Specifications

QSSC-S4R Technical Product Specification 850W Power Supply
105
A3 12VIBUS B6 PSALERT
A4 ILOCAL B7 PSON
A5 SCL B8 +15VCC
A6 SDA B9 PSKILL
A7 A0 B10 +3.3VSB
A8 A1 B11 +3.3VSB
A9 3.3VRS B12 +3.3VSB
A10 +3.3VSB P1 +12V RETURN
A11 +3.3VSB P2 +12V RETURN
A12 +3.3VSB P3 +12V
B1 VINGOOD P4 +12V RETURN
B2 ACRANGE P5 +12V
B3 PRESENT P6 +12V
12.3 AC Input Requirement
AC input connector is an IEC 320 C-14 15A/250VAC power inlet.
12.3.1 AC Input Voltage Specification
The power supply powers off if the AC input is less than 75VAC +/-5VAC range. The power supply starts up if the AC
input is greater than 85VAC +/-4VAC.
The power supply operates over the range and limits shown in the following table.
Table 45. AC Input Rating
Parameter Minimum Nominal Maximum Start Up VAC Power Off VAC
Voltage (115) 90 Vrms 100-127 Vrms 140 Vrms 85 VAC +/-4 VAC 75 VAC +/-5 VAC
Voltage (220) 180 Vrms 200-240 Vrms 264 Vrms
Frequency 47 Hz 50/60 63 Hz
12.3.2 Efficiency
The power supply has a minimum efficiency of 80% when operated under the maximum loading conditions at 90VAC-
240VAC.
12.3.3 Input Over-Current Protection
The power supply has internal primary over-current protection. A normal-blow (fast blow), highbreaking-capacity fuse is
placed in the input circuit.
12.3.4 Inrush Current
When input power is applied to the power supply, any initial current surge or spike of 10ms or less cannot exceed 55A
peak. Any additional inrush current surges or spikes in the form of AC cycles or multiple AC cycles greater than 10ms,
and less than 150ms, does not exceed a 25A peak.
For any conditions during turn-on, the inrush current does not open the primary input fuse or damage any other
components.
12.3.5 Auto Restart
Although the power supply may power off under the conditions mentioned in Sections 12.3.3 and 12.3.4, it is capable
of restarting, either automatically or under program control after the disturbance. In addition, the power supply will not
be in a latched state such that any of the operator buttons/buttons do not operate correctly after the disturbance. At no
time will the AC power cord have to be removed to clear an error condition.
Auto restart conditions are tested from -40% to -100% AC under-voltage conditions for time intervals ranging from
25ms to 2sec. For each time interval, all of the under-voltage conditions listed below will be tested. These tests are
performed at both the lowest and highest nominal operating voltages of the power supply. TBC
x Time intervals: 25ms, 40ms, 60ms, 90ms, 130ms, 200ms, 280ms, 400ms, 600ms, 900ms, 1.3sec, and 2.0sec
x Under-voltage deviation from nominal AC voltage: -40%, -50%, -60%, -70%, -80%, - 90%, -100%