Power Cooling Module - 2U Enclosures; 580W Pcm; Multiple Pcms - Lenovo ThinkSystem DS Series Hardware Installation And Maintenance Manual

Power cooling module – 2U enclosures
AC-DC power is provided by up to two auto-ranging Power Cooling Modules (PCMs) with integrated axial
cooling fans. The IOMs control fan speed. Also see
enclosure(s).

580W PCM

The 580W PCM voltage operating range is nominally 100V–240V AC, and operates at 50–60 Hz input frequency. The
isometric rear orientation in
enclosure rear panel.
PCM LEDs Inset
As shown on PCM in left-hand slot
580W Power Cooling Module LED descriptions (see inset illustration detail above)
PCM OK LED (Green)
AC Input Fail LED (Amber/blinking amber)
LED behavior
• If any of the PCM LEDs are illuminated amber, a module fault condition or failure has occurred.
• For a detailed description of PCM LED behavior, see
Figure 33 LEDs: 580W PCM – 2U enclosure rear panel
For a full frontal view of a PCM panel located on the enclosure rear-panel, see

Multiple PCMs

The 2U storage system includes two PCMs which provide redundant power control for the system so that if one
PCM fails, the other maintains the power supply, and enclosure operation is not affected while you replace the
faulty module.
Figure 33 shows the PCM aligned for insertion into the right-hand PCM slot located on the
"System airflow" (page 40)
PCM oriented for use in right-hand slot
Fan Fail LED (Amber/blinking amber)
DC Fail LED (Amber/blinking amber)
"580W PCM LEDs" (page
Power cooling module – 2U enclosures
for optimal cooling within the
96).
Figure 22 (page 30).
39