.com/presentation/d/1wIxI_JdaZ-722CcVdQ9fJHtw7MgYn_YJ/edit?usp=sharing&ouid=115313506692148889725&rtpof=true&sd=true

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• Ampacity reference: https://www.powerstream.com/Wire_Size.htm

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References

10. SAMTEC data cable AHJ approval email: https://drive.google.com/file/d/1Zt-NrsKALlKYb5QtC-fK6XLh9ANbVKOi/view?usp=sharing

11. MVTX detector power cable connectors:https://www.phenix.bnl.gov/WWW/publish/mxliu/sPHENIX/Staves/Stave-power-cables/

12. Safety system requirements: https://docs.google.com/document/d/1KMz8V25055OjJRDhqXZHrsppUulV6mGPZYM765eXIBY/edit?usp=sharing

13. Stave cooling system schematic: https://drive.google.com/file/d/1oLH5b2HjO5Br8qE2XPSTyS6kyuB9PjQ7/view?usp=sharing

14. Electronics cooling system schematic: https://drive.google.com/file/d/1YfWWN24NepLSJas6xdVoF2u_Fgmaxe8h/view?usp=sharing

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Back Up

Power consumption budget

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Things to modify

• BOM: need to put detector power cable
• Prepare data sheet of commercial modules (CAEN): non-NRTL!
• Detector power cable: fire-rating can be an issue. Backup slides: data sheet of each wire UL rating
• Emphasize everything is properly fused
• What it actually looks like when the system is assembled?
• There will be walk through when assembled at BNL

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• Prepare enough data sheets and appendix. Fire rating.
• ASK Cooling system slides to MIT

38

Clean & simplify the slides & focus on the concerns.

Use p.9 in various slides to remind people.

39

PP3

PP2

PP1

MVTX Readout, Power Overview

40

9 sensors

FPC

Stave

Cold plate

high speed data & control

1.8 V, 1 A (dig) & 0.1 A (ana), GND, -3 V, 0.01 A bias

Readout Unit

Power Unit

I2C

Power Unit (PU) requires power: 3.3 V, 1.5 A

Readout Unit (RU) requires power: 7 V, 1.9 A

Reverse Bias (RB) input to Power Board (PB): - 5 V, 0.1 A

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→ All the power to the PB and RU are supplied by CAEN modules at 2E3.

Interaction Region

Rack 2E1

Two Power Units constitute one Power Board.

48 staves = 48 Power Units & 48 Readout Units

= 24 Power Board & 48 Readout Units

MVTX Readout, Power Overview

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Readout Unit

PTC fuse: 10 A

Power Unit

PTC fuse: 1.1 A (RB)

10 A (PU)

Power Unit (PU) requires power: 3.3 V, 1.5 A

Readout Unit (RU) requires power: 7 V, 1.9 A

Reverse Bias (RB) input to Power Board (PB): - 5 V, 0.1 A

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→ All the power to the PB and RU are supplied by CAEN modules at 2E3.

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Rack 2E1

3.3 V, 1.5 A*

7 V, 1.9 A

Rack 2E3: CAEN + fans

A3009B

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12 ch floating

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1.5 ~ 8 V

max 9 A or

max 45 W

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A3486

2 ch

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208Vac-48Vdc converter.

max input 5kW (3 X 25 A ext. fuse required)

(5 X 4mm2 cable: 33 A @ 440 V rated)

(2 A Fuse for service)

max output 4kW (one ch)

max output 2kW (two ch) : 10 AWG used

SY5527

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Mainframe: houses A1676A & A2518

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110Vac input

max input 20 A (Fuse)

Max output 550 W

A2518: RB to PB

8 floating ch. 3~8 V. max 10 A. or max 50 W.

A1676A: controls A3009B/EASY3000 & A3486

CAEN: Programmable voltage & current limit

A3009B: trimmer to set hardware threshold

trimmer: physical voltage/ current limit

Housed in EASY3000 crate

100 A Fuse on 48 V power input

*: During power on, the current can go up to 6 A for milliseconds

• A trip time is set to let the inrush current pass
• Or, actively changing current limit shortly after the power on can be set
• Cable gauge selected to handle up to 9 A

Too much color/information scattered around!

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2E1. 27’’-wide, 40U

2E3. 19’’, 40U

Patch Panel. 2U

27’’ VME 6U

6 X PB + 12 X RU

= 12 X (PU + RU)

12 X (5 + 12) W

Cable harness. 2U

Detail of this picture: [2]https://docs.google.com/drawings/d/1_jeF-l10jnqIwcAkbsub0Q9S3dJP-C4aZ1vbrgAuEIc/edit?usp=sharing

208 Vac 3-phase (~1.3kW) 110 Vac (~800W)

Fan. 1U. 120 W

Fan. 1U. 120 W

Fan. 1U. 120 W

Main frame. 4U Service: 200+180W

Bulk Power. 4U. Service: 100W

EASY3000 crate 6U:

4 X LV Power

Service: 4 X 20W

Patch Panel. 2U

• DC 1.8 V power (~ 1.1 A) & -3 V bias (~mA) to detectors.
• Supplies per channel (48 ch/stave)

