3 Installing and Removing AC and DC Input

3 Installing and Removing AC and DC Input
CH A P T E R
3
Installing and Removing AC and DC Input
Power Supply and Fan Modules
This chapter provides the installation and removal instructions for the AC and DC input power supply
and fan modules for the Cisco ME 3800X and ME 3600X switches. Your switch ships with at least one
power supply module installed, either AC or DC, depending on your order. The power supply and fan
modules are field-replaceable units (FRUs).
Note
The power supply and fan modules are hot-swappable devices.
For translations of the safety warnings in this chapter, see the Regulatory Compliance and Safety
Information for the Cisco ME 3800X and ME 3600X Switch on Cisco.com.
•
Power Supply Module Description, page 3-1
•
Fan Module Description, page 3-3
•
Connector-Side Description, page 3-3
•
Power Supply and Fan Module Installation, page 3-4
Power Supply Module Description
Table 3-1
Power Supply Module Model Numbers and Descriptions
Model number
Description
PWR-ME3KX-AC
AC input power supply module
PWR-ME3KX-DC
DC input power supply module
The AC input power supply module is an autoranging unit that supports input voltages between
100 and 240 VAC. The AC power supply module ships with a power cord to connect to an AC power
outlet.
The DC input power supply module has a single input feed and supports input voltages from 18 to
32 VDC or 36 to 72 VDC. The DC power supply module ships with a terminal block to be wired for DC
power outlet connections. The terminal block is covered by a clear plastic block cover that snaps onto
the terminal block. You must remove the block cover before you work with the wires. The block cover
is slotted so that the wires can exit only one end. If you want the wires to exit in a different direction,
remove the block cover, rotate it, and snap it back on.
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Power Supply Module Description
Each power supply module is cooled by three internal fans. A fan failure triggers an alarm. When a fan
fails, replace the power supply module immediately.
Caution
Both slots must be occupied either by two power supply modules or a power supply and a fan module.
Do not run the switch with an empty slot unless you are replacing a faulty power supply or fan module.
Running the switch with an empty slot triggers an alarm.
Figure 3-1
AC Input Power Supply Module Handle Side
1
2
PSU OK
207446
AC
3
4
5
6
1
AC input power supply module
4
Extraction handle
2
Power supply module LED
5
Power switch
3
Power input LED
6
AC power connector
Figure 3-2
DC Input Power Supply Module Handle Side
1
2
PSU OK
207447
AC
3
4
5
6
1
DC input power supply module
4
Extraction handle
2
Power supply module LED
5
DC input power terminal block
3
Power input LED
6
Power switch
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Fan Module Description
Fan Module Description
Table 3-2
Fan Module Model Number and Description
Model number
Description
ME-FANTRAY
Fan module
The fan module provides cooling and proper airflow when only one power supply module is installed.
Caution
Both slots must be occupied either by two power supply modules or a power supply and a fan module.
Do not run the switch with an empty slot unless you are replacing a faulty power supply or fan module.
Running the switch with an empty slot triggers an alarm.
Each fan module contains three fans. The switch can operate safely if one fan fails. A fan failure triggers
an alarm. When a fan fails, replace the fan module immediately.
Figure 3-3
Fan Module Handle Side
1
2
207448
FAN
3
1
Fan module
2
Fan module status LED
3
Extraction handle
Connector-Side Description
Figure 3-4 shows the connector side of the power supply and fan module, which connects to the switch
rear panel through its power supply module slot.
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Power Supply and Fan Module Installation
Figure 3-4
Power Supply and Fan Module Connector Side
1
1
207449
1
2
1
Fans
2
Connector pins
Power Supply and Fan Module Installation
•
Equipment That You Supply, page 3-4
•
Installation Guidelines, page 3-4
•
Installing an AC Power Supply Module, page 3-5
•
Installing a DC Power Supply Module, page 3-7
•
Installing a Fan Module, page 3-13
Equipment That You Supply
You need a ratcheting screwdriver with a Phillips head that exerts up to 15 inch-pounds (in-lb) of torque.
Installation Guidelines
Observe these guidelines when you install a fan or power supply module:
•
Do not force the fan or power supply module into the slot. This can damage the pins on the switch
if they are not aligned with the unit.
•
A fan or power supply module that is only partially connected to the switch can disrupt the system
operation.
•
Verify that you are using the correct power cord.
Warning
Do not reach into a vacant slot or chassis while you install or remove a module or a fan. Exposed
circuitry could constitute an energy hazard. Statement 206
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
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Power Supply and Fan Module Installation
Warning
Caution
Do not work on the system or connect or disconnect cables during periods of lightning activity.
Statement 1001
To prevent overheating and to maintain proper air flow, either a power supply module or a fan module
must be installed in each power supply module slot at all times. Never operate the switch for extended
periods of time without either a power supply module or a fan module installed in each power supply
module slot.
Installing an AC Power Supply Module
This procedure is for installing an AC power supply module in the PSU 1 power supply module slot.
Repeat these steps to install a power supply module in the PSU 2 power supply module slot.
Each AC power input is dedicated to one power supply module (PSU 1 or PSU 2). One AC power input
does not power on both power supply modules at the same time (see Figure 3-5).
