Power Guidelines

Description	Design Specification
Power (input)	125 watts RMS¹
Source voltage range	90 to 264 VAC²
North America service minimum	15A
International service minimum	10A or 16A
Power Source Input (switches automatically by default)	110/120 or 220/240 VAC

Table 3-1: AC-Input Power Supply Specifications

Description Design Specification

Power (input)

125 watts RMS¹

Source voltage range

90 to 264 VAC²

North America service minimum

15A

International service minimum

10A or 16A

Power Source Input
(switches automatically by default)

110/120 or 220/240 VAC

¹RMS = root mean square
²VAC = volts alternating current

Supplemental Unit Bonding and Grounding Guidelines for AC input

Even though the Cisco ONS 15104 requires a safety earth ground connection as part of the power connections, we strongly recommend that you connect the central office ground system to the supplemental bonding and grounding receptacle bolt holes on the Cisco ONS 15104 chassis. A receptacle is located on the front flanges of the chassis, near the top edge of the chassis. (See Figure 3-2.) The receptacle consists of two round bolt holes surrounded by an area of bare metal.

Note The bonding and grounding receptacle is intended to satisfy the Bellcore NEBS requirements for supplemental bonding and grounding connections. If you are not installing the Cisco ONS 15104 in a NEBS environment, you can choose to bypass these guidelines and rely on the safety earth ground connection for the AC-input and DC-input power supplies.

Figure 3-2: Cisco ONS 15104 Bonding and Grounding Receptacles

Install proper grounding at the site to avoid damage from lightning and power surges.

To ensure a satisfactory supplemental ground connection, you will need the following parts:

One grounding lug, which has two M6 bolt holes with 0.625-0.75-in (15.86-19.05-mm) spacing between them and a wire receptacle large enough to accept a 4-AWG, or larger, multistrand copper wire. (See Figure 3-6.)

Note This grounding lug is not available from Cisco Systems; electrical-connector vendors, such as Panduit, provide this type of lug. The two hex-head M6 (metric) bolts are not available from Cisco Systems, but are available from any commercial hardware vendor.

Two M6 or equivalent hex-head bolts and locking washers (nickel-plated brass is ideal).

Note These bolts and locking washers are not available from Cisco Systems; they are available from any commercial hardware vendor.

Grounding wires—Although Cisco recommends at least 4-AWG multistrand copper wire, the actual wire diameter and length depend on your Cisco ONS 15104 location and site environment.

Note This wire is not available from Cisco Systems; it is available from any commercial cable vendor.

Connecting the AC Power Supply

Note Cisco recommends that you attach each AC-input power supply to a dedicated power source for redundancy and use an uninterruptable power supply (UPS) to protect against power failures. Each AC power supply operating between 200 VAC and 240 VAC requires a dedicated 20-amp electrical power service for North America (10-amp or 16-amp electrical power service for international specifications).

Use Figure 3-3 as a reference for the following procedure.

Figure 3-3: Connecting the Cisco ONS 15104 AC Power Supply

Perform the following procedure to connect or disconnect the AC power supply:

Step 1 Verify that the power switch on the Cisco ONS 15104 is in the OFF (0) position. (See Figure 3-3d.)

Step 2 Connect the AC power cord to the AC power supply receptacle on the Cisco ONS 15104. (See Figure 3-3a.)

Step 3 Close the spring clip over the power cord plug. (See Figure 3-3b.)

Step 4 Connect the other end of the AC power cord to the source AC receptacle. (See Figure 3-3c.)

Step 5 Turn the power switch to ON (|). (See Figure 3-3d.)

This completes the instructions to connect or disconnect the AC power supply. Proceed to the following section, "Verifying the AC Power Supply Installation."

Verifying the AC Power Supply Installation

To complete the installation, check the LEDs on the front of the Cisco ONS 15104 to verify that the power supply is operating properly. (See Figure 3-4.)

Figure 3-4: Cisco ONS 15104 LEDs

Perform the following procedure to verify AC power supply installation:

Step 1 Check the following components to make sure they are secure:

The AC power supply cord is connected to the power supply receptacle.
Each power cord is connected to a dedicated AC power source, if possible.
The spring clip is attached over the power cord plug.
The cord is securely attached to the AC power connector.

Step 2 Verify the power supply.

Step 3 Verify that the Cisco ONS 15104 powers on. Visually check that the green LED light signifies that the power supply is on.
This indicates that the AC voltage source is within the range of 90 to 264 VAC.

Step 4 Check the following areas for possible problems, if the power LED is off:

Verify that the source AC circuit breaker is on.
Verify that the AC power cord is firmly connected from the source AC receptacle to the power supply.
Verify that the Cisco ONS 15104 power switch is in the on position.

Step 5 Visually check the LEDs during startup.
If a failure occurs upon startup, the red system fail LED will come on, and the green system ready LED will flash to indicate that a failure has occurred.

Step 6 If the system fail LED goes on, turn the power off.

Unplug the power cord, and use a different AC power source, if possible. If a different AC power source is not available, reseat the existing AC power plug.
Turn the Cisco ONS 15104 power switch on. If the LEDs go on properly when the power supply is installed in a different AC power source, suspect a power supply failure or that the power supply has detected an overvoltage or overtemperature condition and has shut down.

DC-Input Power Supply Site Requirements

The DC power supply is used most often when the Cisco ONS 15104 is installed in a lab or a populated site with direct configuration access to routers and a PC terminal. If you plan to use a DC-powered Cisco ONS 15104 in an onsite network environment, place it near external electrical power devices that the Cisco ONS 15104 will use as a power source.

