Dell EMC ME4 Series Owner's Manual page 15

Figure 17. Expansion module detail ME412/ME424/ME484
1 Serial port
3 Disabled SAS expansion port B
NOTE: RBOD/EBOD configurations
• When the expansion module shown in
controller modules for adding storage, its middle HD mini-SAS expansion port ("B") is disabled by the firmware.
• The Ethernet port on the expansion module is not used in controller/expansion enclosure configurations, and is disabled.
Power cooling module
Figure 18. Power cooling module (PCM)
enclosures. The PCM includes integrated cooling fans. The example shows a PCM oriented for use in the left PCM slot of the enclosure
rear panel.
Figure 18. Power cooling module (PCM)
1 PCM OK LED (Green)
3 Fan Fail LED (Amber/blinking amber)
5 On/Off switch
7 Release latch
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 17. Expansion module detail ME412/ME424/ME484
shows the power cooling module (PCM) used in controller enclosures and optional expansion
580W PCM
2 SAS expansion ports
4 Disabled Ethernet port
2 AC Fail LED (Amber/blinking amber)
4 DC Fail LED (Amber/blinking amber)
6 Power connect
LEDs.
is used with ME4 Series
Storage system hardware 15