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2 Power supply
Nortel Secure Router 8012
Hardware Description
2-4 Nortel Networks Inc. Issue 5.3 (6 April 2009)
Table 2-3 Description of the indicators on the DC power supply module
Indicator Color Description
DC OK Green The DC input state indicator (only for the DC power
module).
Constant ON means the voltage input is normal (-48 V
to -60 V), and OFF means the voltage input is not
normal.
RUN Green The power module LED.
Constant ON means the power module runs normally,
and OFF means the power module has faults.
ALM Red The power module failure LED.
Constant ON means the power module has faults or is
not in position.
The running state of the power module is available from the indicators on the RPU front panel.
For more information, see Chapter 4, “Boards.”
2.2 Functions
On the Secure Router 8012, the two types of power modules (AC input and DC input) are
inserted into the backplane from the back.
In normal situations, two power modules work in 1+1 hot backup mode. The AC and DC
power modules are the PSR550-A and the PSR550-D respectively. The power line uses the
–48V feeder cable of D 3PIN.
The power module has the following functions:
z
When power input is interrupted or an error occurs with one power module, the other
module is not affected and can provide power to the entire system. If the system needs to
be powered off, you must power off all the configured power modules.
z
The power module provides protection functions, including input over-voltage protection,
input under-voltage protection, output over-flow protection, output over-voltage
protection, output short-circuit protection, and over-heat protection.
z
The power module supports the hot swap feature. Switching the power module does not
affect the running system.
If you want to install a Secure Router 8012 in the communication equipment room, make sure that the
power distribution cabinet can provide a lightning protection box or arrester against the current of 20 KA
and above.