Keep Control: PULPO 2 ESO‘s new housekeeping unit Christoph Geimer, Claudio Cumani, Nicolas Haddad, Javier Reyes, Javier Valenzuela, Bernhard Lopez PULPO 1 BACK PANELPULPO 1 FRONT PANEL 6 temperature sensors PT100 3 independent heater circuits Shutter control Vacuum monitoring 1 alarm output simple RS 232 interface 33 units already build, very low failure rate Standard housekeeping unit at all optical ESO instruments THE BEST THING WE HAD TO OFFER - PULPO 1 NEW CHALLENGES - OmegaCAM PULPO 1 functionality plus: much more sensors (at least more alarm outputs data logging increased safety features

“Rule with your heart and live with your conscience” - QUEEN Interfacing to the world 29 PT100 temperature sensors by default, up to 125 via external multiplexers digital I/O control and power supply for external MUX board Vacuum monitoring (Balzers or Edwards gauges) seperated alarm outputs for vacuum and temperature (2 for each) fiber interface to SLCU additional standard RS 232 interface Ethernet connection for log data download and OPTO isolated shutter interface ( 1output, 4 inputs,2spares) 8 independent heater circuits (72W, +-0.1K accuracy) data logging capabilities with records self recovery “In the quiet of the night - let our candle always burn” - QUEEN

PULPO 2 Housekeeping the universe PULPO 2 in action Instrument connection point Temperature Alarm Vacuum Alarm SLCU 87 PT100 sensor for CCD’s, mosaic plate, shields, PCB temp. Alarm Dialer SLCU FIERA 1 DFE FIERA 2 DFE FIERA 3 DFE FIERA 1 PS FIERA 2 PS FIERA 3 PS COOLING CONTROLLER 486Core Top Heat Exchanger Bottom Heat Exchanger Active shield Sorption Pump Upper Level Filling Lower Level Filling +24V Thermal control & emergency pump Digital I/O RS232 Link Vacuum gauge Heater 1 Heater 2 Heater 3 Heater 4 MUX 1 MUX 2 MUX 3 MUX 4

Thanks Iris “PRINCES OF THE UNIVERSE” - QUEEN