Liebert MPX User Manual

Liebert® MPX™ Rack Power
Distribution Unit

User Manual - Global Applications

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. For additional assistance,
visit https://www.VertivCo.com/en-us/support/.

TABLE OF CONTENTS

Important Safety Instructions 1

1 Introduction 3

1.1 MPX™ PRC: Power and Communication Bus 4

1.1.1 Mounting features 6

1.2 MPX™ PEM: Power Input 6

1.2.1 Connecting the MPX™ IPC for variable capacity models 8

1.3 MPX™ BRM: Power Output 9

1.4 RPC-1000™ and RPC2™ Communications Modules 11

1.4.1 RPC-1000 Communications Module 11

1.4.2 RPC2™ Communications Module 12

1.4.3 Accessing information on the RPC BDM 13

2 Installation and Assembly 15

2.1 Installing the MPX™PRC in a Rack 15

2.1.1 Preparing the Liebert MPX rack PDUfor mounting 15

2.1.2 Attaching brackets 16

2.2 System Assembly 18

2.2.1 Installing an MPX™ PEM onto the MPX™ PRC 18

2.2.2 Installing an MPX IPC to a variable capacity MPX PEM 22

2.2.3 Installing an MPX™BRMto an MPX™PRC 23

2.2.4 Installing a communications module 26

2.2.5 Installing optional temperature and humidity sensors 27

2.2.6 Installing an optional RPC™ BDM 27

3 System Functional Test 31

3.1 Assembly Checklist 31

3.2 Functionality Test 31

4 Operating and Configuring Rack PDUCards 33

4.1 Configuring Rack PDUCards 33

4.1.1 Configuring the RPC2 communications module 33

4.1.2 Configuring the RPC-1000™ communications web card 34

4.1.3 Indicators 35

4.2 Operating Rack PDUCards 36

4.2.1 Connecting to the rack PDUcards 36

4.3 Operation without Rack PDUCards 36

5 Maintenance 37

5.1 No User-Serviceable Parts 37

6 Troubleshooting 39

6.1 Liebert MPX Rack PDU 39

6.1.1 MPX™ PEM indicators and LEDs 39

6.1.2 MPX BRM indicators and LEDs 40

6.2 RPC-1000™ Communications Web Card Basic Troubleshooting 42

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/U ser Guide | i

6.2.1 Basic troubleshooting 42

6.2.2 Array configurations 43

6.2.3 Restarting or resetting 43

Appendices 45

Appendix A: Agency Approvals 45

Appendix B: Dimensional Drawings 47

Appendix C: Recycling, Compliance and Modifications Information 49

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/U ser Guide | ii

IMPORTANT SAFETY INSTRUCTIONS

The following components are covered in this safety section:

• Liebert® MPX™ Power Rail Chassis (PRC)

• Liebert® MPX™ Power Entry Module (PEM)

• Liebert® MPX™ Branch Receptacle Module (BRM)

• Liebert® MPX™ Input Power Cord (IPC)

• Liebert® RPC-1000™ Communications Module

• Liebert® RPC2™Communications Module

Saving These Instructions

WARNING!
The MPX rack PDUcontains hazardous voltage that creates a risk of arc flash and electric
shock resulting in equipment damage, injury or death. Follow the warnings and cautions in this
document to avoid serious injury or death from electric shock.

Read this manual

This manual contains important safety instructions. Read all safety, installation and operating instructions
before installing a Liebert® MPX™ rack PDU. Adhere to all cautions and warnings on the unit and in this
manual. Upon installation, follow all operating and user instructions.

Installation location

Install the Liebert MPX rack PDUin a restricted-access location controlled and monitored by a responsible
authority where access is only possible through the use of a tool, lock and key or other means of security.

Operate the Liebert MPX rack PDUonly in an indoor environment within an ambient temperature range
of 32°F to 140°F (0°C to 60°C) with a relative humidity of 5% to 95%, non-condensing. Install it in a clean
environment, free of conductive contaminants, moisture, flammable liquids, gases and corrosive
substances.

Qualified personnel

Vertiv strongly recommends that the MPX PEM be installed only by an individual who has been properly
trained and qualified to perform electrical work.

Only allow personnel who understand the precautions in this manual into the Liebert MPX rack PDU’s
restricted access location.

