Cisco NCS 6008 LCC Instruction Manual

Installing Power Components
This chapter describes how to install the Cisco NCS 6008 LCC power components.
For information about removing power components, see the "Removing the Power Components” section.
Note
•Power System Overview, on page 1
•Installing Power Components, on page 10
•Powering On and Powering Off the LCC, on page 27
Power System Overview
The LCC power system is made up of six AC or DC power trays that contain AC or DC PMs.
Basic Chassis Power Information
The Cisco NCS 6008 LCC can be configured with either an AC input power system or a DC input power
system. Site power requirements differ, depending on the source voltage used.
For information about power safety requirements, see the Regulatory Compliance and Safety Information for
the Cisco Network Convergence System 6000 Series Routers guide.
Follow these precautions and recommendations when planning power connections to the LCC:
• Check the power at your site before installation to ensure that you are receiving clean power (free of
spikes and noise). Install a power conditioner, if necessary.
• Install proper grounding to avoid damage from lightning and power surges.
There are two types of power trays: an AC tray and a DC tray. An AC power tray houses up to three AC PMs,
while a DC power tray houses up to four DC PMs. It is required that you use only one type of power tray,
either AC or DC, in a LCC at a time.
Bonding and Grounding Guidelines
The LCC has two safety earth ground connections. The LCC allows you to connect the central office ground
system or interior equipment grounding system to either of the two grounding points on the rear side of the
Installing Power Components
1

LCC. Threaded ground inserts are located on a rear panel near the top of the LCC (above the power trays)
and near the bottom of the LCC. The grounding points are also referred to as Network Equipment Building
System (NEBS) bonding and grounding points.
Figure 1: NEBS Bonding and Grounding Points—Rear Side of LCC
NEBS bonding and
grounding point (upper)
2NEBS bonding and
grounding point (upper)
1
These bonding and grounding receptacles are provided to satisfy the Telcordia NEBS requirements for bonding
and grounding connections.
Note
Do not remove the LCC ground cable unless the LCC is being replaced.
Caution
AC Power System
Each AC-powered LCC contains six AC power trays. The upper three AC power trays are contained within
power shelf 0 (PS0), and the lower three AC power trays are contained within power shelf 1(PS1). Each power
shelf has a Power bus Control Module (PCM) with its own 1/0 power switch. Each AC power tray can contain
up to three AC PMs. The AC power trays and PMs are field replaceable.
Each inserted AC PM requires a single-phase, 50 to 60 Hz, 200 to 240 VAC input. Input current is variable
and based on facility minimum voltage. For N+N redundancy, power feeds A must power the upper three AC
Installing Power Components
2
Installing Power Components
AC Power System

power trays and power feeds B must power the lower three AC power trays. Not all of the PM bays need to
be filled.
The AC power system requires single-phase AC input power to each inserted PM. If you have 3-phase AC
Delta or AC Wye at your equipment, a Cisco NCS power distribution unit (PDU) is required to convert
3-phase AC input power to single-phase AC input power system.
If you have a 3-phase AC PDU installed, we recommend that you install three AC PMs in each AC power
tray to maintain a balanced 3-phase power load.
Note
We recommend that you use appropriate short-circuit protection in compliance with national and local electrical
codes.
Note
AC Power Distribution Unit
The AC PDU converts 3-phase AC input power to single-phase AC input power that connects directly to the
rear of each PM. The AC PDU includes either an AC Delta (NCS-PDU-DELTA) or AC Wye (NCS-PDU-WYE)
power interface, and has power input and power output cords entering and exiting the box.
Figure 2: Cisco NCS-PDU
Output cord4Rack mounting ears1
Two PDUs5Rack tray2
Input cord3
Installing Power Components
3
Installing Power Components
AC Power Distribution Unit

For detailed information on AC PDUs, see the Cisco CRS 3-Phase AC Power Distribution Unit Installation
Guide .
Mounting the AC PDU
The AC PDU mounting bracket holds three AC PDUs. An AC PDU mounting bracket can be attached to the
left and right sides of the LCC. The mounting brackets are attached to the chassis sides with the existing
screws that hold the side panels on. The PDUs are attached to the mounting brackets with four M5 screws
per AC PDU.
Figure 3: AC PDU Bracket Attached to the Side of the LCC
AC PDUs1
Bracket2
Optionally, you can mount the AC PDU in an external 19-inch rack by using six pan-head screws.
Installing Power Components
4
Installing Power Components
Mounting the AC PDU

