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 inFigure 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)
I
O
H1315a
| | Safety interlock | Locking device |
| | in ON and |
Cable-retention clip | switch | locked positions |
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.
Cisco 7500 Series Installation and Configuration Guide
