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Nano PLC Replacement Programme

This proposal outlines the current situation and requirements for replacing the obsolete Nano PLCs in various locations. It also introduces a new, simpler solution for controlling power sources. The proposal includes a timeline for implementation and is based on the EDMS 1505921 presentation.

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Nano PLC Replacement Programme

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  1. Nano PLC Replacement programme • Contents: • Current situation • Requirements definition • Current DSS solutions (Atlas/CMS) • Outline Proposal • Timescale for implementation • Presentation based on EDMS 1505921 • “AU Chain Distribution Boxes” Nano PLC Replacement

  2. Current situation – Locations: • 7 No. in East Hall – EBC26*EH(EP-T7), EBC27*EH(EP-T8), EBC28*EH(EP-T10), EBC29*EH(EP-T11 Cloud), EBC30*EH(EP-T9), EBC31*EH(EP-T7), EBC35*EH(EP-T9). • 2 No. in West Hall – EXC8*WH, EXC21*WH • 3 No. in AD Hall – EXC11*49(ASACUSA), EXC15*49(ATRAP), EXC18*49 • 3 No. in EHN1 – EXC404/HN1, EXC414/HN1(HNA903), EXC418/HN1(HNA903) Nano PLC Replacement

  3. 1. Current situation – Functions: AUL chain activation, Temperature alarm (2 thresholds), Fire detection interlock, Gas Detection interlock, Loss of power (220V), External AUL input, External Gas input, External AUL secondary input, External Gas secondary input, Power trip, Air conditioning loss of power. Nano PLC Replacement

  4. 1. Current situation – Motivations for change: Schneider NANO PLC completely obsolete. EL control of CV equipment. EL control of GS/ASE equipment (fire/gas). Use of PLC requires pro-active management. Current system overly complex. Time for a new, simpler, solution… Nano PLC Replacement

  5. 2. Requirements definition From IS5: AUL Purpose: AUL - specific features: cut off power sources situated inside or serving a geographically circumscribed position or installation. Areas to be equipped: AULs must be installed in restricted premises or areas that are clearly demarcated such as workshops, laboratories, barracks and similar areas and/or other types of plants with risks greater than those of ordinary domestic appliances or office equipment. Nano PLC Replacement

  6. 2. Requirements definition From IS5: All AUL actuators at a given point, or those of an AUG in a building or hall must have the same effect. Nano PLC Replacement

  7. 2. Requirements definition • Major event 2012 – ALPHA experiment power cut due to Nano. • Additional user requirements, defined by EN/MEF with HSE, GS/ASE, EN/EL and EN-DSO for Secondary Beam Areas (SBA’s): • Covers each system, AUL, AUG, ODH, Gas, Fire and Temperature. • Ability to cut electrical power to a defined zone or zones upon the activation of either a manual switch or automatic interlock with another system, notably ATEX gas detection. • Maximum granularity and flexibility for the selection of zones in which emergency electrical power cuts may be affected. • A highly reliable system, fail safe and suitable for life safety applications. Nano PLC Replacement

  8. 2. Requirements definition • EN/EL requirements: • Compatibility with new philosophy using contactors as a replacement for MN coils to reduce the call out requirements for the EN/EL piquet service. • A cost effective system which can be maintained without major intervention, replacement or upgrade for a significant period of at least 25 years. • Enhanced indication of the location of AUL chain trip events (manual or interlock) to facilitate interventions. Nano PLC Replacement

  9. 2. Requirements definition • Summary: • A simple, reliable and modular system. • Suitable for various topologies of experiments and physics barracks. • External input from Gas Detection only. • Indication of activation for faster Piquet intervention. • Can be reset by deliberate user action. Nano PLC Replacement

  10. 3. Current DSS solutions (Atlas/CMS) Electrical monitoring (SCADA) Experimental Monitoring DCS Status “Twido” Box Circuit breakers Rack End user rack Electrical power supply Off • Experimental control of circuit breaker state • “AUE” for rack • Local feedback from rack (fans/temperature) • Control signals from experiment (on/off) from either: • DSS • DCS • Both, in some cases On/Off Experimental Control (DSS/DCS) Nano PLC Replacement

  11. 3. Current DSS solutions (Atlas/CMS) Electrical monitoring (SCADA) Experimental Monitoring DCS Status COMPLEXITY “Twido” Box Circuit breakers Rack End user rack Electrical power supply Off • Experimental control of circuit breaker state • “AUE” for rack • Local feedback from rack (fans/temperature) • Control signals from experiment (on/off) from either: • DSS • DCS • Both, in some cases On/Off Experimental Control (DSS/DCS) Nano PLC Replacement

  12. 4. Outline ProposalModular ABS boxesPrinted Circuit Board logic & integrated relays (as AUG)2 Inputs, 2 outputsStatus indicator (Healthy or Trip)Reset button (for user reset)One box per barracksOne box per experimental zoneDaisy-chain boxes for combined zonesAction on MN coil or contactor in switchboard G.Girardot / LHC Pt3 et Pt7

  13. 4. Outline Proposal AUL Output to EXD, EBD or Canalis tap-off AUL Chain (Barrack or Experiment) AUL Buttons AUL Trip indicator LED/LAMP AUL Circuit Chain (Next box or interlock) AUL Circuit Chain (Next box or interlock) Reserve Reset G.Girardot / LHC Pt3 et Pt7

  14. 4. Outline Proposal Simple configuration G.Girardot / LHC Pt3 et Pt7

  15. 4. Outline Proposal Inclusion of Gas Detection G.Girardot / LHC Pt3 et Pt7

  16. 4. Outline Proposal Combination of 2 experimental areas G.Girardot / LHC Pt3 et Pt7

  17. 4. Outline Proposal Combination of 2 experimental areas from independent sources G.Girardot / LHC Pt3 et Pt7

  18. 4. Outline Proposal Control of two independent areas supplied from the same switchboard G.Girardot / LHC Pt3 et Pt7

  19. 4. Outline proposal AUL distribution box concept: EXD/Canalis Tap Off + MN AULx1 48V EXD/Canalis Tap Off + MN AULx2 AUL button action illuminates indicator in local box only to facilitate location of the incident. Input for Experiment/Explosive Gas/Etc. interlock acting on output circuit

  20. 4. Outline proposal

  21. 4. Outline proposal Compatible with current infrastructure: Input: 48V DC, low current consumption (15VA inrush, <1W consumption in operation). Supply derived from TGBT Output: 48V DC latching signal, suitable for MN coils, or hold open contactor circuit – for future developments of distribution in SBA’s.

  22. 5. Timescale & Cost Phase 1: Design and Prototype validation, May – July 2015 Phase 2: Series Fabrication (50 units), July – September 2015 Phase 3: Installation EHN1, September – December 2015 Phase 4+: Installation in East and West areas, 2016+

  23. 5. Timescale & Cost Cost estimate for 50 No., based on PIC chain campaign: PCB Fabrication (TS-DEM) 3400 CHF Assembly (TS-DEM) 1000 CHF Components (TS-DEM) 1600 CHF Installation in boxes (C213) 3500 CHF Total 9500 CHF Suggested budget envelope 10-12k CHF, Approx. unit cost 200 CHF/box

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