1. ECS for Front-End crates MARATON

2. 2 Introduction Front-End crates are powered by MARATON power supplies, located on the platform, at the back of each Front-End crate, which have to be powered on before taking data. One MARATON power supplies consists in 4 channel, all of them must be switched on/off in parallel. MARATON power supplies are accessible via INFDAI PVSS project, which allows to switch on/off all or part of the power supplies.

3. 3 Definitions RCM: Remote Control Module, the electronics board which controls remotly the MARATON power supply. Power Rectifier: transforms 220 AC into 380 DC

4. 4 Location of hardware: plateform Maratons are inside the cavern: L3BXX U L3BXX M L3BXX L

5. 5 Location of hardware: plateform L3A01L3A11

6. 6 Location of hardware: B1B01 rack Second Rack behind barracks, first level

7. 7 Rack B1B01 Power rectifiers for C-side: corresponding MARATON is identified by a label on each box RCM Crate for C-side Power rectifiers for A-side: corresponding MARATON is identified by a label on each box RCM Crate for A-side

8. 8 How to switch on a crate from PVSS Execute:  G:\online\ecs\NewShortcuts\INFDAI\INFDAI1_UI_DEN.lnk (WINDOWS)‏  /group/online/ecs/NewShortcuts/INFDAI/INFDAI1_UI_DEN.sh (LINUX)‏ 1. Select « FSM » tab 2. Select and right click on the side where the crate is (C or A)‏ 3. Click on « View »

9. 9 1. Take Ownership clicking on the lock 2. Select « Switch ON » will switch ON all crates 1. 2. Double click to see details for one rack

10. 10 READY, OFF, or ERROR Double click to see details for one crate To switch on/off only one crate, click here and select switch on/off

11. 11 Single click to see detail for one channel

12. 12

13. 13 In case of problems In case of a DSS Alarm on the calo platform, power will be cut at the source (rack B1B01). Before being able to switch on the Maratons back:  Laurent (or DSS expert) has to be called to switch back on the power of the rack B1B01  The crate of the RCM has to be powered on manually going in the cavern  Power rectifiers have to be verified they are all ON

14. 14 In case of problems If one crate has to stay off for a given time (changing the boards inside, problem with the boards, etc...), to prevent from accidental switch on from PVSS:  Switch off manually the corresponding power rectifier  Write in the log book why Corrolary: if a rectifier is OFF, look in the logbook why before switching it ON.