Vertiv MPH2 Installation and maintenance instructions

Vertiv™ MPH2™ Rack PDU
Installer/User Guide

Technical Support Site
If you encounter any installation or operational issues with your product, check the pertinent section of
this manual to see if the issue can be resolved by following outlined procedures. Visit
https://www.VertivCo.com/en-us/support/ for additional assistance.

TABLE OF CONTENTS
1 Important Safety Instructions 1
1.1 Installation Recommendations 2
1.2 Safety Symbols 4
2 Introduction 5
2.1 Metering Levels 5
2.2 Mounting 5
2.3 Locking Receptacles - IEC Type Only 5
2.4 Overcurrent Protection 5
2.5 Integrated Monitoring and Management 5
2.6 General Characteristics 7
2.7 Model Types 8
2.8 Appearance and Components 8
2.8.1 RPC2™ module controls and indicators 8
2.8.2 LED indicators 8
2.8.3 On-board LCD controls and indicators 9
2.8.4 Power components 9
2.8.5 Branch overcurrent protection 10
2.8.6 Hard-wired connection features 11
3 Installation 13
3.1 Attaching Input Power Cords—Hard-wired Models Only 13
3.1.1 Attaching Input-power Cords without Conduit 13
3.1.2 Attaching Input-power Cords with Conduit 14
3.2 Tool-less Mounting 16
3.3 Installing a MPH2™ Rack PDU in a Vertiv™® Rack 16
3.3.1 Mounting Hardware and Tools Required 16
3.3.2 Mounting the Vertical MPH2™ Rack PDU 17
3.3.3 Mounting the Horizontal MPH2™ Rack PDU 17
3.3.4 Mounting a Horizontal MPH2™ Rack PDU onVerticalFrameMemberwithAluminum
Extrusions 18
3.3.5 Rack Grounding strap 19
3.3.6 Recommended Input Branch Circuit Protection 20
3.4 Connecting Rack Equipment 21
3.5 Installing Optional Items 22
3.5.1 RPC Basic Display Module Installation 22
3.5.2 Temperature/Humidity Sensor Installation 24
4 Operation 25
4.1 Controls and Indicators 25
4.2 View Input-level Information 26
4.2.1 Communication Link with RPC2 26
4.3 View MPH2™ Rack PDU System Information 27
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide | 3

4.3.1 System and Screen Options 27
4.3.2 Rebooting 28
4.3.3 Restore System Defaults 29
4.3.4 Determine IP Address, MAC Address and Firmware Version 31
4.3.5 Adjust the Contrast of the On-board LCD 31
4.3.6 Adjust the Orientation of the On-board display 32
4.4 View Active Alarms 32
4.4.1 Silence an Audible Alarm 32
4.5 View Branch-level Information 33
4.6 View Receptacle-level Information 33
4.7 View Sensor Information 35
4.8 Opening and Closing Circuit Breakers 36
Appendices 39
Appendix A: Specifications 39
Appendix B: Troubleshooting 41
Appendix C: Additional Troubleshooting by Plug Type 43
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide | 4

