Chapter 1: Overview 1-23Power SupplyThe power supply provides power to the 7403 Terminal, as well as various retailperipherals through the powered connectors. The power supply is controlled by alogical on/off switch, which permits it to be disabled through software.Other features include:• Auto sensing for 115 VAC/230 VAC operation• Cooling fanFunctionally, the terminal’s ON/OFF switch controls the power supply control logic toactivate the power supply. This switch does not control actual AC mains voltageapplied to the power supply.AC Input The power supply operates with the following voltage ranges.Range NominalVrmsMinimumVrmsMaximumVrmsInput CurrentMax. ArmsLow (115) 100-127 90 136 5.0 AHigh (230) 200-240 180 265 3.0 ADC Outputs The power supply has the following DC outputs:Voltage +3.3 V +5 V +12 V -12 V +5 VSB +24 VMinimumCurrent0.7 A 1.0 A 1.35 A 0.0 A 0.0 A 0.2 AMaximumCurrent4.0 A 5.0 A 15.0 A 0.25 A 2.0 A 1.4 ANote: The total continuous output power for all rails (3.3V, 5V, 12V, -12V, 5VSB, 24V)should not exceed 265W.Maximum Rated Output PowerThe maximum rated output power as defined as the continuous load is 265W.However, in the 7403, this power supply will be limited to supporting around 200W,to minimize thermal impact to the system.