• High-speed “firefly” signal cables
• Supplies per channel (48 ch/stave)

Patch Panel. 2U

27’’ VME 6U

6 X PB + 12 X RU

= 12 X (PU + RU)

12 X (5 + 12) W

Cable harness. 2U

Patch Panel. 2U

27’’ VME 6U

6 X PB + 12 X RU

= 12 X (PU + RU)

12 X (5 + 12) W

Cable harness. 2U

Water cooling for each module

is used in 2E1

Patch Panel. 2U

27’’ VME 6U

6 X PB + 12 X RU

= 12 X (PU + RU)

12 X (5 + 12) W

Cable harness. 2U

Fan. 1U. 120 W

EASY3000 crate

4 X LV Power. 6U

Service: 4 X 20W

Patch Panel. 2U

2E3. 19’’-wide, 40U

Fan. 1U. 120 W

EASY3000 crate 6U:

4 X LV Power

Service: 4 X 20W

Patch Panel. 2U

Fan. 1U. 120 W

Patch Panel. 2U

PLC remote I/Os

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• MVTX detector frame infrastructure GND studied by Walter Sondheim.

• MVTX detector frame INF GND information: https://drive.google.com/file/d/1UI9tHGuuyObrBi8UakomcdxHF3r-_GmY/view?usp=sharing

MVTX Cooling System and Interlock

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• Stave cooling
• Electronics cooling

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• Monitoring:
• Temperatures of stave and electronics
• Flow rate and pressure differential

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45

2E1. 27’’-wide, 40U

2E3. 19’’, 40U

Patch Panel. 2U

27’’ VME 6U

6 X PB + 12 X RU

= 12 X (PU + RU)

12 X (5 + 12) W

Cable harness. 2U

Detail of this picture: [2] https://docs.google.com/drawings/d/1_jeF-l10jnqIwcAkbsub0Q9S3dJP-C4aZ1vbrgAuEIc/edit?usp=sharing

208 Vac 3-phase (~1.3kW) 110 Vac 1-phase (~800W)

Fan. 1U. 120 W

Fan. 1U. 120 W

Fan. 1U. 120 W

Main frame. 4U Service: 200+180W

Bulk Power. 4U. Service: 100W

EASY3000 crate 6U:

4 X LV Power

Service: 4 X 20W

Patch Panel. 2U

• Modules in mainframe control Bulk Power and Low Voltage (LV) Power and supplies Reverse Bias (RB).
• Bulk Power (2 ch) supplies 48Vdc & 1.3 kW to LV Power Supplies.
• LV Power supplies DC power to the Power Board (PB) and Readout Units (RU) in 2E1.

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→ All the powers are supplied at 2E3 and distributed to 2E1.

• DC 1.8 V power (~ 1.1 A) & -3 V bias (~mA) to detectors.
• Supplies per channel (48 ch/stave)

• High-speed “firefly” signal cables
• Supplies per channel (48 ch/stave)

Patch Panel. 2U

27’’ VME 6U

6 X PB + 12 X RU

= 12 X (PU + RU)

12 X (5 + 12) W

Cable harness. 2U

Patch Panel. 2U

27’’ VME 6U

6 X PB + 12 X RU

= 12 X (PU + RU)

12 X (5 + 12) W

Cable harness. 2U

Water cooling for each module

is used in 2E1

Patch Panel. 2U

27’’ VME 6U

6 X PB + 12 X RU

= 12 X (PU + RU)

12 X (5 + 12) W

Cable harness. 2U

Fan. 1U. 120 W

EASY3000 crate

4 X LV Power. 6U

Service: 4 X 20W

Patch Panel. 2U

2E3. 19’’-wide, 40U

Fan. 1U. 120 W

EASY3000 crate 6U:

4 X LV Power

Service: 4 X 20W

Patch Panel. 2U

Fan. 1U. 120 W

Patch Panel. 2U

At 2E3

• All modules in 2E3 are CAEN modules, except external fans
• A1676A in mainframe controls all the other CAEN modules.
• A2518 in mainframe supplies RB to 2E1

​

• Bulk Power supply (A3486) supplies power to the LV power supplies. 2 ch are used each with 48 Vdc, 500 W
• each ch goes to EASY3000

​

​

46

Bulk Power supply

48 Vdc, 500 W X 2 ch

Mainframe.

A1676A controls CAEN. A2518 supplies RB

RB: -5 V & sense

→ Cables:

​

• RB to PB (2E1): 4 X 16 AWG multi-conductor.
• 4 wires in bundle: 1 FB/Crate → 4 cables
• -5 V X 0.1 A CMR
• RB sense: 26 AWG CAT5E LAN cable. < 2 A AWM 21215 VW-1
• Bulk Power: 10 AWG single-conductor. ~ 10 A MTW OR TW 600V OR AWM 1015/1230 VW-1
• Bulk sense: 26 AWG CAT5E LAN cable. < 2 A AWM 21215 VW-1
• Service to Bulk Power supply from Mainframe (A1676A): 12 AWG single-conductor. 48 Vdc, 100 W

MTW OR TW 600V OR AWM 1015/1230 VW-1

AC power

Patch panel

At 2E3

• LV Power Supplies (PS) (A3009B) are housed in EASY3000 crate. 4 LV per crate
• LV PS has 12 ch (48 staves → 48 ch for PU & 48 ch for RU → 96 ch → 8 LV PS needed → 2 EASY3000 crates)
• Each LV channel provides 3.3 V X 1.5 A for PU and 7 V X 1.9 V for RU.