AC Power Supply Diagram
AC-1
PSU-1
AC-2
PSU-2
280937
Figure 3-5
To install an AC input power supply module, follow these steps:
Step 1
Verify that the power from the power source is off.
Step 2
Insert the new power supply module in the power supply module slot, and gently push it into the slot
(see Figure 3-6). When correctly inserted, the power supply module is flush with the switch rear panel.
Figure 3-6
Inserting an AC Power Supply Module in a Switch
207478
PSU OK
AC
Step 3
Align the two captive screws with the screw holes in the panel. Use a ratcheting torque screwdriver to
torque each screw to 10 in-lb.
Step 4
Connect the AC power cord to the power supply module and to an AC power outlet.
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Power Supply and Fan Module Installation
Step 5
(Optional) Attach the power-cord retainer clip to the power supply module and thread the plastic bushing
until it is snug against the plug (Figure 3-7).
AC Power Supply Module and Power-Cord Retainer in a Switch
278366
Figure 3-7
Step 6
Turn on the power at the power source and set the power supply module switch to ON.
Step 7
From the front of the switch, confirm that the PS IN and the PS/FAN LEDs are green. If you can access
the switch rear panel, verify that the PSU and INPUT LEDs are green. See the “Power Supply Module
LEDs” section on page 1-11 for a description of the power supply module LEDs. See the “Switch LED
Panels” section on page 1-7 for system LED descriptions.
Removing AC Power Supply Modules
Step 1
Turn off the power at its source, and set the power supply module switch to OFF.
Step 2
Detach the power-cord retainer and the plastic bushing from the power cord.
Step 3
Remove the power cord from the power connector.
Step 4
Use a Phillips screwdriver to loosen the two captive screws that secure the power supply module to the
chassis.
Caution
Do not leave the power supply slot open for more than:
- 5 minutes provided the ambient temperature is 25°C and at 5000 feet or lower elevation
- 90 seconds in all other conditions.
Caution
Wait 5 minutes prior to reopening a power supply slot.
Step 5
Remove the power supply module from the power slot by pulling on the extraction handle.
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Power Supply and Fan Module Installation
Installing a DC Power Supply Module
This procedure is for installing an DC power supply module into the PSU 1 power supply module slot.
Repeat these steps to install a power supply module in the PSU 2 power supply slot.
To connect the switch to a DC input power source, follow these steps:
1.
Preparing for Installation, page 3-7
2.
Grounding the Switch, page 3-8
3.
Installing the DC Power Supply Module in the Switch, page 3-10
4.
Wiring the DC Input Power Source, page 3-10
Warning
An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure
that no exposed portion of the DC-input power source wire extends from the terminal block plug.
Statement 122
Warning
Before connecting or disconnecting ground or power wires to the chassis, ensure that power is
removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel
board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch
handle of the circuit breaker in the OFF position. Use a voltmeter to test for 0 (zero) voltage at the
power terminals on the chassis. Statement 196
Caution
Installation of the equipment must comply with local and national electrical codes.
Note
We recommend that you use 14 or 16 AWG copper wiring for Network Equipment Building Systems
(NEBS) installation, following the guidelines for DC power wiring in the central office.
Note
You can use the grounding lug to attach a wrist strap for ESD protection during servicing.
Preparing for Installation
You need these tools and equipment:
•
Ratcheting torque Phillips-head screwdriver that exerts up to 36 inch-pounds (in-lb).
•
Crimping tool
•
Wire-stripping tools.
•
Copper ground wire (6 AWG, insulated or noninsulated) for the ground connection.
•
Two leads of 14 or 16 AWG copper wire.
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Power Supply and Fan Module Installation
Grounding the Switch
Follow the grounding procedure instructions and observe these warnings:
Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024
Warning
When installing or replacing the unit, the ground connection must always be made first and
disconnected last. Statement 1046
Caution
To make sure that the equipment is reliably connected to earth ground, follow the grounding
procedure instructions, and use a UL-listed lug suitable for number-6 AWG wire and two number-10-32
ground-lug screws.
Follow these steps to install a dual-ground lug on the switch. Make sure to follow any grounding
requirements at your site.
Step 1
Locate the dual-hole lug that ships with the switch.
Step 2
If your ground wire is insulated, use a wire stripping tool to strip the 6 AWG ground wire to 0.875 inch
(12.7 mm) ± 0.02 inch (0.5 mm).
Figure 3-8
Stripping the Ground Wire
2
254820
1
3
1
0.875 inch (12.7 mm) ± 0.02 inch (0.5 mm)
2
Insulation
3
Wire lead
Step 3
Slide the open end of the ground lug over the exposed area of the wire.
Step 4
Crimp the ground lug to the wire (see Figure 3-9).
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Power Supply and Fan Module Installation
Crimping the Ground Lug
280938
Figure 3-9
Step 5
Attach the dual-hole lug and the wire assembly to the chassis ground connection with the supplied
screws (Figure 3-10).
Attaching the Ground Lug and Wire Assembly
207475
Figure 3-10
1
1
Dual-hole ground lug
Step 6
Use a ratcheting torque Phillips-head screwdriver to torque the ground-lug screws to 32 in-lb.
