Specifications

850W Power Supply QSSC-S4R Technical Product Specification
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12.4.10 Power Supply Module LED indicators
Figure 53. Power Supply Indicators
Table 51. Power supply indicators
LED LED Name Symbol Color/LED State Description
A DC Power
Redundancy status
Green – Blinking Cold Redundancy Mode
Green - On PSU on and running
B Power Supply Failures
and Warnings
Amber – Blinking PSU warning event operation continuing
Amber – On PSU critical even shutdown
C AC Power Supply
Input Status
Green – Blinking AC power not present
Green – On AC power present
12.4.10.1 Power Supply Fail
This amber LED is driven by internal circuitry and will illuminate when a power rail has failed. The LED should not be
illuminated if the supply turns off due to PS_KILL. The LED will illuminate even if the power supply is in a latched state.
The only time (during a fault) when it will not illuminate is if the +3.3Vsb is lost.
12.4.10.2 Power Good
This green LED is driven by internal circuitry and will illuminate whenever POWER GOOD is asserted.
12.4.10.3 AC OK
This green LED is driven by internal circuitry and will illuminate whenever VIN_GOOD is asserted.
12.5 Regulatory Agency Requirements
The power supply must have UL recognition, CSA or cUL certification to Level 3, or any NORDIC CENELEC-certified
(such as SEMKO, NEMKO or SETI) markings demonstrating compliance. The power supply must also meet FCC
Class B, VDE 0871 Level B, and CISPR Class B requirements.