Safety-critical applications

Do not use the Liebert MPX rack PDU for safety-critical situations. It is designed to deliver power to
information technology and telecommunication equipment, and is not intended for use with life support
or other critical devices. If you are uncertain about its application, consult your local dealer or your Vertiv
representative.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/U ser Guide | 1

MPXPEMinstallation

WARNING! The connectors on the bottom of the MPXPEMare energized with hazardous
voltage when it is connected to power.

WARNING! Connect input power only after the MPX PEM is properly installed on the MPX PRC
and the MPX IPC is properly connected to the MPX PEM.

WARNING! The MPXPEM is not hot swappable. Never remove an MPXPEM from the power
distribution unit while input power is connected. Disconnect power before unlocking the
connector screws that attach the MPXPEM to the MPXPRC.

WARNING! Connect only one MPX PEM to an MPX PRC. Failure to comply can result in serious
injury or equipment damage.

Module cover removal and foreign objects

With exception of the communications module cover on the MPX PEM module, never open or remove the
cover of any Liebert® MPX™ rack PDU.

Never insert a foreign object into an MPX module, particularly into the MPXPRC, with the exception of the
RPC-1000™ and RPC2™ communications modules. Each module has a small hole between the display and
sensor RJ45 connectors to reset the card.

MPXmodule service

Do not attempt to service the Liebert MPX rack PDUs. The modules do not contain user-serviceable parts.
If you need support or have questions about your Liebert MPX rack PDU, contact Vertiv™ Technical
Support or your local Vertiv representative.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/U ser Guide | 2

1 INTRODUCTION

The Liebert® MPX™ is an adaptive rack power distribution unit (PDU) built with modular and scalable
components that can be installed and reconfigured on-site to meet varying input and output power
connectivity needs. For optimal flexibility, ensure that the modules match the power requirements of the
application. Failure to do so could result in damage to the Liebert MPX rack PDUand connected
components. The Liebert MPX adaptive rack PDU family consists of the following components:

• MPX™ Power Rail Chassis (PRC) - distributes intermodule power and communications and
serves as the mounting base for all Liebert MPX rack PDUcomponents.

• MPX™ Power Entry Module (PEM) - delivers power to the Liebert MPX rack PDUand includes
provisions for remote and local communication options. Detachable and non-detachable cord
models are available.

• MPX™ Input Power Cord (IPC) - a detachable input power cord required for some models of
MPX PEM. A variety of single- and three-phase plug types are available.

• MPX™ Branch Receptacle Module (BRM) - distributes overload-protected output power to user
loads. The hot swappable design allows for field reconfiguration with a choice of receptacle
type, quantities and monitoring/control performance.

• RPC-1000™ and RPC2™ communications modules - optional network interface cards that
provide network connectivity, monitoring and control capabilities to rack PDUs from a single
network connection and serve as a rack accessory integration point. The communications
modules can be installed in the MPXPEMcommunications card slot.

NOTE: The RPC-1000 and RPC2 communications modules cannot be used together in an array
configuration.

NOTE: Effective December 1, 2016, Vertiv ended distribution of the RPC-1000 communications module.
If you purchased an RPC-1000 communications module and the extended warranty on or before
December 1, 2016, the last effective day of the extended warranty is December 1, 2021, or before,
respective to your purchase date. After this date, Vertiv no longer supports the RPC-1000
communications module.

The Liebert MPXrack PDUalso comes with an optional display module:

• RPC Basic Display Module (RPC BDM) - optional display for local monitoring of Liebert MPX
rack PDUs. It is equipped with a supplied Ethernet cable. However, if the mounting location is
not within reach of the supplied cable, a longer field-supplied cable may be used.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/U ser Guide | 3

Figure 1.1 Liebert® MPX™ Rack PDUAssembly Diagram

Table 1.1 MPX Assemblies

ITEM DESCRIPTION

1 MPX PRC

2 MPX PEM

3 Rack PDU Card communications module (RPC2)

4 MPX BRM (threeshown connected)

1.1 MPX™ PRC: Power and Communication Bus

The MPX™ PRC is the fundamental building block of the Liebert MPX rack PDU. Power and
Communications buses are integrated into the length of the MPX PRC. The MPX™ BRM and MPXPEM
lock onto the MPX PRC to facilitate power input and output, monitoring and management, depending on
the type of module.

The MPX PRC is available in different lengths to accommodate a single MPXP PEM and up to seven MPX
BRMs. The MPX PRC has five power bus channels that allow you to connect the MPX PEM and MPX BRM
modules to up to three phases of line, neutral and protective earth. The communication bus allows the
Liebert RPC, MPX PEM and MPX BRM modules to communicate with each other.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/U ser Guide | 4

The MPX PRC has a module connector T-slot for securely attaching the MPX PEM and MPX BRM modules
via two latching screws. Spacer covers are available to reserve unused sections of the MPX PRC’s surface
for future expansion.

