Electrical Architecture and Interfaces

Pierre PRAT Progress Meeting @APC the 12.10.2012 Michel DUPIEUX

Grounding

Grounding Design is now stable after Johan Panh’s Remarks

Grounding principlesIn order to avoid ground loops:

Use of galvanically isolated DC/DC convertersPrimary grounds (28V Battery) shall be

connected on Mechanical ground of PWP Secondary grounds of DC/DC converters shall

be connected on a single point on Mechanical ground of sub-equipments (DP, PDM)

Mechanical grounds connected togetherDifferential links (LVDS) between HK, CCB and

PDM_Board, HVPS-1

Harness shieldingAccording to the recommendations of Johan Panh:

Primary power supplies : twisted pairs, not shielded Secondary power supplies :

LVPS-PDM <==> PDM_Board : twisted pairs, shielded, with shielding connected to mechanical ground (360°) on each sides (HF immunity)

HVPS-1 <==> HVPS-2 : twisted pairs, shielded, with shielding connected to mechanical ground on HVPS-1 side and open on load (BF immunity)

LVPS-HK, LVPS1-DP, LVPS2-DP <==> HK, CCB, CLKB, GPSR, CPU, DST: twisted pairs, not shielded (TBC: internal connection of DP)

Differential digital links: twisted pairs, shielded, with the shielding connected to mechanical ground (360°) on each side

2 2 222 2 2222

HK

1

2

BAT_RET (P)28V_BAT (P)

GND_28V (S)

GND_3.3V (S)

28V (S)

3.3V (S)

GND_M HVPS-1 would have DC/DC

converters to isolate the powers

GND_M

0-2.44V

STATUS

ON/OFF

3 DAC

6 Differential signals (LVDS) ( x2 = 18 wires)between HK and HVPS-1

4 differential transmitters

2 differential receivers

CS_DAC

CS_IO

HVPS-1

MISOMOSISCK

MOSI

MOSI

6 bidirectional signals6 status signals

I/O expanders

4 differential receivers

MISO

Interrupt

SCK

SCK

Interrupt

HVPS-1 - HVPS-2 - HK - PDM-Board Interface Synoptic : 1st flight version

D-Sub 15 F

D-Sub 15 F

D-Sub 15 M

D-Sub 15 M

6 C-W

D-Sub 9 FD-Sub 9M

BATTERY

3 C-W 6 x 14 HV lines

3 x 14 HV lines

9

9

3

3

STA

TU

S

3

ON

/OF

F

3 0

-2

.44

V

GND_M

HVPS-2CS_DAC

SCKMOSICS_OUT 6 DAC

6

D-S

UB

2

5 F

D-S

UB

2

5

M

D-Sub 9 FD-Sub 9M

24 wires

PDM_Board

Micro-D 9 F

Micro-D 9 M

4 differential receivers

4 differential transmitters

4 Differential signals (LVDS) ( x2 = 8 wires)between PDM_Board and HVPS-1

4 SWITCHCOMMANDS

4 SWITCHCOMMANDS

2 differential transmitters

HVPSArchitecture and I/F are now stable:

2 HVPS boxes in PDM box: HVPS-1:

2 CV DC/DC (28V & 3.3V) for ground isolation SPI I/F with HK, LVDS I/F with PDM-Board (switch pulses), 3 DACs (HV tuning), 3 Cockcroft-Walton Converters.

HVPS-2: 6 DACs (HV tuning), 6 Cockcroft-Walton Converters.

HK

Electrical Interfaces are clearly defined (connectors, pinout Ok)

Subd25 or 37?

Subd25 or µSubd9?

DP Block Diagram28V

DPLVPS

vSpaceWire

5V

Ethernet

vSATAData

Storage

Visible cam(adv. opt.)

SpaceWire

to PCI

vPCI

GPS

v

HK system

v5V

5V

28V

CLKs, Sync, Trig, Busy

RS232

PDMbox

vRS422

12V, 5V, 3.3V

RS 422

Fast

par

alle

llin

k

SPI

PWP

V, T

mon

. SPI

12V

CCB

CPU

IR Camera(adv. opt.)

CLKboard

SIREN system

vSpaceWire

V, A Monitor

1PPS

TLS

Ana

log

( T)

Analog( T)

RelaysboardHL-CMD CC

Data Processor block diagram

DP connectors ?

Pinout and connectors need to be checked and update very soon

CPU CCB CLKb GPSr HK LVPS1 LVPS2 LVPS3 PDLVPS PDM PWP SIREN TLSCPU - MDM

DB9MDM DB9

- DB9 +DB9

DB15 - - - - - RJ45 -

CCB MDM DB9

- MDM DB15

- DB15 - DB9 - - MDMDB51

- - -

CLKb MDM DB9

MDM DB15

- MDM DB9

DB15 - DB9 - - - - - -

GPSr - - MDM DB9

- DB15 - DB9 - - - - - -

HK DB9 + DB9

DB15 DB15 DB15 - DB15 DB15 DB15 DB15 MDM DB15

- DB9? 3 x DB9

LVPS1 DB15 - - - DB15 - - - - - DB9 - -LVPS2 - DB9 DB9 DB9 DB15 - - - - - DB9 - -LVPS3 - - - - DB15 - - - - - - - -PDLVPS - - - - DB15 - - - -PDM - MDM

