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PSD 185OEM Power SupplyThe PSD 185 Deuterium Lamp Power Supply is a highperformance, low cost, compact and highly reliableswitching power supply. It is designed to operate on a 24VDC input voltage. The supply has very low noise and driftcharacteristics and uses a novel ignition circuit (US patentNo.5.530.319; EP No. 94 118 802.1) to ensure a soft andreliable arc ignition, even when the lamp is hot. All Heraeus30 W Deuterium Lamps with 2 V, 2.5 V, 10 V and 12 Vstabilized direct current heaters can be operated in theoptimum manner, to achieve maximum output stability andlifetime. The PSD 185 is also suitable for most lamps madeby other manufacturers. The power supply is fully automatic,from lamp ignition to steady-state operation. The small sizefacilitates OEM integration of the power supply and lamp in acompact system, for flexibility and reduced cost.Automatic Lamp Operating SequenceAutomatic lamp ignition is started by connecting the external24 VDC input voltage to the PSD 185 power supply. Thelamp heater is then pre-heated (warm-up cycle) for a periodof 10 seconds. After this, the strike voltage is applied andwhen the lamp strikes, the heater voltage is automaticallyadjusted to a preset level between 0 to 6 V depending on thelamp type used. Should the lamp not strike immediately,then further attempts are made automatically. The supply ispreset to run the lamp at an anode current of 300 mA. Anoptional disable control is available by applying an external 5VDC to the “disable” input.Features• Low cost, compact OEM design• Soft and reliable ignition including hot-lamp restrike• Provides optimum output and lifetime forHeraeus direct current heater Deuterium Lamps• Fully automatic from lamp start-upto steady-state operation• Heating voltage 2, 2.5, 10 and 12 V• Anode current 300 mA• Input voltage 24 VDC10086.410086.46.8 6.8 36 364 486,410086,41006.86.84 x M 3 4 x M 3