1 IMPORTANT SAFETY INSTRUCTIONS
SAVETHESEINSTRUCTIONS
This safety sheet contains important safety instructions. Read all safety, installation and operating
instructions before installing the Vertiv™ MPH2™ Rack Power Distribution Unit (PDU). Adhere to all
warnings on the unit and in this safety sheet. Follow all instructions.
•The MPH2™ Rack PDU is designed for information technology equipment. The MPH2™ Rack
PDU is not intended for use with life support or other designated critical devices. If uncertain
about its intended application, consult your local dealer or Vertiv™ representative.
•Maximum load must not exceed the rating shown on the MPH2™ Rack PDU nameplate.
•The rated line voltage must not exceed 240 VAC for connection to AC power distribution
systems with an isolated or high-impedance ground.
•Operate the MPH2™ Rack PDU in an indoor environment only in the appropriate ambient
temperature range, as follows:
•32°F to 140°F (0°C to 60°C) for 32A or less input models.
•32°F to 122°F (0°C to 50°C) for 40A and 48A input models without case ventilation.
•32°F to 140°F (0°C to 60°C) for 40A and 48A input models with case ventilation.
•Install the MPH2™ Rack PDU in a clean environment, free of conductive contaminants,
moisture, flammable liquids, combustible gases and corrosive substances.
•The MPH2™ Rack PDU must be installed in a restricted-access location. A restricted-access
location is an area where access is possible only through the use of a tool or lock and key or
other means of security, and is controlled by the authority responsible for the location.
•The MPH2™ Rack PDU has no user-serviceable parts. Under no circumstances attempt to gain
internal access due to the risk of electric shock or burn.
•Refer any unexpected behavior or unusual fault conditions to your local dealer, Vertiv™
representative or Vertiv™ Applications Engineering.
•Vertiv recommends powering only safety agency approved devices from the MPH2 Rack PDU.
•For permanently connected rack PDUs (hard-wired versions), a readily accessible disconnect
device must be incorporated externally to the equipment.
•For rack PDUs with attached input power-supply cords, the socket must be installed near the
equipment and must be easily accessible.
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 1

WARNING! Opening or removing end caps from an MPH2™ Rack PDU may expose personnel to
lethal voltages within the rack PDU. Observe all cautions and warnings. Failure to do so may
result in serious injury or death. MPH2™ Rack PDU units contain no user-serviceable parts. For
service or technical support, contact Vertiv™ Applications Engineering or your local Vertiv™
representative. Do not attempt to service this product yourself.
CAUTION: Connecting an MPH2™ Rack PDU to a power supply with an incorrect rating in
voltage or amperes may damage the connected equipment and your MPH2™ Rack PDU. For
questions about the power supply connections, contact Vertiv™ Applications Engineering or
your local Vertiv™ representative.
CAUTION: Ensure that the ratings of each connected device do not exceed the specified rating
at each branch and receptacle.
CAUTION: All configuration steps must be completed before attempting to start equipment
connected to the MPH2™ Rack PDU.
CAUTION: For power management purposes, record the receptacle where each piece of
equipment is connected. Receptacles on the MPH2™ Rack PDU have a numeric designation.
The MPH2™ Rack PDU identifies the receptacles with numbers that are grouped by branch with
a letter referring to the corresponding circuit breaker.
1.1 Installation Recommendations
•Elevated Operating Ambient Temperature - If installed in a closed or multi-unit rack assembly,
the operating ambient temperature of the rack environment may be greater than room
ambient temperature. Therefore, consideration should be given to installing the equipment in
an environment compatible with the maximum ambient temperature (Tma) specified by the
manufacturer.
•Reduced Air Flow - Installation of the equipment in a rack should be such that the amount of
air flow required for safe operation of the equipment is not compromised.
•Mechanical Loading - Mounting of the equipment in the rack should be such that a hazardous
condition is not created due to uneven mechanical loading.
EUROPEAN UNION
Notice to European Union Customers: Disposal of Old Appliances
This product uses components that are dangerous for the environment, such as electronic cards and
other electronic components. Any component that is removed must be taken to specialized collection and
disposal centers. If this unit must be dismantled, this must be done by a specialized center for collection
and disposal of electric and electronic appliances or other dangerous substances. This product has been
supplied from an environmentally aware manufacturer that complies with the Waste Electrical and
Electronic Equipment (WEEE) Directive 2012/19/EU. The “crossed-out wheelie bin” symbol is placed on
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 2

this product to encourage you to recycle wherever possible.
Please be environmentally responsible and recycle this product through your recycling
facility at its end of life. Do not dispose of this product as unsorted municipal waste. Follow
local municipal waste ordinances for proper disposal provisions to reduce the
environmental impact of waste electrical and electronic equipment (WEEE).
For information regarding the disposal of this equipment, go to http://www.VertivCo.eu.
ROHS Compliance
The MPH2™ Rack PDU modules comply with the Restriction of Hazardous Substances
directive (ROHS), prohibiting use of six hazardous materials manufacturing of electronics, including lead-
free solder.
FCC Compliance
This unit complies with the limits for a Class A device pursuant to Part 15 of the FCC Rules. Operation is
subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired
operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part15, Subpart Bof the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference, in which case
the user will be required to correct the interference at his own expense.
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 3