WARNING!
Connecting multiple MPX PEMs to one MPX PRC can cause equipment damage, injury or
death. Connect only one MPX PEM to an MPX PRC. Connecting more than one MPX PEM
could cause cross-conduction. Cross-conduction can cause upstream overcurrent protective
devices (OCPD) to trip or the resulting short circuit current to exceed the OCPD Ampere
Interrupting Capacity (A.I.C.) ratings.

Items 1 and 2 in the following figure show the top and side view of the MPX PRCto illustrate how to
properly seat the component on the MPX rack PDU.

Figure 1.2 MPX PRC Components

Table 1.2 MPX PRC Components

ITEM DESCRIPTION

1 MPXPRCtop view

2 MPXPRCside view

3 MPXPRCend cap

4 Communication bus

5 Module connector slot

6 Power bus

7 Rail connector T-slots to accommodate spring nuts for mounting

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 5

1.1.1 Mounting features

The back of the MPX™ PRC features T-slots running the length of the unit. These can be used for
mounting the assembled units in racks.

1.2 MPX™ PEM: Power Input

WARNING! The MPX rack PDUcontains hazardous voltage that creates a risk of arc flash and
electric shock resulting in equipment damage, injury or death. The power conductors on the
bottom of the MPX PEM are energized with hazardous voltage whenever the MPX PEM is
connected to power.

WARNING! This unit must be properly and securely installed on the MPX PRC before power is
applied. If the MPX PEM is not installed on the MPX PRC, live conductors will be exposed.

WARNING! Vertiv strongly recommends that the MPX PEM be installed only by an individual
who has been properly trained and qualified to perform electrical work.

WARNING! Connecting two MPX PEMs to one MPX PRC can cause equipment damage, injury
or death. Only connect one MPX PEM to an MPX PRC. Connecting more than one MPX PEM
can cause cross-conduction. A cross-conduction willresult in an upstream OCPD trip, and may
result in a short circuit current that exceeds the OCPD A.I.C. ratings.

The MPX PEM securely fastens to the MPX PRC to deliver polyphase power from the power supply cord to
the power bus. You can install the Liebert® RPC2™ communications module in the MPX PEM to monitor
and configure the communication bus.

The North American MPX PEM models are available with variable-capacity or fixed-capacity. The
European models are available with fixed-capacity only. The power supply cords for both configurations
are available in a variety of single- and three-phase NEMA, Schuko and IEC plug styles and ratings.

You must connect a detachable MPX™IPCto the power inlet on the variable-capacity models. (See

Connecting the MPX™ IPC for variable capacity models on page 8.) The power input ratings are

determined by the plug type. An MPX IPC can be exchanged for an MPX IPC with a different plug type
and rating (single phase, three-phase or ampacity) to adapt it for a different power service configuration.

NOTE: For fixed capacity, the North American models support up to 60 A (48 A) per phase and the
European models support up to 63 A per phase. For variable capacity, the North American models
support up to 30 A (24 A) per phase and the European models support up to 32 A per phase.

All models, except the elementary model, provide power metering of the polyphase inputs, including
individual line voltages and currents, total kilowatts (kW) and total kilowatt hours (kW-h). Additionally,
individual line current alarm and operation status are supported. Elementary models of the MPX PEM are
available only in Europe and are not equipped with power metering capability.

Other important features include:

• Input phase LEDs to indicate the operational status of each phase of input power.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 6

• Audible alarms that indicate an overcurrent condition. You can test or silence the audible
alarm by pressing the A la r m Silen ce/T e s t button. The audible alarm can be tested by
momentarily pressing the button when an alarm condition is not pending or active.

• The Silence/Test button is also used during troubleshooting to confirm the communications
module is communicating with each MPX™BRM (see Restarting or resetting on page 43).

You can reestablish communication with all the modules and reset the MPX™PEM by pressing
and holding the alarm silence button for more than 5 seconds when no active alarm condition
is present. During an MPXPEM reset, the unit's input phase LEDs become dark. The MPXPEM
reset function takes approximately 30 seconds. When complete, each MPXBRM displays a
numeric value within its Branch Numeric Indicator display window. The MPXPEM reset
function does not interrupt critical power to the MPXPEM or any of the MPXBRM modules.