Step 7
Connect the other end of the grounding wire to an appropriate grounding point at your site or to the rack.
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Power Supply and Fan Module Installation
Installing the DC Power Supply Module in the Switch
Step 1
To ensure that power is removed from the DC circuits, locate the circuit breakers for the DC circuits,
switch the circuit breakers to the OFF position, and tape the circuit-breaker switches in the OFF position.
Step 2
Insert the new power supply module into the power supply module slot, and gently push it into the slot
(Figure 3-11). When correctly inserted, the power supply module is flush with the switch rear panel.
Figure 3-11
Inserting a DC Power Supply Module
PSU OK
AC
207479
PSU OK
AC
Step 3
Align the two captive screws with the screw holes. Use a ratcheting torque Phillips-head screwdriver to
torque each screw to 10 in-lb.
Step 4
Connect the input power as described in the “Wiring the DC Input Power Source” section.
Wiring the DC Input Power Source
Before you wire the DC input power source, review these warnings and the information:
Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than:
24VDC – 30A
48VDC – 15A Statement 1005
Warning
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.
Statement 1022
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030
Caution
The DC power supply module voltage should be within 18 to 32 VDC or 36 to 72 VDC. If the supply
voltage is not in this range, the switch might not operate properly or might be damaged.
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Power Supply and Fan Module Installation
Step 1
To ensure that all power is OFF, locate the circuit breaker that services the DC circuit, switch the circuit
breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position.
Step 2
Remove the terminal block cover.
Note
Step 3
The terminal block is covered by a clear plastic block cover that snaps onto the terminal block.
You must remove the block cover before you work with the wires. The block cover is slotted so
that the wires can exit only one end. If you want the wires to exit in a different direction, remove
the block cover, rotate it, and snap it back on.
Using a wire-stripping tool, strip each of the wires coming from the DC input power source to 0.350 inch
(8.9 mm) ± 0.02 inch (0.5 mm).
Figure 3-12
Stripping the DC Input Power Source Wire
2
254820
1
3
1
0.350 inch (8.9 mm) ± 0.02 inch (0.5 mm)
2
Insulation
3
Wire lead
Step 4
Crimp the fork-type terminals to the 14 or 16 AWG DC power input wires.
Step 5
Connect the wires to the DC input power terminals as shown in Figure 3-13. Make sure to match the
polarity (negative to negative, positive to positive) when connecting the wires to the terminal.
Figure 3-13
2
207935
1
Connecting the DC Input Power Terminals to the Terminal Blocks
1
Step 6
Caution
Negative
2 Positive
Use a ratcheting torque Phillips-head screwdriver to torque the terminal-block screw to 14 in-lb.
Do not overtorque the terminal-block screws. The recommended maximum torque is 14 in-lb.
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Power Supply and Fan Module Installation
Caution
Secure the wires coming from the terminal block so that they cannot be disturbed. For example, use tie
wraps to secure the wires to the rack.
Step 7
After ensuring that all wire connections are secure, reinstall the terminal block cover.
Step 8
Remove the tape from the circuit-breaker switch handle, and move the circuit-breaker handle to ON.
Step 9
Move the DC power supply module switch to ON.
Step 10
From the front of the switch, confirm that the PS IN and the PS/FAN LEDs are green. If you can access
the switch rear panel, verify that the power supply module PSU and INPUT LEDs are green. See the
“Power Supply Module LEDs” section on page 1-11 for a description of the power supply module LEDs.
See the “Switch LED Panels” section on page 1-7 for system LED descriptions
Removing the DC Power Supply Module
Step 1
Move the DC power supply module switch to OFF.
Step 2
Turn off power at the DC circuits. To ensure that power is removed from the DC circuits, locate the
circuit breakers for the DC circuits, switch the circuit breakers to OFF, and tape the circuit-breaker
switches.
Step 3
Remove the terminal block cover from the power supply module terminal blocks.
Step 4
Use a Phillips screwdriver to remove the DC input power wires from the power terminals.
Step 5
Use a Phillips screwdriver to loosen the two captive screws that secure the power supply module to the
switch chassis.
Step 6
Remove the power supply module from the power slot by pulling on the extraction handle.
Caution
To prevent overheating and to maintain proper air flow, either a power supply module or a fan module
must be installed in each power supply module slot at all times.
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Power Supply and Fan Module Installation
Installing a Fan Module
Step 1
Insert the new fan module in the power supply module slot, and gently push it into the slot (Figure 3-14).
When correctly inserted, the fan module is flush with the switch rear panel.
Inserting a Fan Module in a Switch
207480
Figure 3-14
Step 2
Align the two captive screws with the screw holes in the panel. Use a ratcheting torque screwdriver to
torque each screw to 10 in-lb.
Step 3
From the front of the switch, confirm that the PS/FAN LED is green. If you can access the switch rear
panel, verify that the FAN LED is green. See the “Fan Module LED” section on page 1-13 for a
description of the fan module LED. See the “Switch LED Panels” section on page 1-7 for system LED
descriptions.
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Power Supply and Fan Module Installation
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