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A3009B

Fan

48 Vdc 500 W Bulk Power with sense

→ Cables (5~10 m):

• LV to PB (2E1): 4 X 12 AWG multi-conductor (9.6 A max)
• 4 wires in bundle: 2 PU = 1 PB → 24 cables
• 3.3 V X 1.5 A CL2P
• LV to RU (2E1): 4 X 16 AWG multi-conductor (5 A max)
• 4 wires in bundle: 1 RU → 48 cables
• 7 V X 1.9 A CMR
• LV sense: 26 AWG CAT5E LAN cable. (~ 2 A max)
• 8 wires in bundle AWM 21215 VW-1: 96 ch → 12 cables

​

​

• Service to EASY3000 from Bulk Power:

12 AWG single-conductor. 48 V, 20 W MTW OR TW 600V OR AWM 1015/1230

VW-1

​

Powers are distributed from the patch panel in 2E3 to the patch panel in 2E1.

All cables from CAEN modules to PB and RU go through patch panels in each rack.

→ To reduce the direct tension at the connection in the modules due to the weight of the cables (5~10 m)

A3009B

A3009B

A3009B

EASY3000

At 2E1

48

• 1 PU + 1 RU : 1 stave (1 PB = 2 PU )
• Bundled cables (4 wires) are distributed to the PB and RU at the patch panel.
• Voltage sensing at the patch panel.
• RB are distributed at the Fanout Board (FB) in the subrack with its voltage sensing.
• RB are distributed from the FB to PBs via daisy-chaining.

FB : Fanout Board

Distributes RB to the PBs in the subrack.

CAN-Bus to RU.

Inf. GND

→ Cables at the patch panels to modules (both at 2E1 & 2E3)

• LV to RU: 16 AWG single conductor (~ 18 A max)
• VW-1
• LV to PB: 16 AWG single conductor (~ 18 A max)
• VW-1
• RB: 20 AWG single conductor (~ 10 A max)
• VW-1
• Sense: 26 AWG CAT5E (~ 2 A max)
• VW-1
• In case of short: CAEN shut off power in unit of millisecond

Fanout Board

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Instr. GND

Inf. GND

RB IN sense

RB IN

RB OUT 1

RB OUT 2

RB OUT 3

CAN-Bus IN

CAN-Bus OUT 1

CAN-Bus OUT 2

At 2E1

50

FB : Fanout Board

Mainly distributes RB to the PBs in the subrack

To Staves

• Power to two staves from one PB
• Breakout board to staves
• Fischer company designed
• Digital 16 AWG. 1.8 V X 1 A
• Analog 22 AWG. 1.8 V X 0.1 A
• Bias 24 AWG. -3 V X 1 mA
• Inf. GND 24 AWG.
• PT100 24 AWG.

​

• Data and control between stave and RU
• SAMTEC Twinax EdgeRate

​

​

​

1.32 m

12 m

11 m

At 2E1 (Power Distribution Patch Panel)

51

Voltage Sense RJ45 port

Long cables screw terminal

Short cables connectors

List of connectors

From 2E3 to 2E1 (for PB & RU)

• Power: Molex with crimp contact ECBT2

Ring tongue terminal (Multicomp Pro) ZMVV

​

• RB: Molex with crimp contact ECBT2

DSUB connector (Amphenol ICC) ECBT2

​

• Sense: RJ45 (Molex) DUXR8

TE connectivity with crimp contact UL 94V-0 (not listed)

DSUB connector (Molex) ECBT2

​

In 2E3 (for CAEN)

• Power & service: APP PP75 & PP45 with crimp contact UL 94V-0

​

• Sense: TE connectivity with crimp contact UL 94V-0 (not listed)

​

• Service power: 4 mm banana connector (48 Vdc service [2 A fused]) Non-NRTL

52

Cables have UL ratings

Except the power cables shown in the previous two slides

53

“negative” pressure water cooling

54

CAEN supply electrical safety

55

This is the only unit that sees the AC mains.

​

A different 48V DC supply that is compliant to US/BNL electrical safety standards can be used.

​

Other CAEN crates are all CE certified, running off of the 48V DC power.

Power system

56

Test system at LBNL

Power board

PB & RU in rack

Power supplies

Taken from ALICE ITS

57

Grounding scheme

58

CAEN modules GND

59

• INF GND will be provided in crate level.
• Each EASY3000 crate contains 4 A3009B LV power supplies.
• Other modules: Bulk power supply & Mainframe also provide INF GND.

2 mm & 20 AWG banana connector

https://www.newark.com/radiall/r921330/connector-2mm-plug-black/dp/10R0723?st=r921

Non-NRTL

Please, leave your comments!

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