1.2 Safety Symbols
The following symbols may appear within the documentation or on the product.
SYMBOL MEANING
High Temperature
Alerts the user where the enclosure temperature may exceed 158°F (70°C) while operating under high-ambient temperature and at
maximally rated load.
Instructions
Signifies the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
Dangerous Voltage
Warns about the presence of uninsulated dangerous voltage within the product’s enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
Power On
Indicates the principal On/Off switch is in the On position.
Power Off
Indicates the principal On/Off switch is in the Off position.
Protective Grounding Terminal
Indicates a terminal that must be connected to earth ground before any other connections to the equipment may be made.
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 4

2 INTRODUCTION
The Vertiv™ MPH2™ Rack PDUis an intelligent, high-availability line of managed rack PDUs. It offers
remote monitoring and control capabilities as well as environmental sensors with multiple power input
selections and output configurations.
2.1 Metering Levels
Four types of rack PDUs are available that provide metering and status of important electrical parameters
for input, branch and receptacle levels, as well as integration with environmental sensors. The available
information varies by type of rack PDU. See Model Types on page 8 for descriptions.
2.2 Mounting
Rack PDUs are available for mounting in vertical and horizontal configurations in standard racks or
network enclosures.
Because the power cord is connected at the end of the vertical-mount (0-U) models, the rack PDUs may
be oriented to accommodate top or bottom cable-entry into the rack.
2.3 Locking Receptacles - IEC Type Only
Locking receptacles are available on models with IEC receptacles. The locking feature requires optional
locking power cords to be installed on devices powered by the .rack PDU.
The receptacles require no modification to function properly with non-locking power cords.
2.4 Overcurrent Protection
All rack PDU units with an input current rating greater than 20Afeature 100% rated hydraulic-magnetic
breakers. For all UL-listed models, the maximum cord and plug-connected loading is limited to 80% of the
input current rating, as required by UL and in accordance with the National Electric Code.
Low-profile circuit breakers are used on all 0U rack PDUs with two or three branch circuits. Standard-
profile circuit breakers are used on horizontal models and on certain vertical models that have six branch
circuits or have a 240VAC rating. Each type of circuit breaker is a flush-mount, rocker style (see Manually
Changing a Circuit Breaker State on page 36).
2.5 Integrated Monitoring and Management
The factory-installed Vertiv™ RPC2™ communications module permits managing the Vertiv™ MPH2™
Rack PDU over a secure web page and SNMP (Simple Network Management Protocol)based network
management system. The RPC2 module permits interconnecting up to four rack PDUs in a Rack PDU
Array™ configuration for monitoring and management.
NOTE: Do not interconnect RPC-1000 modules with RPC2 modules in an array. They are incompatible
and will not interoperate.
NOTE: Refer to the RPC2 Communications Module Installation/User Guide, SL-20841, for detailed
instructions on installing and using the RPC2 communication module. The document is available at:
http://www.VertivCo.com.
A rack PDU can be monitored locally through its on-board LCD, through a Web interface or through an
optional display module, the RPC BDM (Part# RPCBDM-1000). The display module connects directly to
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 5

the RPC2 communications module and may be moved between operating rack PDUs. It can be hand-held,
mounted in or on the rack or mounted on a wall near the rack PDU it is monitoring.
Multiple rack PDUs can be managed with these software applications:
•Avocent™ Rack Power Manager software
•Avocent DSView™ management software
•Vertiv™ Trellis™ Real-Time Infrastructure Optimization platform software
•Liebert® Nform® software, which adds group-based receptacle management
•Liebert® SiteScan® software
•Vertiv™ MCT, Mass Configuration and Firmware Update software
Figure 2.1 Vertical Rack PDU Configuration
ITEM DESCRIPTION ITEM DESCRIPTION
1 Vertical rack PDU 6 Serial appliance
2 Connected equipment 7 RPC basic display module (BDM)
3 Case ventilation, both sides (Optional) 8 Monitoring station
4 Rack PDU array 9 Network connection (10MB/100MB/1GB)
5 Sensors—integrated and modular
Table 2.1 Vertical rack PDU Configuraton Descriptions
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 6