Caution Install proper grounding at the site to avoid damage from lightning and power surges.

DC-Input Power Supply Specifications

A DC-powered Cisco ONS 15104 is equipped with a single -40.5/-75 VDC central office (CO) power supply with redundant inputs from Battery A and Battery B. Table 3-2 lists the DC power supply specifications.

Table 3-2: DC Power Supply Specifications

Description	Design Specification
Power (input)	125W
Input power cable	commensurately rated wire gauge
Source voltage range	-40.5V to -75V

Note A Cisco ONS 15104 with a DC-input accepts wire gauges from 30 to 14 AWG.
A commensurately-rated wire gauge will be selected to connect power to the terminal block.

Supplemental Unit Bonding and Grounding Guidelines for DC Input

Even though the Cisco ONS 15104 requires a safety earth ground connection as part of the power connections, we strongly recommend that you connect the central office ground system to the supplemental bonding and grounding receptacle bolt holes on the Cisco ONS 15104 chassis. A receptacle is located on the front of the chassis, near the top edge of the chassis. (See Figure 3-5.) The receptacle consists of two round bolt holes surrounded by an area of bare metal.

Figure 3-5: Cisco ONS 15104 Bonding and Grounding Receptacles

Install proper grounding at the site to avoid damage from lightning and power surges.

To ensure a satisfactory supplemental ground connection, you will need the following parts:

One grounding lug, which has two M6 bolt holes with 0.625 to 0.75-inch (15.86 to 19.05-mm) spacing between them and a wire receptacle large enough to accept a 4-AWG, or larger, multistrand copper wire. (See Figure 3-6.)

Two M6 or equivalent hex-head bolts and locking washers (nickel-plated brass is ideal).

Note These bolts and locking washers are not available from Cisco Systems; they are available from any commercial hardware vendor.

Grounding wires. Although Cisco recommends at least 4-AWG multistrand copper wire, the actual wire diameter and length depend on your Cisco ONS 15104 location and site environment.

Note This wire is not available from Cisco Systems; it is available from any commercial cable vendor.

The grounding lug should be dual-hole and able to fit over M6 terminal studs at 0.625-inch (15.88-mm) centers. (For example, Panduit part number LCD8-14A-L, or equivalent.) Figure 3-6 shows the type of lug required for the DC-input cable connections.

Figure 3-6: Grounding Lug

Connecting the DC Power Supply

Warning An On or Off switch or a disconnect device is not provided on the Cisco ONS 15104 with direct current (DC) power. A readily accessible disconnect device, such as a circuit breaker, shall be incorporated into the fixed wiring.

The installed DC power supply located on the far right of the Cisco ONS 15104 chassis has a terminal block. The Cisco ONS 15104 with a DC power supply provides power redundancy. The wires that you install from two external DC power sources are the Cisco ONS 15104's power source. Therefore, if you lose the DC power source on Bus B, Bus A will continue to power the
Cisco ONS 15104.

Figure 3-7: DC Power Supply on the Cisco ONS 15104

Perform the following steps to connect the DC power supply as shown in Figure 3-7.

Step 1 Verify that the circuit breaker at the power source for the Cisco ONS 15104 is in the off position.

Step 2 Attach the ground wire to the ground screw on the front of the unit with the three washers and two nuts. (See Figure 3-7.)

Step 3 Ensure that the ground safety does not interfere with other hardware and then tighten the nuts.

Step 4 Prepare the other end of the grounding wire and connect it to the appropriate grounding point at your site to ensure an adequate earth ground.

Step 5 Locate the source wires from the two external electrical power devices that you want to configure with the Cisco ONS 15104.

Step 6 Use the wire strippers to strip 3/8 of an inch of the wire cover from each source.

Note

Step 7 Insert the stripped wire from each external electrical power into the appropriate hole in the terminal block.

Step 8 Use the 3/16 flat blade screwdriver to tighten the screws on the DC terminal block.

Step 9 Turn the circuit breaker on the power source to power on the Cisco ONS 15104.

This completes the instructions to connect the DC-power supply. To verify the installation proceed to the following section, "Verifying the DC Power Supply Installation,".

Verifying the DC Power Supply Installation

To verify that the power supply is operating properly perform the following procedures:

Step 1 Check the following components to make sure they are secure:

Each source wire is connected to a hole in the DC terminal block.
The source wires are securely tightened to the DC terminal block.

Step 2 Verify that the Cisco ONS 15104 powers on.
The green power LED indicates that the power supply is on, and the DC voltage source is within VDC range.

Step 3 If the power LED is off, check the following areas for possible problems,:

Verify that the source DC circuit breaker is on.
Verify that the Cisco ONS 15104 power switch is in the on position.
The source wires are securely tightened to the DC terminal block.

Step 4 Visually check the LEDs during startup. If a failure occurs upon startup, the red system fail LED will come on, and the green system ready LED will flash to indicate that a failure has occurred.

Step 5 If the system fail LED goes on, turn the power source off and do the following:

Disconnect each source wire from the DC terminal block, and verify that the source device has power. If each source device works correctly, reconnect each source wire in the DC terminal block.
Turn the Cisco ONS 15104 power source switch on. If the LEDs go on properly, suspect that the power supply has detected an overvoltage or overtemperature condition and has shut down.

Table of Contents

Power Guidelines