DB51- - DB15 - - - DEMM9S

DB9+DB15- - - -

PWP - - - - - DB9 DB9 DB9 DB9 - - ? -SIREN RJ45 - - - DB9 - - - - - - -TLS 3 x DB9 -

LVPS-PDM

PDM Power connections

Pinout and connectors between PDM_Board and EC_Asic are checked

GND_5V_EC (S)

5V_EC (S)

EC-ASIC

3.3Vd_EC (S)

1.5V_EC (S)

GND_1.5V_EC (S)

GND_3.3Vd_EC (S)

3.3Va_EC (S)GND_3.3Va_EC (S)

FPGA

GND_MConnector

PDM-LVPS

GND_5V_PDMB (S)

5V_PDMB (S)

PDM BOARDTES 1-0511V

Regulator

1.5V

GND_M

3.3V

EC_ASIC 1

FPGA ground should be linked to the GND_M

GND_1.5V_EC should be linked to the gnd of the FPGA1V

1.8V

Connector PDM_EC_ASIC

PDM

Kapton cable

Fixation screw

MAPMT

ASIC B ASIC FASIC D

68 pins

ASIC A

68 pins

ASIC CASIC E

120 pins

A B C D E F68 pins

68 pins

68 pins

68 pins

EC_HV

Interfaces with:

CCB µSubd51 HVPS µSubd9

HK µSubd9? Subd25 on HK? POWER Subd9

PWPPWP2-OutsidePower 22W??

Which dimensions

PWP1-InsidePower 250 W ??

All connectors on a single side

PWP-outside

PWP-Inside

9 pins Sub-Dconnector

To IR-CAM

ToLVPS-DP1LVPS-DP2LVPS-PDMLVPS-HKHVPS1

Plus two additional

PWP ComponantBattery Cells, Connectors and Cables

•Cells

•Connectors

•Cables

Option I: In case of 90W power consumption it will be necessary 20 cells of Saft G62/1.2 Option II: In case of 250W power consumption it will be necessary 50 Cells of Saft G62/1.2

The Connectors we are going to use are 9 pins D-Sub connectors for all interfaces and subsystems.

The Cables we are going to use are THERMAX MIL-DTL-22759/91,92 for all interfaces and subsystems.

PWP Power Budget ??

Interface Power ConsumptionIR Camera 22W

High Voltage Power Supply 2WLVPS DP1 7.2WLVPS DP2 7.2W

Housekeeping 6WLVPS-PDM 2.4W

CPU 14.4WCCB 5W

Data Storage 18WGPS 1.2WCLK 3.6W

Additional Spare 15WHeaters TBC

Total: 111.2W+20% of security Margin = 133.4W Additional Heaters and backup = 70W(150+60)+20% of security Margin = 243.6WThis version should be discussed

250W

Interface Power Consumption

IR Camera 22WHigh Voltage Power Supply + Switches

2W

Housekeeping 6WCCB 5W

LVPS DP1 7.2WLVPS DP2 7.2WLVPS-PDM 2.4W

Additional Spare 15WTotal Power Budget:

74W+20% of Security Margin = 90W

90W

- Which congiuration for Baseline?- Which power for Pack2 for IR Camera?

PWP

Switch

- +

Battery Pack

Electrical Fuse

Thermal Fuse

External Pwr Supply

Main Power

Primary Return

Power

Splitter

2

1

3

4

D-Sub

9 Pi

n D

-Sub

Fem

ale

Where:

1) LVPS Connector/9 pins D-Sub Connector2) IR Camera Connector/ 9 pins D-Sub Connector3) Spare A / 9 pins D-Sub Connector4) Spare B/ 9 pins D-Sub Connector

Making Zoom in any D-Sub Connector

1 2 3 4 5

6 7 8 9

+28V Return

Battery Box Distributor Box

9 Pin D-Sub M

ale

Short circuit risk?

- Femeale connector on power side- PinOut of External Power- Common Ground or Ground Switching ?- Pinout Compatibility with LVPSs and HVPS1 ?- IR Camera the same way with separate Battery?- Who Provides Material and cables?

Femeale connector?

SIREN

Electrical Interfaces are clearly defined (connectors, pinout Ok)

HK

DP

232/422

CablesWho provide cables between:

HK and SIREN ? HK and DP ? PDM and DP ? DP and SIREN ? PWP_1 and LVPS (4)? PWP_1 and HVPS_1? LVPS_PDM and PDM? HK et HVPS_1? PDM_and HVPS_1? CCB and PDM_board? HK et PDM Board? IR Camera ?

ToDo Which Power budget PWP_1 ?

Clarify Power Pack interfaces.

Who provides Batteries (PowerPack 1 and Power Pack 2 ?

Clarify internal and external interfaces for DP (update Synoptic).

Define cables, providers ?

Use in general Femeale connector on Fixed on boxes exept for power side to avoid short circuit risk!!!

Documentation