Figure 4: Mounting the AC PDU in an External 19-Inch Rack
Tie-Down Bar and Cable Clamps
A 19-inch tie-down bar can be used to add strain relief for input power cables from the AC PDUs or cables
routed from a raised floor. The following figure shows holes for two 10-32 x 0.50 inch screws that are
pre-drilled on the top cap for attaching a tie-down bar.
Figure 5: 19”Tie-Down Bar
Optionally, you can install cable clamps on the top of the LCC to secure multi-fiber cables to the LCC. We
recommend installing two cable clamp brackets with two stacked clamps on each bracket (four clamps for
each trough), however you can configure the number of clamps according to your configuration.
Installing Power Components
5
Installing Power Components
Tie-Down Bar and Cable Clamps

The tie-down bar and cable clamps are not supplied by Cisco. You can order these parts from a commercial
vendor such as Panduit (see http://www.panduit.com).
Note
Figure 6: Optional Cable Clamps for Multi-Fiber Cables
Cable clamps1
DC Power System
Each DC-powered LCC contains six DC power trays. The upper three DC power trays are contained within
power shelf 0, and the lower three DC power trays are contained within power shelf 1 (Each power shelf has
a PCM with its own 1/0 power switch) Each DC power tray can contain up to four DC PMs. The DC power
trays and PMs are field replaceable.
For N+N redundancy, power feeds A must power the upper three DC power trays and power feeds B must
power the lower three DC power trays. Not all of the PM bays need to be filled.
This table lists the DC input current and voltage specifications.
Installing Power Components
6
Installing Power Components
DC Power System

Table 1: DC Input Current and Voltage Information
–48 VDC or –60 VDC (tolerance range: –40 to –72 VDC)Nominal input voltage
50 A maximum at –48 VDC
40 A maximum at –60 VDC
60 A maximum at –40 VDC
Input line current
Each wiring block on the DC power tray contains two sets of terminals, one positive and one negative, and
is covered by a plastic terminal block cover that is secured by a screw to a torque of 5 to 7 in-lb (0.56 to 0.79
N-m). Each DC power cable is connected to a power tray with a torque of 45 to 55 in-lb (5.1 to 6.2 N-m).
The terminal block supports 2-6-AWG input wire.
The cable should be sized according to local and national installation requirements. Use only copper cable.
An “allpole” separation of the power source is not required. The DC PM is an isolated DC/DC converter with
no galvanic connection between “L+” and the LCC. In addition, the “L+” potentials of each PM are isolated
from each other.
Note
The power supply terminal posts are centered 0.63 inches (16 mm) apart and are 1/4-20 thread. We recommend
that you use an appropriately sized 90-degree angle, industry-standard, dual-hole, standard barrel compression
lug.
Installing Power Components
7
Installing Power Components
DC Power System

Figure 7: 90-Degree Angle Standard Barrel Compression Lug
DC Input-Power-Present LEDs
The DC input-power-present LED provides a visual indication that there is voltage present across the input
terminal connection. The DC input-power-present LED starts to light up when the input voltage reaches –20
VDC, gets brighter as the voltage increases, and is fully lit when the input voltage reaches –48 VDC.
Power should be disconnected before servicing the input power connection.
Note
Installing Power Components
8
Installing Power Components
DC Input-Power-Present LEDs

If the input voltage polarity is reversed, or if the LED circuit fails, the LED will not light. In this case, service
personnel should check for hazardous voltages before working on the system.
Caution
Figure 8: DC Power Module Status Indicators
ON when input voltage is present
and within the correct range
Input OK LED1
ON when output voltage is presentOutput OK LED2
ON when an internal fault has
occurred on the PM
Fault LED3
AC Input-Power-Present LEDs
The AC input-power-present LED provides a visual indication that there is voltage present across the input
terminal connection. The AC input-power-present LED lights up when the input voltage reaches within the
acceptable range.
Installing Power Components
9
Installing Power Components
AC Input-Power-Present LEDs

Power should be disconnected before servicing the input power connection.
Note
Figure 9: AC Power Module Status Indicators
ON when input voltage is present
and within the correct range
Input OK LED1
ON when output voltage is presentOutput OK LED2
ON when an internal fault has
occurred on the PM
Fault LED3
Installing Power Components
This section describes how to install power components in the Cisco NCS 6008 LCC.
Installing Power Components
10
Installing Power Components
Installing Power Components

