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 UTILITY MODULE PM# Jun 2006

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 2 The Utility Module Purpose: Deliver to the Alma Station critical antenna status signals with out passing throw the ACU.

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 3 Fire Alarm Status Emergency Stops AC Power off UPS Power off Stow Monitor Over Temperature Alarm HVAC System Alarm Zenith pointing Back End 48 VDC Signals to be monitored:

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 4 Emergency Stop Remote Set. Command to be executed

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 5 Utility Module Fire Alarm AC power status (MCR) Emergency Stops UPS Status STOW Position Over Temperature ? Zenith Position HVAC Back end 48 VDC power supply EN Switch Fiber

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 6 MONITOR Fire Alarm : Contact closure directly to the utiltiy module from a battery operated fire alarm. Emergency-stop : Contact closure directly to the utility module if any E-Stop button is pushed. AC Power OFF : Contact closure directly to the utility module in the event the AC power is off. UPS Power OFF : Same as AC Power OFF. STOW Monitor : Contact closure if the stow pin is in. Over temperature alarm: This signal is not clear to what refers; ESO SHALL CLARIFY this item. HVAC alarm: contact closure in case of the HVAC fault. Zenith Pointing: Contact closure when the antenna is pointing to Zenith. Back End 48 VDC: Contact closure if the 48VDC is off. COMMAND Remote set of the Emergency Stops: Contact closure directly to the emergency stop activator in the power distribution cabinet. The comand must be held to keep the e-stop off. Once the signal is release the E-stop will be reseted, but the antenna will not move.