ECR Title: ECR: Add direct wire connection between RT and EtherCAT systems	DCC No: E1300403-v1
Date: 5/8/2013
Requester: Daniel Sigg	Impacted Subsystem(s): ISC
Description of Proposed Change(s): Proposed changes: Add a direct wire connection between the real-time front end system and the EtherCAT slow controls system. - End stations: Allocate 1 ADC/DAC & DAC/ADC pair Use ADC 2 DB9_5 and DAC 1 DB9_2 - Corner station: Allocate 2 ADC/DAC & DAC/ADC pair Use ADC 3 DB9_3 and DAC 1 DB9_3
Reason for Change(s): This will allow the EtherCAT system to act as the state controller for the entire ALS locking sequence. This will also allow for a fast switch over between ALS and LSC.
Estimated Cost: Requires E1300402 9 Dual DSUB Breakout Panel (D1201450) ($2000) New wiring ($1200)
Schedule Impact Estimate: None.
Nature of Change (check all that apply): Safety Correct Hardware Correct Documentation	Improve Hardware Improve/clarify Documentation Change Interface Change Requirement
Importance: Desirable for ease of use, maintenance, safety Desirable for improved performance, reliability Essential for performance, reliability Essential for function Essential for safety	Urgency: no urgency desirable by date/event: __June 2013__ Essential by date/event: __HIFO_Y___ Immediately (ASAP)
Impacted Hardware (select all that apply): Repair/modify. List part & SNs: ______________________ Scrap & Replace. List part & SNs:_____________________ Installed units? List IFO, part & SNs: _________________ Future units to be built	Impacted Documentation (list all dwgs, design reports, test reports, specifications, etc.): D1100170, D1200666, E1200408, D1101904, D1100670, E1300151, D1002803, D1001459, T1100472
Disposition (to be completed by Systems Engineering): TRB CCB Approved Additional information required. Define: [Requester re-submits with new information with the same DCC E-number for the ECR but the next version number.] Concurrence by Project Management: (Acknowledged Electronically in DCC) Project Systems Engineer: Dennis Coyne Project Systems Scientist: Peter Fritschel