Item 1 and 2 in the following figure shows the variable-capacityMPXPEMand the fixed-capacity
MPXPEM. The variable-capacity MPXPEMhas quick-connect couplings for a power input cable, while the
fixed-capacity model is equipped with a hard-wired power input cable.

Figure 1.3 MPX PEM Features

Table 1.3 MPX PEM Features

ITEM DESCRIPTION

1 Variable-capacity MPXPEM

2 Fixed-capacity MPXPEM

3 RPC2 communications module

4 Latch screws

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 7

ITEM DESCRIPTION

5 Input phase power indicators

6 Alarm Silence/Test button

7 Quick-connect couplings for power input cable (variable-capacity models)

8 Hard-wired power input cable (fixed-capacity models)

Network port used for:

9

10

11 Display port used to plug in the optional RPC BDM

12 Port for optional Liebert® SN sensor accessories

13 Command Line Interface (CLI) Serialconsole port

• Plugging in the Local Area Network (LAN) via an Ethernet cable (not included)

• Creating a rack PDU array by interconneting additional rack PDUs

Link port used for:

• Local configuration throughinterconnection to a computer

• Creating a rack PDU array by interconnecting additionalrack PDUs

1.2.1 Connecting the MPX™ IPC for variable capacity models

The MPX IPC is a detachable input power cord that permits changing the input power configuration of
variable capacity models of the MPX™ PEM. These changes must be made during planned outages. For
detailed installation steps, see the Liebert® MPX™ PEM Quick Installation Guide (SL-20821 Rev6/590­1624-501A).

The MPX IPC is offered only for North American (UL-listed) models. A variety of single- and three-phase
NEMA and IEC plug types are also available. The MPX IPC is not compatible with the fixed-capacity
MPXPEM.

WARNING! Do not connect the MPX IPC to input power until the MPX PEM is attached to the
MPX PRC and the MPX IPC is attached to the MPX PEM. If the MPX PEM is not connected to
the MPX PRC, conductors with live hazardous voltage are exposed when power is connected.

Exposed conductors with hazardous voltage can create a risk of arc flash and electric shock
which can result in equipment damage, injury or death.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 8

Figure 1.4 MPX IPC Clamp

Table 1.4 MPX IPC Clamp

ITEM DESCRIPTION

1 MPXIPC retention clamp to prevent accidental disconnection (included with MPXIPC assembly)

2 Quick connect power coupling

3 Integrated snap locks

1.3 MPX™ BRM: Power Output

The MPX BRM provides output power distribution to user load equipment. MPX BRMs are available with a
variety of combinations of output receptacles such as NEMA, IEC, Schuko and other regional types that
are overcurrent-protected by 100% rated hydraulic-magnetic circuit breakers.

MPX BRMs are hot-swappable to allow installation without powering down the Liebert MPX rack PDU. All
MPX BRMs include an alphanumeric LED that uniquely identifies the individual module. Each MPXBRM's
unique identification is assigned by the RPC2 communications module.

North American and European MPXBRMunits are available in the following models:

• Elementary - provides power distribution only; power metering and alarming are not supported.

• Branch Monitoring - provides power distribution and branch power metering, including
voltage, current, Watt and VA power, energy and power factor.

• Receptacle Management - provides the same features as the branch monitoring models, plus
power metering, including crest factor, on/off control, current alarming and operational status
of individual receptacles. The receptacles can be turned on or off remotely and programmed
for automatic power-on sequencing.

MPXBRMfeatures include:

• An alphanumeric LED to identify the module.

• The alphanumeric LED display on the branch monitoring and receptacle management models
shows operational status of the branch current condition.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 9

• A magnetic hydraulic circuit breaker. If necessary, the circuit breaker can be manually opened
by inserting a flat-blade screwdriver into the integrated reset slot. Open circuit breaker
detection causes the alphanumeric LED to flash on the Branch Monitoring and Receptacle
Management models.

• Color-coded labeling to clearly identify the output-phasing configuration (L1-L2, L2-L3, L3-L1,
L1-N, L2-N or L3-N) of the MPX™BRM receptacles. Voltage phasing is determined by the
power blade configuration on the bottom of each MPX BRM. The voltage phasing, for example,
"L12", flashes three times on the alphanumeric LED display when the module is first attached.

• IEC C13 receptacle types support attachment of optional retaining clips to provide strain relief
for the load's power supply cord.

