|
|
The Cisco 600W Redundant Power System (RPS) provides power system redundancy to external devices such as routers, switches, and hubs. The system includes two fully redundant AC input power modules and four DC output power modules for connection to external devices. The Cisco RPS supports quasi-redundant, fully redundant, or redundant-with-reboot configurations, depending upon the external device.
This chapter provides an overview of the Cisco RPS features, including the supported external devices and power configurations, in the following sections:
The following features are standard:
The Cisco RPS ships in either of the following configurations:
Table 1-1 lists the supported external devices and power configurations. The power configurations are described in the following subsections.
.
| External Device | Quasi- Redundant1 | Fully Redundant | Redundant with Reboot2 |
|---|---|---|---|
FastHub 400 series hubs3 | Yes | No | Yes |
Cisco 1516M hub (HP 10BaseT Hub-16M) | Yes | No | No |
Catalyst 1900 series switches | Yes | No | Yes |
Catalyst 2820 series switches | Yes | No | Yes |
Catalyst 2900 series XL switches | Yes | No | Yes |
Catalyst 3500 series XL switches4 | Yes | No | Yes |
Cisco 2500 series routers and access servers5 | Yes | Yes | No |
Cisco 2600 series routers | Yes | Yes | No |
Cisco 3620/3640 series routers | Yes | Yes | No |
Cisco MC3810 multiservice concentrator | Yes | Yes | No |
Cisco 4000 series routers | Yes | Yes | No |
The Cisco RPS provides a quasi-redundant power source for four external devices that use up to 150W DC each. This configuration is allowed for all supported devices. You can use a one-to-one cable (one connector at each cable end) to connect four external devices to the four DC output power modules, as shown in Figure 1-1. The power source is quasi-redundant because there are two AC input power modules for the Cisco RPS and one DC output power module for each external device. The AC input to the Cisco RPS is fully redundant, but the DC output to the external devices is not.
The Cisco RPS can provide a fully redundant power source for two of the supported routers or concentrators. You can use a two-to-one cable (ordered separately) to connect two external devices to the four DC output power modules, as shown in Figure 1-2. The two-to-one cable is a Y-shaped cable with two connectors at one end and one connector at the other end.
In this configuration, the connectors at one end of the Y-shaped cable connect to two Cisco RPS DC output power modules; the single connector on the other end of the cable connects to one external device. The power source is fully redundant because there are two AC input modules and two DC output power modules connected to each external device. If any power module fails, there is a full backup.
By using a mode of operation called redundant with reboot, you can connect more hubs and switches to the Cisco RPS and thereby extend its capacity or provide additional redundancy. Redundancy with reboot works for the following devices only: FastHub 400 series hubs, Catalyst 1900 and Catalyst 2820 series switches, and Catalyst 2900 and Catalyst 3500 series XL switches. However, this configuration is not generally recommended because a power supply failure will cause an interruption while the hub or switch reboots.
The redundant-with-reboot configuration is shown in Figure 1-3, where a straight-through one-to-one cable connects an external switch or hub to the Cisco RPS while the device is powered by its own internal power supply (the device AC power plug is connected).
In this configuration, one Cisco RPS can support four devices. The Cisco RPS and the external device internal power supply are both connected.
After power up, a sense circuit in the Cisco RPS reads that the device has its AC power connected and shuts the Cisco RPS output off, preventing competition between the power supplies.
Normally, the external device internal power supply always provides power. If the internal power system of the hub or switch fails, the device powers down briefly (for approximately 30 seconds) until the Cisco RPS begins supplying power. When the device comes back up, the Cisco RPS is the main power source.
In this configuration, if the Cisco RPS fails or is disconnected, the external device does not power cycle because its internal power supply has not been disturbed. When both the Cisco RPS and internal power supply are powered, the RPS LED on the external device blinks green, and the LED on the Cisco RPS front panel is dark because the RPS is not supplying power.
Despite 30 seconds of downtime that occur when using redundancy with reboot, this configuration does provide additional redundancy and extends the capacity of the Cisco RPS.
You can mix quasi-redundant and fully redundant configurations for supported devices. For example, two devices can be in quasi-redundant mode while one is in fully redundant mode (see Figure 1-4).
The LEDs on the RPS front panel show the RPS operational status. Figure 1-5 illustrates the front panel of the Cisco RPS.
The RPS rear panel has two AC power connectors, each with an on/off switch, and four DC connectors for connecting to devices. Figure 1-6 shows the rear panel. Refer to "Connection Requirements," for information about required cables and connectors.
The LEDs on the front panel of the Cisco RPS display the current operating condition of the Cisco RPS:
When the Cisco RPS is working properly, all LEDs on its front panel are solid green.
Figure 1-7 shows the RPS front panel LEDs, and Table 1-2 explains the meaning of the colors.
| LED Name | Color/State | Description |
|---|---|---|
Off | AC power is not being supplied to the Cisco RPS, or it is switched off. | |
| Amber | AC power is being supplied to the Cisco RPS, but the designated AC-input power module has failed. |
| Green | The AC-input power module is on and operating correctly. |
Off | Note The DC status LEDs are numbered to correspond to the DC-output connectors on the Cisco RPS rear panel.
The DC output is powered down at the external device, AC power is not being supplied to the Cisco RPS, or there is no output cable attached to the DC output module. | |
| Amber | The DC output power module has failed. Note The DC status LED is amber for 10 to 15 seconds after the DC output power module has been connected and the external device has been powered up before it turns green to indicate correct operation. Note If you are using an RPS with a revision level lower than Z3 with a Catalyst 3508G or a Catalyst 3548 XL switch, the switch RPS LED and the RPS DC LED of the connector for the switch might display amber (normally indicating an RPS malfunction) even when the RPS is functioning properly. The LEDs display correctly for RPS revision level Z3 or later. The label on the bottom of the RPS shows the revision. |
| Green | The DC output power module is on and operating correctly. |
Off | AC power is not being supplied to the Cisco RPS. | |
| Amber | One or more cooling fans has failed. |
| Green | All cooling fans are functioning correctly. |
Off | AC power is not being supplied to the Cisco RPS. | |
| Amber | The Cisco RPS internal temperature is exceeding the operating range. |
| Green | The Cisco RPS internal temperature is within the operating range. |
Follow these guidelines to guarantee general safety:
Safety warnings appear throughout this guide in procedures that, if performed incorrectly, might harm you. A warning symbol precedes each warning statement. (For information on safety warnings and translations, see "Notes, Cautions, and Warnings" in the "About This Guide" section.)
 | Warning Read the installation instructions before you connect the system to its power source. |
| Warning The device is designed to work with TN power systems. |
| Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. |
| Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Make sure that a fuse or circuit breaker is no larger than 120 VAC, 15A U.S. (240 VAC, 10A international) is used on the phase conductors (all current-carrying conductors). |
| Warning This equipment is intended to be grounded. Make sure that the host is connected to earth ground during normal use. |
| Warning Ultimate disposal of this product should be handled according to all national laws and regulations. |
Follow these guidelines when working on equipment powered by electricity:
Posted: Tue Dec 14 16:39:49 PST 1999
Copyright 1989-1999©Cisco Systems Inc.