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Cabling, Interlocks, Racks

Cabling, Interlocks, Racks. Some remarks. Introduction. Re-iterate and update a few remarks from last workshop on interlocks and cabling Stefano will cover some rack related issues. Interlocks. This addresses only the hardwired interlocks

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Cabling, Interlocks, Racks

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  1. Cabling, Interlocks, Racks Some remarks

  2. Introduction • Re-iterate and update a few remarks from last workshop on interlocks and cabling • Stefano will cover some rack related issues ALICE DCS Workshop

  3. Interlocks • This addresses only the hardwired interlocks • We received no more additional input from the detectors since last workshop • We discussed with the principal sources of hardwired interlock signals:cooling and gas systems ALICE DCS Workshop

  4. Interlocks [cooling] • Any serious malfunctioning that would justify an interlock will affect the whole plant • Therefore the TS/CV group has foreseen only a single interlock signal per cooling plant (=per detector) • Only SDD (as far as known to us) had foreseen to receive more interlocks • TS/CV was not aware of this • We will need to see what are their exact requirements ALICE DCS Workshop

  5. Interlocks [gas] • The gas system will provide a single hardwired signal per gas system (=per detector) • This signal will be a copy of a software status indicating if the gas system is working nominally • There will be no delays in the signal • Gas quality in the detector will only start to deteriorate after some time ALICE DCS Workshop

  6. Interlocks • If this does not suit you… • …It’s too late ! • … come with justification to re-discuss with TS/CV or Gas • Remaining issues: • Distribution of the signal to the equipment (mainly power supplies) • Implementation of delays (especially for gas) • Did any of you already worked on these issues? • Other (non gas or cooling) interlocks • E.g. PMD “detector position” interlock ALICE DCS Workshop

  7. Cabling issues • Several issues related to cabling were presented in the last workshop • These concern control, interlock and network cables • In most cases the responsibility is as follows: • We define the cables and connectors • You define where they go (the ‘nodes’, in the cable database) ALICE DCS Workshop

  8. Cabling issues[control cabling: ELMB CANbus] • Carries bus and power • For ALL detectors power is provided centrally • All cabling starts from CR3 • Both power (rack Z08) and bus (racks Z01-Z06) • Up to the first ELMB a ‘big’ cable is used • To limit voltage drop • A ‘patch box’ is under development • A ‘standard’ ELMB to ELMB cable is under definition SCEM: 04.21.60.491.2 prototype exists defined SCEM: 04.21.60.430.5 ALICE DCS Workshop 13 June 2005

  9. Cabling issues[control cabling: ELMB CANbus] Central powersupplies [in CR3] • Do not use flat cables when not strictly needed • Sensor – ELMB cabling is up to you • But we can help • Related point:Signal adapters are (will be) centrally available • Communicate us your needs! Rack mounted PCs With Kvaser CAN card [in CR3] CANbus Power Defined/delivered by central DCS team (paid by detectors) CANbus & Power [in same cable] patchbox Guidelines by central DCS team Need to be ordered ELMBs [on detector?] to Sensors ALICE DCS Workshop 13 June 2005

  10. Cabling issues • With the rack layout becoming clearer, other cables can be defined: • CAEN bus from branch controller to easy crates • ‘normal’ CAN bus (Iseg HV, crate control Wiener VME) • Network (to Wiener LV, CAEN SY, Switches etc.) • Communicate any change in rack layout to Jean-Pierre Vanuxem and/or us • These files are our source of information! ALICE DCS Workshop

  11. Summary • One interlock per detector for cooling and gas • Discuss with SDD • Look at distribution of interlock signal • Cabling more and more defined • Communicate your ELMB needs • Keep your rack layout up to date ALICE DCS Workshop

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