1. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 1 Design, Manufacture, Transport and Integration on-site in Chile of ALMA Antennas POWER DISTRIBUTION PM#07 13-14 Sept 2006 First Page

2. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 2 UPS characteristics COMPLETION OF THE POWER DISTRIBUTION DESIGNING BOUND BY: 1.DEFINITION OF INTERFACES WITH FINAL CHOISE OF ANTENNA EQUIPMENTS (LINKED TO MANUFACTURERS); 2.ALMA EQUIPMENT CABLING INFORMATIONS NOT COMPLETE; 3.CONTROL DESIGNING UNDER DEFINITION MISSING ESO ANSWER ABOUT AEM INTERLOCK QUESTIONS.

3. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 3 CABLING PENDING (ANTD-80.04.00.00-019-A-PLA Cabling Installation Plan for AEM Antenna Contractor) 1.Paragraph 4.2 – “AMB bus cables” table - # 33 two cables listed passing by the Elevation cable Wrap as against the figure 1 where only one cable is signed; 2.Paragraph 4.2 – “RF, Ethernet and Telephone cables” table - # 43 the cable is signed passing by the Elevation cable Wrap against the figure 1 where is shown passing by the Azimuth cable Wrap; DEFINITION OF ALMA CABLES DEFINITION OF ELEVATION CABLE WRAP

4. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 4 Control and signal cables

5. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 5 CABLING PENDING (ANTD-80.04.00.00-019-A-PLA Cabling Installation Plan for AEM Antenna Contractor) 3.Paragraph 4.4.2 – “ Power cables to be bought by an ALMA IPT and installed by the antenna contractor ” table - #1 a 48VDC cable is signed and the same cable appears in the figure 2. This is in contrast with the statement of ESO- AEM TM32 del 21.07.2006 where the 48VDC supply seems to be eliminated with the statement: 9) "1" = spare # the 48VDC need has been dropped as not used anymore by ALMA DEFINITION OF ALMA CABLES HAVE THE ANTENNA CONTRACTOR TO PROVIDE A 48VDC POWER SUPPLIER?

6. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 6 CABLING PENDING (ANTD-80.04.00.00-019-A-PLA Cabling Installation Plan for AEM Antenna Contractor) 4.Paragraph 4.4.2 – “Power cables that are to be supplied and installed by the antenna contractor ” table - # 9a and 9b :  Analog Rack powered separately from Digital Rack?  Code connectors not equivalent with the rated current specified. DEFINITION OF CONDUITS INSIDE THE RECEIVER CABIN IDENTIFICATION OF CONNECTORS

7. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 7 Power cables

8. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 8 CABLING PENDING (ANTD-80.04.00.00-019-A-PLA Cabling Installation Plan for AEM Antenna Contractor) 5.Paragraph 4.4.2 – “Power cables that are to be supplied and installed by the antenna contractor ” table - # 9h : Information regarding power of Nutator Controller missing DEFINITION OF FEEDERS INSIDE THE CABINETS DEFINITION OF POWER BUDGET

9. Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 9 CABLING PENDING (ANTD-80.04.00.00-019-A-PLA Cabling Installation Plan for AEM Antenna Contractor) 6.Paragraph 4.4.2 – “Power cables that are to be supplied and installed by the antenna contractor ” table  # 7 : UPS FE Power supply (16A) signed to belong to the “Non-Critical Bus” (3) against its ICD and figure 2;  The figure 2 shows a cable (identification number 8) named “stable DC source” which connects the FE power supply to the FE but it is not included in the table. Is it a cable to be supplied by Antenna Contractor? Which kind of cable is it? DEFINITION OF CABLE LIST DEFINITION CONDUITS INSIDE THE RECEIVER CABIN