The Branch Monitoring models provide current alarming and operational status of the branch. The unit
displays an “o” for an overcurrent condition and a “u” for an undercurrent condition. The Receptacle
Management models include additional LEDs for each receptacle to alert you of the operational status of
the receptacle (on or off).

Figure 1.5 MPX BRM

Table 1.5 MPX BRM

ITEM DESCRIPTION

1 Latch screws

2 LEDbranch numeric indicator

3 Color-codedreceptacle phase label

4 Receptacle on/off indicators (Receptacle Management units only)

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 10

ITEM DESCRIPTION

5 Receptacles

6 Branch-rated circuit breaker (100% rated)

1.4 RPC-1000™ and RPC2™ Communications Modules

NOTE: Effective December 1, 2016, Vertiv ended distribution of the RPC-1000 communications module.
If you purchased an RPC-1000 communications module and the extended warranty on or before
December 1, 2016, the last effective day of the extended warranty is December 1, 2021, or before,
respective to your purchase date. After this date, Vertiv no longer supports the RPC-1000
communications module.

The Liebert MPX rack PDU can be centrally managed, locally and remotely, via either the RPC-1000 or
RPC2 communications modules. Refer to the following documents for more information:

• Liebert® RPC™ Web Card User Manual (SL-20825)

• Liebert® RPC2™ Communications Module Installer/User Guide (590-1380-501A)

You can control the Liebert® MPX™rack PDUand attached devices through the communication module's
web interface. For systems connected to an Ethernet network, the web interface uses Simple Network
Management Protocol (SNMP). The communications module also serves as the connection point for
multiple support capabilities and devices including:

• RPC Basic Display Module (RPC BDM)

• Various optional environmental sensors

• “Sibling” connections to other Liebert MPX or Liebert MPH rack PDUsystems

For North American MPXmodels, the RPC-1000 or RPC2 communications modules are field-installed in
the MPX PEM slot. European MPXmodels are equipped with factory-installed communications modules on
monitored MPX PEMs.

1.4.1 RPC-1000 Communications Module

The RPC-1000 communications module is equipped with two RJ45 jacks for connecting to external
devices and requires no custom cables. See the following figure and table for port descriptions.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 11

Figure 1.6 RPC-1000™ Communications Module

Table 1.6 RPC-1000 Communications Web Card Port Descriptions

ITEM PORT DESCRIPTION

Used for:

1 Network

2 Display Used to connect the optional RPC BDM.

3 Sensor Used to connect optional Liebert® SN sensor accessories.

4 Link

5 Not applicable RPC-1000 Communications web card

• 10/100 Mbps LAN connection via an Ethernet cable (not included).

• Creating an optional rack PDUarray by interconnecting additional Vertiv rack PDUs.

Used for:

• Local configuration throughinterconnection to a computer.

• Creating an optional rack PDUarray by interconnecting additional Vertiv rack PDUs.

1.4.2 RPC2™ Communications Module

The RPC2 communications module has three RJ45 jacks for connecting to external devices and requires
no custom cables. See the following table for port descriptions.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 12

Figure 1.7 RPC2™ Communications Module

Table 1.7 RPC2 Communications Module Port Descriptions

ITEM PORT DESCRIPTION

1 Serial Used for the RS232 serialconsole using the CLI

2 USBMicro-AB Used for the USB memory stick

3 Sensor Used to connect optional Liebert® SN sensor accessories

4 Display Used to connect the RPC BDM

Used for:

5 Link

6 Network

7 Reset button access hole Used to reboot or reset the module to its factory default settings

• Local configuration throughinterconnection to a computer

• Creating an optional rack PDUarray by interconnecting additional Vertiv rack PDUs

Used for:

• 10/100/1000 Mbps LAN via an Ethernet cable (not included)

• Creating an optional rack PDUarray by interconnecting additional Vertiv rack PDUs

1.4.3 Accessing information on the RPC BDM

The RPC BDM is an optional local display that shows monitored data from all connected Liebert® MPX™
and Liebert MPH rack PDUsystems. You can access display information from a navigation switch on the
RPC BDM. The switch is located beneath the Vertiv logo on the RPCBDM. It is connected by a cable to the
communications module which allows you to locate the display for a local reading.

The RPCBDMcomes with a connector cable and mounting provisions. You can connect up to four rack
PDUs in a rack PDUarray to a single display.

For detailed BDM operation instructions, see the Liebert® RPC2™ Communications Module Installer/User
Guide.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 13

This page intentionally left blank.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 14

2 INSTALLATION AND ASSEMBLY

WARNING! You must complete all configuration steps before turning on equipment connected
to the Liebert MPX rack PDU. Never work on energized equipment.

