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Electronics Overview for T0 Detector System at CERN

Detailed overview of the functional diagram, VME controller, power supply, and communication system for the T0 Detector at CERN. Includes information on control parameters, data transmission, and device compatibility. Learn about Serial Communication standards RS-232, RS-485, and RS-422. Discover how to re-direct serial communication for PC control. Refer to "how-to" guides for more information.

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Electronics Overview for T0 Detector System at CERN

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  1. T0 DCS status Meeting on V0 and T0 electronics 10 December 2004 CERN

  2. Power Supply functional diagram of the T0 Detector

  3. Overview of VME controller V2718+A2818: PCI - VME Bridge. VME64x compliant Optical Link 1.25 Gbit/s Daisy Chain Capability (up to 8 V2718 per A2818) PCI 32 bit / 33MHz Low Protocol Overhead Transfer rate: up to ~60 Mbyte/sec No boot required: ready at power-up! Front panel dataway display Seven programmable I/Os

  4. Overview of electronics array

  5. Main parameters of the Detector Control System for the T0 • Subsystem location Controlled parameters Number Contol • ---------------------------------------------------------------------------------------------------------------------------- • Fast electr. VME delays 24 W • Thresholds for CFD 24 W • Thresholds for T0v 2 R/W • Thresholds for multiplicity • trigger 3 R/W • ---------------------------------------------------------------------------------------------------------------------------- • T0TRM VME crate same as TOF • T0DRM VME crate same as TOF • --------------------------------------------------------------------------------------------------------------------------- • Low voltage CAEN2725 LV supply on/off 6 R/W • for Shoe Box LV settings and readings 6 R/W • safety switch 1 on/off • --------------------------------------------------------------------------------------------------------------------------- • HV voltage CAEN2725 HV supply on/off 24 R/W • HV settings and readings 24 R/W • safety switch 1 on/off • --------------------------------------------------------------------------------------------------------------------------- • Laser system switch 1 on/off • attenuator 1 R/W • --------------------------------------------------------------------------------------------------------------------------- • Generator switch 1 on/off • ---------------------------------------------------------------------------------------------------------------------------

  6. Serial Communication, simple, reliable and over long distances. Date: 14.09.2004 Serial Communication, RS-232…..and more Most successful serial data standard for PC and telecom applications is RS-232. Similarly, RS-485 and RS-422 are among the successful standards for industrial applications. The standards are not directly compatible. Examples of serial devices: The PC mouse, modems, numerous measurement equipment, (volt/ampere meters, multimeters) PC controlled industrial equipment, etc. RS-232: single-ended signals standard for serial communication with Baud rates of 100 to 115200 Baud over distances from 900 to 15 meters. Data-rate capability of about 1Mbps. RS-422: differential signals standard for transmission over greater distances. RS-485: improved version of the RS-422 standard for even longer line lengths and more nodes on a bus system. For more info: type: “how to”, RS-232, RS-422, RS-485 in Goooooogle 1

  7. Re-direction of Serial Communication Date: 14.09.2004 Controller PC or Workstation WinXP PVSS2 VHV application “talks” to PC’s local COMport and data is re-directed via ethernet and a converter to the serial device. Digi-One software for serial re-direction (See www.digi.com) EtherNet Ethernet/Serial Converters (Digi-One SP with Firmware) Serial Device 2A

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