Instruction manual

1. Components Overview
55
(2) Panel Layout
The front layout and back layout are shown in Figure 1-56 Front Layout and Figure 1-57 Back Layout, respectively.
The numbers in the figure correspond to those in Table 1-27 LED Indications, Switches and Connectors.
Figure 1-56 Front Layout
Figure 1-57 Back Layout
Table 1-27 LED Indications, Switches and Connectors
Number Name Type Description Details
(1) POWER Green LED Indicates the power supply
status.
Lit in green : Powered-on. Electrical power is
output to the mounted power
supply modules.
Off : Input power failure to the EPU or
powered-off.
(2) DC-OK Green LED Indicates the power output
status from the power supply
modules.
Lit in green : Normal output from the power
supply modules.
Off : Output power failure from the
power supply modules or
powered-off.
(3) DC-FAIL Red LED Indicates the power output
status from the power supply
modules.
Lit in red : Output power failure from the
power supply modules.
Off : Normal output from the power
supply modules or powered-off.
(4) AC-OK Green LED Indicates the power input
status to the power supply
modules.
Lit in green : Normal input to the power supply
modules.
Off : Input power failure to the power
supply modules or powered-off.
(5) EPU 1 Connector Stand-by power supply
connector 1
To output electrical power from the power supply
module mounted in slot 1.
Connect the stand-by power supply cable bundled with
the EPU to the stand-by power supply connector on the
back face of the switch.
(6) EPU 2 Connector Stand-by power supply
connector 2
To output electrical power from the power supply
module mounted in slot 2.
Connect the stand-by power supply cable bundled with
the power supply module to the stand-by power supply
connector on the back face of the switch.