Figure 2.2 Horizontal Rack PDU Configuration
ITEM DESCRIPTION ITEM DESCRIPTION
1 Horizontal rack PDU 5 Rack PDU array
2 Connected equipment 6 RPC basic display module (BDM)
3 Network connection (10MB/100MB/1GB) 7 Sensors—integrated and modular
4 Monitoring station 8 Serial appliance
Table 2.2 Horizontal Rack PDU Configuration Descriptions
2.6 General Characteristics
The following are general characteristics of the rack PDU:
•Input ampacities include 16A or 32A for CEMarked versions and 12A to 48A for ULListed
versions.
•Single-phase and three-phase.
•Input voltages include 100-120VAC, 120/208VAC, 200-240/415VAC.
•Receptacle types include NEMA 5-20, IEC 60320 C13 and IEC 60320 C19.
•Input power connection supports a highly flexible fixed power cord or hard-wired connection
to the user accessible terminal block.
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 7

2.7 Model Types
There are four types of Vertiv™ MPH2™ Rack PDU. All models provide power distribution and include
input and branch metering.
•Type B Rack PDU metered: Provides metering of input and branches.
•Type C Rack PDU metered, receptacle-switched: Provides metering of input and branches and
individual power on/off control of each receptacle.
•Type M Receptacle-metered: Provides metering of input, branches and receptacles.
•Type R Receptacle-metered, receptacle-switched: Provides metering of input, branches and
receptacles. Provides individual power on/off control of each receptacle.
2.8 Appearance and Components
2.8.1 RPC2™ module controls and indicators
The Vertiv™ MPH2™ Rack PDU is monitored and managed by the factory-installed RPC2 communications
module. This manual presents information about the functions and features of the rack PDU. For details
on operating the rack PDU through the RPC2 communications module, refer to the RPC2™
Communicatons Module Installer/User Guide (SL-20841). The document is available at Vertiv’s web site:
www.VertivCo.com.
Figure 2.3 Rack PDUMajor Monitoring and Management Features
ITEM DESCRIPTION ITEM DESCRIPTION
1 Serial port 5 Array link/management port
2 USB port 6 Network port
3 Sensor port 7 Access to Reset button
4 Display port
Table 2.3 Rack PDU Major Monitoring and Management Features
2.8.2 LED indicators
The rack PDU has LEDs that indicate receptacle and branch status and system information. The LEDs
flash, pulse or change colors to indicate an event or alarm condition. For details on how LEDs respond to
events and alarms, see Troubleshooting on page 41
NOTE: Receptacles on units with a "B" as the fourth character in the model name (MPHBxxxx) cannot
be turned off and do not have LEDs at their receptacles.
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 8

NOTE: Receptacles on units with an “M” as the fourth character in the model name (MPHMxxxx)
cannot be turned off.
2.8.3 On-board LCD controls and indicators
The rack PDU has an integrated, on-board LCD and touch-key interface that can be used to view
information about the rack PDU. The information available depends on the type of rack PDU. For
additional information about the on-board LCD, see Operation on page 25.
2.8.4 Power components
The number of receptacles and circuit breakers depend on the model of the rack PDU. For example, units
witha“B” as the fourth character in the model name do not have LEDs at their receptacles.
Figure 2.4 Type BRack PDUModel Example
ITEM DESCRIPTION
1 Branch identification
2 Receptacle identification
Table 2.4 Type B Rack PDU Model Example
Descriptions
Figure 2.5 Type RRack PDUModel Example
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 9

