SERIAL
likewise “DORIS”
likewise “PETRA”
“HERA”
Controlled access to restricted areas of DESY accelerators. A. Labudda
DORIS with 6 access doors.
PETRA with 11 access doors.
HERA with 14 access doors
Each door must be manageable by one member of the “Night –Shift”
The problem
The equipment
The implementation
Server PC
likewise “HERA south”
Each of the server application sends its set of status messages to console
Status
Status
Status
Status
3 - Eject card after acceptingcurrently not in use
1 - Select the videosignal to be displayed
2a - Open the key box2b - Select door and prepare it for usereverse a and b if leaving the accelerator
Status
4 - Register a person as “in access” or “leaving access” currently not in use
Server PC with 5 server applications Console PC
DORIS
PETRA
HERA
likewise “HERA east”
likewise “HERA north”
HERA westlikewise “HERA B”
likewise “HERA west right”
RS 422 from card reader to concentrator
Videoline
Phone line for accelerater
SEDAC
View of access HERA west left
Contacts to check the door
Camera to observe the door
Keys in a box to disable accelerator
Card reader Concentrator to connect several card reader to a serial line
Video multiplexer
Door module makes informationavailable for SEDAC
60 V line
“HERA west left”
Video camera
Emergency off / interlock brocken
key switches
Box controler
Access door
60 V
60 V
SEDAC
SEDAC
Door selection
Card reader
concentrator
The real button of access
Operators console
Matrix video multiplexer
RS 232 from concentrator to PC
SEDAC
LAN
Video multiplexers
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