Although there are differences between the AC and DC power trays and PMs, they are installed using the
same procedures.
Note
We recommend that you install the power components in the order outlined in this section.
Installing the LCC Ground Cable
This section describes how to install a ground cable to either NEBS bonding and grounding point on the rear
of the Cisco NCS 6008 LCC.
Required Tools and Equipment
• Ground lug
• Ground cable
• Crimping tool and lug specific die
• 3/8-inch drive socket wrench
• 10-mm 6-pt. socket
• 3/8-inch drive torque wrench rated to include 30 in-lb (3.39 N-m)
To ensure a satisfactory ground connection, you also need the following:
•One 180-degree angle (straight) grounding lug that has two M6 bolt holes with 0.63 inch (16 mm) spacing
center to center between them, and a wire receptacle able to accept a 2-6-AWG multistrand copper wire
(see below figure).
• Four M6 bolts with integrated square cone locking washers (shipped pre-installed on the LCC, two at
each grounding point).
• We recommend 2-6-AWG multistrand copper ground cable. This cable is not available from Cisco; it is
available from any commercial cable vendor such as Panduit (see http://www.panduit.com ). The cable
should be sized according to local and national installation requirements.
The DC return of this system should remain isolated from the system frame and LCC (DC-I: Isolated DC
Return).
Note
Installing Power Components
11
Installing Power Components
Installing the LCC Ground Cable

Figure 10: 180-Degree Angle Straight Barrel Grounding Lug
Steps
To attach the ground cable to the LCC, perform the following steps:
Step 1 Use the crimping tool mandated by the lug manufacturer to crimp the lug to the ground cable.
Step 2 Use the socket wrench to attach the lug and ground cable to either grounding point (see below figure).
The two bolts below each NEBS bonding and grounding point are required for proper bonding and grounding
of the LCC and should not be removed.
Note
Figure 11: Attaching to Either NEBS Bonding and Grounding Point
Step 3 Use the torque wrench to tighten the bolts to a torque of 30 in-lb (3.39 N-m).
Step 4 Connect the other end of the ground cable to a grounding point at your site, according to site requirements.
Installing Power Components
12
Installing Power Components
Steps

Installing an AC or DC Power Tray (Preinstalled)
AC or DC power trays are preinstalled in the shipped LCC. During normal operation, they should not have
to be removed. However, they are field serviceable units (FRUs). If they need replacement, see the “Removing
an AC or DC Power Tray” section.
This section describes how to install an AC or DC power tray in the Cisco NCS 6008 LCC. Although there
are differences between AC and DC power trays, they are installed by using the same procedures as described
below. Once they are installed into a LCC that is properly grounded, external grounding to the power tray is
not needed.
The following figures show the front and rear of an AC power tray.
Figure 12: AC Power Tray—Front View
Figure 13: AC Power Tray—Rear View
The following figures show the front and rear of a DC power tray.
Installing Power Components
13
Installing Power Components
Installing an AC or DC Power Tray (Preinstalled)

Figure 14: DC Power Tray—Front View
Figure 15: DC Power Tray—Rear View (Clear Plastic Safety Cover Removed)
Prerequisites
Before you reinstall an AC or DC power tray, do the following:
• Power off the power shelf that houses the power tray you are about to install by using the 1/0 power
switch on the respective PCM.
• Completely power off the entire system at the supply circuit breakers before installing a power tray.
• Remove the top grilles from both the front and rear sides of the LCC, if installed.
• Ensure the power tray you are about to install is empty. Do not install a power tray into the LCC with
PMs already installed in the power tray.
The I/O switch on each power shelf only disables the output of the PMs in that shelf. The inputs to the PMs
remain hot, as well as the system’s internal busbar (due to the other power shelf).
Caution
Installing Power Components
14
Installing Power Components
Prerequisites