ITEM DESCRIPTION
1 Branch identification
2 Receptacle identification
3 Receptacle-status LED
Table 2.5 Type R Rack PDU Model Example
Descriptions
2.8.5 Branch overcurrent protection
Models having greater than 20A input-current rating are equipped with branch overcurrent protection,
utilizing UL489-listed hydraulic-magnetic circuit breakers with a flush-mount, rocker-style actuator. This
protects each receptacle group against overload and short circuits by interrupting the fault current
flowing in the line-to-line, line-to-neutral and line-to-PE conductors of the branch circuits. The branch
circuit breaker ratings apply over the full, rated operating temperature and frequency.
The flush-mount breakers guard against accidental trips that could interrupt power to the connected
load. Manually tripping a breaker requires a small, flat blade, such as a screw driver (seeOpening and
Closing Circuit Breakers on page 36.)
Low-profile circuit breakers are used on all rack PDU with two or three branch circuits less than 240 VAC
rating in a line-neutral configuration. Standard-profile circuit breakers are used on rack PDU with six
branch circuits or having a 240 VAC rating. Each type of circuit breaker is a rocker style as illustrated in
the following figure.
The branch circuit breaker labeling (A through F) shows which receptacles are protected by each
specific breaker. For example, receptacles on Branch A are protected by the circuit breaker labeled A.
Depending upon region and model, PDUs may also have labeling showing the phase associated with each
circuit breaker.
NOTE: The branch circuit breaker is not designed to be used as a disconnect device for the connected
load.
Figure 2.6 Circuit Breaker Branch Identification
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 10

ITEM DESCRIPTION
1 Low-profile circuit breaker actuator
2 Standard-profile circuit breaker actuator
3 Branch identification
Table 2.6 Circuit Breaker Branch Identification
Descriptions
2.8.6 Hard-wired connection features
Arack PDU can be equipped with either a factory-installed input power cord or hard-wired connections.
The hard-wired connection will be at one end of the unit. A terminal block in the hard-wired connection
compartment is coded to aid in making the connections. A collar secures the input wire, providing stain
relief for the terminal block connections. See Disassembly to install an input-power cable on page 14.
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 11

Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 12
This page intentionally left blank.

3 INSTALLATION
An MPH2™ Rack PDU can be installed on the frame members of a rack enclosure using factory-supplied
hardware. The unit can be installed on the face or the side of frame members. The unit can be mounted so
that the power cord exits either the top or bottom of the rack enclosure.
NOTE: Follow all local and national electrical codes, standards and recommended practices.
Disconnect Required for Hard-Wired MPH2™ Rack PDU Units
A readily-accessible input-power disconnect device must be installed near the MPH2™ Rack PDU.
Input Power Location for MPH2™ Rack PDU Units with Factory-Installed Power Cords
The input-power socket must be installed near the MPH2™ Rack PDU and must be easily accessible.
3.1 Attaching Input Power Cords—Hard-wired Models Only
Units with hard-wired input power require attachment of input-power cords. See Hard-wired models—
Recommended Wiring Sizes on page 15 for wire sizing.
Hard-wired models may be wired with or without conduit.
3.1.1 Attaching Input-power Cords without Conduit
WARNING! Always verify circuits are de-energized before working with exposed conductors.
1. Remove the end cap. It is held in place with two T10 Torx screws.
2. Remove the terminal block cover.
3. Loosen the strain-relief collar. It is held in place with two Phillips head PH1 screws.
4. Remove a section of the outer jacket and strip the insulation from the individual wires as
required to fit into the terminal block.
Recommended stripping length for MPH2™ Rack PDU units rated less than 32A is 9mm; for
MPH2™ Rack PDUs rated at 40A or higher, an 11mm strip length is recommended.
5. Slip the power cord through the hole in the end cap and through the strain-relief collar.
6. Loosen the terminal block screws.
7. Insert the wires into the terminal block according to the labeling inside the MPH2™ Rack PDU;
tighten each terminal block screw after inserting a wire. Refer to Terminal tightening torque on
page 16 for tightening torque.
8. Tighten the strain-relief collar around the input power cord. The cord’s outer insulation jacket
should extend through the bracket.
9. Replace the terminal block cover by either sliding it on or snapping it into place.
10. Reattach the end cap to the MPH2™ Rack PDU with the two screws removed in step 1.
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 13

