ClearCube R-Series Data Center Products - Manual (Page 57)

R-Series Data Center Products User’s Guide Chassis and Blade Installation • 33
The PSUs are factory-installed, field-replaceable units. Each PSU has a green LED
visible through the fan pack that indicates its powered-on status. If one of the PSUs
fails, the DC POWER status LED on the RMM turns red to indicate a failure, and the
green LED on the failed power supply turns red.
The DIM allows providing redundant power inputs. For best reliability, attach a power
cord to both receptacles, and plug the cords into separate power sources. When using
only one power source, plug it into the receptacle labeled A for best reliability. The
DIM is not hot-swappable. Fuses on the DIM can be accessed by powering down the
chassis and removing the fan module.
Figure 22 R4300 Power Modules
Connecting Cables
This section provides an overview of inter-chassis connections.
The R4300 or R4200 link the blades within each chassis to their respective user ports
and to control signals. In addition to the user port connections, signal paths include:
• Control Chain – The RS-485-based control and management chain between
chassis. A Control Chain contains one Primary controller—either an RMC or an
RMM. When an RMC is present in a Control Chain, it always asserts itself as
CAUTION: DOUBLE POLE/NEUTRAL FUSING
The DIM employs fuses in both the neutral and hot lines. Please contact
ClearCube or a ClearCube-certified technician for assistance with
servicing or replacing these modules or replacing the fuses in them.
NOTE
If you choose to use pre-assembled cables, be sure that the
cables for the desktop employ and terminate all four twisted
pairs. Standard Ethernet works with only two of the four pairs
connected, but the ClearCube C/Port operates only when all
four pairs of wire are used.
Dual AC Input Module
(DIM)
Fuses Power Supply Unit
(PSU)