Required Tools and Equipment
• Four M4 x 10 mm screws per power tray
• 6-inch, number-2 Phillips screwdriver
• Torque screwdriver with number-2 Phillips head and torque rated up to 55 in-lb (6.2 N-m)
• AC or DC power tray
• AC power tray (Cisco PID NCS-AC-PWRTRAY=)
• DC power tray (Cisco PID NCS-DC-PWRTRAY=)
Steps
To install an AC or DC power tray, perform the following steps:
Step 1 Using two people, one to support the power tray underneath and the other to keep it steady, lift the power tray up and
slide it partially into a power tray slot on the front side of the LCC.
Because of the weight of a power tray, 20 lb (9 kg), and the height at which a power tray is installed in the
LCC, you should be especially careful while removing and carrying a power tray. To prevent injury, avoid
sudden twists or lateral moves.
Caution
Step 2 Grasping both handles simultaneously, push both the left and right handles in at the same time to push the tray into the
LCC. Slide the tray all the way into the LCC, until both power tray handles hook around the pins.
Use care not to bend the handles.
Caution
Installing Power Components
15
Installing Power Components
Required Tools and Equipment

Figure 16: Installing a Power Tray into the LCC
Step 3 Use the screwdriver to tighten the four M4 x 10 mm screws that attach the power tray to the LCC.
Step 4 Use the torque screwdriver to tighten the four screws to a torque value of 15 in-lb (1.69 N-m) to 20 in-lb (2.26 N-m).
The screws that attach a power tray to the LCC are relied upon for power tray bonding and grounding.
Note
Installing an AC or DC Power Module
This section describes how to install AC or DC PMs into power trays in the Cisco NCS 6008 LCC. Although
there are differences between the AC and DC PMs, they are installed using the same procedures.
The following figures show the front and rear of the AC PM.
Installing Power Components
16
Installing Power Components
Installing an AC or DC Power Module

Figure 17: AC Power Module—Front View
Figure 18: AC Power Module—Rear View
The following figures show the front and rear of the DC PM.
Installing Power Components
17
Installing Power Components
Installing an AC or DC Power Module

Figure 19: DC Power Module—Front View
Figure 20: DC Power Module—Rear View
Each PM has three status LEDs located on the front left side of its faceplate. See the follow table for the
meaning of each status LED.
Installing Power Components
18
Installing Power Components
Installing an AC or DC Power Module

Figure 21: AC and DC Power Module Status LEDs
Input OK LED1
Output OK LED2
Fault LED3
Table 2: Power Module LED Status Indicator Lights
MeaningColorLED Name
• On: The input voltage is present and within regulation range.
• Blinking: The input voltage is present but out of regulation range.
• Off: The input voltage is not present.
GreenInput OK
• On: The output voltage is on.
• Blinking: The PM is in a power limit or Over Current condition.
• Off: The output voltage is off.
GreenOutput OK
Installing Power Components
19
Installing Power Components
Installing an AC or DC Power Module

MeaningColorLED Name
• On: An internal fault is detected within the PM.
• Off: No internal faults detected on the PM.
RedFault
Prerequisites
•Installing the LCC Ground Cable, on page 11
•Installing an AC or DC Power Tray (Preinstalled), on page 13
Do not attempt to install the PM until the power tray is in place and screwed into the LCC.
Caution
Related Topics
Installing an AC or DC Power Tray (Preinstalled), on page 13
Required Tools and Equipment
• ESD-preventive wrist strap
• 6-inch, number-1 Phillips screwdriver
• Torque screwdriver with number-1 Phillips bit and rated torque at 5.5 in-lb (0.62 N-m)
• AC or DC PM
• AC PM (Cisco PID PWR-3KW-AC-V2)
• DC PM (Cisco PID PWR-2KW-DC-V2)
Steps
Power modules are keyed to prevent incorrect insertion.
Note
To install a PM into a power tray, go to the front of the LCC and perform the following steps:
Step 1 Attach the ESD-preventive wrist strap to your wrist and connect its leash to the ESD connection socket on the front side
of the LCC (see Preventing Electrostatic Discharge). You can also connect the ESD-preventive wrist strap leash to any
bare metal surface on the LCC.
Step 2 Using two hands to support and guide the PM, slide it into the power tray (see figure below).
Though a PM can be inserted into any empty PM bay in any power tray, during the initial installation, install
a PM into PM0 in PT0 first. Next, install PMs in ascending order into the remaining PM bays in PT0. Then,
install PMs in ascending order into the remaining power trays.
Note
Step 3 Rotate the ejector lever upwards to seat the PM into the power tray.
Installing Power Components
20
Installing Power Components
Prerequisites