22/03/11FV 1 NA62 DCS CAN bus lines

Short reminder General properties of CAN bus o Up to 64 nodes on one bus o Different devices need different buses (WIENER, ISEG, ELMB,?) o Transition rate depends on the length of cable (from 1 Mbit/s for 25m to 10 kbit/s for 5000m) o Characteristic impedance 120 Ohm, termination on both ends o The starting point of the CANbus cables is DCS rack(s) in the PC farm area (b.918) ISEG CAN bus o One module has two CAN-nodes, crate is one node. So one fully populated crate with 8 Modules EDS n_504 equals 17 CAN-nodes o Not more than 3 crates per cable o Peak PCAN-PCI two channel cards VF2 22/03/11

Short reminder -2 ELMB CAN bus o In addition to the CAN bus signals the cable also provide the power for the ELMBs (12V) o Thick cable (SCEM code ) will be used for long distance to minimize the voltage drop, thin cable (SCEM code ) for local distribution + junction box “a la ATLAS” (has to be investigated) o Fixed double cable “PHOENIX CONTACT” connectors o Kvaser PCIcanx 4xHS cards WIENER CAN bus o Kvaser PCIcanx 4xHS cards o TCP/IP option for the WIENER equipment control is under consideration. Price for one fan-tray unit CAN bus: 627 EURO TCP/IP: 755 or 991 EURO In total we will have about 60 crates VF3 22/03/11

Experimental Area VF4 22/03/11 PC farm area

ISEG CAN bus lines VF5 22/03/11 GT 854 (to PC farm) GT 853 (to NA48 CR) MUV, SAV LAV 12, 11, 10 LAV 9, 8, 7 LAV 6, 5, 4 LAV 3, 2, 1 CEDAR (?)

ISEG CAN bus lines VF6 22/03/11 LAV 3, 2, 1 CEDAR (?)

WIENER crate control CAN bus lines VF7 22/03/11 GT 854 (to PC farm) GT 853 (to NA48 CR) LKr All other crates in EB, LAV12, LAV11, LAV10 Straw tracker LAV 9, 8, 7, 6, 5, 4, 3, 2, 1, CHANTI, GTK (?), CEDAR

WIENER crate control CAN bus lines VF8 8/02/11 LAV 5, 4, 3, 2, 1, GTK (?), CHANTI, CEDAR

ELMB CAN bus lines VF9 8/02/11 LKr RICH, MUV, SAV STRAW 1 STRAW 2 STRAW 3 STRAW 4 CHANTI, GTK3, GTK2, GTK1, CEDAR

Other CAN bus lines o CAN bus cables for LAV thresholds (one cable per station) o Gas systems (one cable per system ?) o CEDAR NINO front-end cards control (one cable)? o RICH NINO front-end card control ? VF10 22/03/10