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Chapter 1: Overview of the Chassis and Power Supplies
Power Supply Interfaces (Opto-couplers)
LED
30
The chassis has two power supply interfaces, also referred to as opto-
couplers, in the lower right corner of the rear panel. Refer to Figure 9. The
interfaces, labeled Power Supply Interface, are used by the active master
controller card to obtain status information from the power supplies.
Figure 9. Power Supply Interfaces (Opto-couplers)
The active controller card uses the top interface to communicate with the
power supplies in slots A and C, and the bottom interface to communicate
with the power supplies in slots B and D.
The power supply interfaces are not hot swappable and should only be
serviced by an authorized service technician.
Each interface has one LED, labeled Power. The LED is described in
Table 5.
Table 5. Power Supply Interface LED
LED
State
Solid Green
Power
Off
Description
The interface is operating normally.
The possible states of the LED are listed
here:
- The corresponding power supply slots of
the interface are empty.
- The power supplies in the power supply
slots are powered off or have failed.
- The power supplies are powered on and
functioning normally, but the power supply
interface has failed.
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