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Upgrade DCS

Upgrade DCS. The High Voltage, Monitoring and Control systems of the Hadronic and Electromagnetic calorimeters are essentially slow control based, and therefore are independent on data taking and can be kept for upgrade. The components of the present CALO DCS based on SPECS bus:

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Upgrade DCS

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  1. Upgrade DCS • The High Voltage, Monitoring and Control systems of the Hadronic and Electromagnetic calorimeters are essentially slow control based, and therefore are independent on data taking and can be kept for upgrade. • The components of the present CALO DCS based on SPECS bus: • HV-LED boards; • integrator readout boards (INTEG) (readout of HCALPMT anode currents); • LEDTSB boards. • Should be changed to a GBT-based protocol. • The system of the 137Cssource motion control communicates via CANbus will be able to work as is after upgrade. • There are other types of boards, which are controlled and powered by the control boards and not communicate with DCS: • CW bases (+PMTs); • HCAL integrator frontend boards; • LED driver boards; • PIN modules.

  2. Inventory Total of 56 SPECS slave mezzanines  GBT-SCA

  3. ECS (GBT) For upgrade ECS, one can use the GBT-SCA circuit, which provides similar (and richer) functionality: • Each HV-LED, INTEG and LEDTSB board is equipped with a SPECS slave mezzanine. • The SPECS slave mezzanine provides, in particular, the following functionality: • One long distance point to point differential SPECS interface (coming from the SPECS master) • One unipolar SPECS local interface for multi-load bus applications • One local and one long distance I2C bus • One JTAG bus • One parallel bus offering 16 data bits and 8 address bits • One decoder for the channel B of the TTCrx • One DCU chip with 6 ADC channels of 12 bit resolution and 1 temperature channel It is proposed to develop a SCA mezzanine with the same form factor as the SPECS mezzanines, and make replacement on all the ECS components (HV-LED boards, integrator boards, LEDTSB) As the GBT-SCA power supply voltages (1.2V core, 2.5 V IO) are different from those of SPECS (5V, 3.3 V), the GBT-SCA mezzanine will have power regulators on board, either analog ones or DC-DC converters. Also, corresponding level adapters will be foreseen for connection of GBT-SCA to 3.3V logic.

  4. ECS (GBT) The LEDTSB boards will use the infrastructure of the FEB crates where they are installed. In particular, they can use slow control lines of the crate. For the case of standalone HV-LED and INTEG boards, we will need to foresee fanout boards based on GBTX, which ensure communication of one DCS computer to several control boards. These fanout boards will be standalone, and mounted nearby the HV-LED & INTEG boards. Necessary number of power lines should be foreseen. The number of fanout boards will be determined by e-link maximum length and maximum number of GBT-SCA which can be served by one GBTX.

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