2-7
Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0
Chapter 2 Preparing for Installation
AC-Input and DC-Input Power Guidelines
AC-Input and DC-Input Power Guidelines
The wide-input AC-input power supplies in the Cisco 7500 series routers use a power factor corrector
(PFC) that allows the router to operate on input voltage and current within the AC-voltage range of 100
to 240 VAC and 50 to 60 Hz.
In Chapter 1,
Table 1-1
(for the Cisco 7505),
Table 1-2
(for the Cisco 7507),
Table 1-3
(for the Cisco
7507-MX),
Table 1-4
(for the Cisco 7513),
Table 1-5
(for the Cisco 7513-MX), and
Table 1-6
(for the
Cisco 7576) list system power specifications, including input voltage and operating frequency ranges.
The power supplies in the Cisco 7507, Cisco 7507-MX, Cisco 7513, Cisco 7513-MX, and Cisco 7576
routers have two safety interlock features as shown in
Figure 2-4
. A locking device on each power supply
prevents the power supply from being removed from the chassis when the power supply switch is on.
When the switch is in the on (|) position, a metal locking device extends into a slot in the chassis. When
the switch is in the off (O) position, the locking device is raised and clears the slot. Also, a retention clip
prevents the AC-input power supply power cable from being accidentally pulled out of the power supply
socket.
For additional power supply information, see the
“AC-Input and DC-Input Power Guidelines” section on
page 2-7
. Check the power at your site before installation and periodically after installation to ensure
that you are receiving clean power; install a power conditioner if necessary. We recommend that you
install a power conditioner between the AC power source and the router to help avoid problems caused
by power spikes and brownouts, and to help protect against equipment damage from lightning strikes.
We also recommend an uninterruptible power source (UPS) for the router to protect against power
failures at your site.
Warning
This equipment is intended to be grounded. Ensure that the host is connected to earth ground during
normal use.
Figure 2-4
Power Supply Safety Interlocks (Cisco 7507 AC-Input Power Supply Shown)
Cisco 7505 Power Considerations
The single 600W wide-input AC-input power supply for the Cisco 7505 router uses a power factor
corrector (PFC) that allows the Cisco 7505 to operate on input voltage and current within the range of
100 to 240 VAC and 50 to 60 Hz.
Safety interlock
switch
Locking device
in ON and
locked positions
I
O
H1315a
Cable-retention clip