Figure 3.1 Disassembly to install an input-power cable
NUMBER DESCRIPTION NUMBER DESCRIPTION
1 Terminal block cover 4 Terminal-block labels
2 Terminal-block screws 5 Strain-relief collar w/Phillips-head screws
3 Terminal block 6 End cap (attached with 2 screws)
3.1.2 Attaching Input-power Cords with Conduit
1. Remove the end cap. It is held in place with two T10 Torx screws.
2. Remove the terminal block cover.
3. Loosen the strain-relief collar. It is held in place with four nuts (see Disassembly to install an
input-power cable on page 14).
4. Remove a section of the outer jacket and strip the insulation from the individual wires as
required to fit into the terminal block.
Recommended stripping length for MPH2™ Rack PDU units rated less than 32A is 9mm; for
MPH2™ Rack PDUs rated at 40A or higher, a strip length of 11mm is recommended.
5. Slip the stripped wire through the conduit connector, through the metal end plate, through
the locknut and into the terminal block cavity.
6. Loosen the terminal block screws.
7. Insert the wires into the terminal block according to the labeling inside the MPH2™ Rack PDU;
tighten each terminal block screw after inserting a wire. Refer to Terminal tightening torque on
page 16 for tightening torque.
8. Install the terminal block cover, by either sliding it on or snapping it into place and sliding it
firmly against the main body of the MPH2™ Rack PDU.
9. Attach the metal end plate to the MPH2™ Rack PDU with four screws provided in the kit.
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 14

10. Slide the conduit into the conduit connector.
11. Tighten the conduit connector until it grips the conduit and crimps it securely. See the
conduit connector manufacturer's installation instructions for recommended locknut
tightening torque values.
Figure 3.2 Re-assembly to install an input power cable in conduit
Figure 3.3
NUMBER DESCRIPTION NUMBER DESCRIPTION
1 Terminal block cover 5 Terminal block labels
2 Filler cover 6 Metal end plate (attached with 4 screws)
3 Terminal block screws 7 Conduit connector (field-supplied) and locknut
4 Terminal block 8 Conduit (cable not shown)
UNITS
MPH2™ RACK PDU INPUT CURRENT RATING
≤32A >32A
Metric 4mm² 10mm²
Imperial (USStandard) 10 AWG 6 AWG
Table 3.1
Hard-wired models—Recommended Wiring Sizes
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 15

TIGHTENING
TORQUE
MPH2™ RACK PDU INPUT CURRENT
RATING
≤32A >32A
Minimum 0.6 Nm (5.3lb-in.) 1.5Nm(13.3lb-in.)
Maximum 0.8Nm(7.1lb-in.) 1.8Nm (15.9lb-in.)
Table 3.2
Terminal tightening torque
3.2 Tool-less Mounting
For tool-less mounting, attach the mounts to the rear of the MPH2™ Rack PDU, then hang it in the rack as
shown in the following figure. Tighten the screw attaching the mounting button to 17.7 lb-in. (2Nm).
NOTE: Tool-less mounting brackets are not supplied. A range of brackets for Vertiv™ and other
manufacturers’ racks are available as accessories.
Figure 3.4 Tool-less mounting
NUMBER DESCRIPTION
1 Torx screw
2 Button mount
3 Insert button mount into keyhole slot.
3.3 Installing a MPH2™ Rack PDU in a Vertiv™®Rack
3.3.1 Mounting Hardware and Tools Required
Factory-supplied
•2 mounting brackets
•2 mounting buttons
•4 spring nuts
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide 16