2.1 Installing the MPX™PRC in a Rack

Vertiv™ recommends installing the MPX PRC in the rack before attaching the MPX™PEM and MPX™BRM
modules to the MPXPRC.

Before installation, consider the number of cables to be routed in the rack. Placing the MPX PEM at the
end of the MPX PRC that is nearest the entry point for its input power cable can ease cable routing and
help separate control and power cables to reduce electromagnetic interference.

The following mounting hardware is included with the Liebert MPX rack PDU:

• Two Z-shaped brackets

• Two L-shaped bracket

• Six spring-nuts, M5

• Six screws, M5x10

• Two mounting screws

You will need the following tools for installation:

• Slotted screwdriver

• 4 mm Allen wrench

2.1.1 Preparing the Liebert MPX rack PDUfor mounting

To preparethe Liebert MPXrack PDUfor mounting:

1. Insert two spring nuts into the T-slot on the back of the MPX PRC, one near either end (see

Installing the MPX™PRCMounting Button on page 16).

2. Position each spring nut where the bracket will be installed by pressing down on the spring nut
with a small, pointed object and sliding it into place.

NOTE: Either the L- or Z-shaped brackets can be used to secure the MPX to the intended mounting
position.

3. Thread an MPX mounting screw into the spring nut and tighten, but leave enough space for
the bracket to slip over the screw’s head to rest on the body of the screw.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 15

Figure 2.1 Installing the MPX™PRCMounting Button

Table 2.1 MPX PRC Mounting Button Components

ITEM DESCRIPTION

1 Springnut

2 MPXPRC

3 T-slot

4 Mounting button

5 Mounting button screw

2.1.2 Attaching brackets

The brackets must be installed before the PDUis installed.

NOTE: The brackets will attach the Liebert MPX rack PDU more securely if one is near the top of the
unit and one is near the bottom.

To attach brackets to an upright frame member:

1. Insert two spring nuts into the T-slot on a rear upright frame member.

2. Position the two spring nuts to accommodate screws inserted through the T-slots in the
brackets. To move the spring nuts, press down on each with a small, pointed object and slide
each into position.

3. Hold an L-shaped bracket in place and attach it with two of the M5x10 screws with hex heads.

4. Tighten the hex-head screws firmly with the Allen wrench.

5. Repeat steps 1 to 4 for the lower L-shaped bracket.

6. After the brackets are attached, hang the Liebert MPX rack PDUin the rack by inserting the
mounting screws into the slots on the brackets.

7. Tighten the mounting screws securely.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 16

Figure 2.2 Bracket Installation

Table 2.2 Bracket Installation Components

ITEM DESCRIPTION

1 Rack frame member

2 Springnut

3 L-shapedbracket

4 Z-shaped bracket

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 17

Figure 2.3 Installing a Liebert® MPX™ Rack PDUon a Bracket

Table 2.3 Installing a Liebert MPX Rack PDUon a Bracket

ITEM DESC RIPTION

1 Rack frame member

2 Mounting button inserted into rack bracket keyhole

3 MPXPRC

4 Springnut into rack frame member

5 Grounding wire

2.2 System Assembly

The following sections provide guidance and references to documents required to assemble a Liebert
MPXrack PDUsystem.

2.2.1 Installing an MPX™ PEM onto the MPX™ PRC

After the MPX PRC has been installed in the rack, it is ready for the installation of an MPX PEM.

Consider the following prior to beginning installation:

• Elevated Operating Ambient - If installed in a closed or multi-unit rack assembly, the operating
ambient temperature of the rack environment can be greater than the 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 achieved due to uneven mechanical loading.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 18

• Circuit Overloading - Connection of the equipment to the supply circuit can affect circuit load,
overcurrent protection and supply wiring. Adhere to equipment nameplate ratings to prevent
circuit overloading.

• Reliable Earthing - Reliable earthing of rack-mounted equipment should be maintained.
Particular attention should be given to supply connections other than direct connections to
the branch circuit, for example, use of power strips.

WARNING! The MPX rack PDUcontains hazardous voltage that creates a risk of arc flash and
electric shock resulting in equipment damage, injury or death. The MPXPEMmust be properly
and securely installed on the MPX PRC. Vertiv strongly recommends that the MPX PEM be
installed only by an individual who has been properly trained and qualified to perform electrical
work.

WARNING! Connect only one MPX PEM to an MPX PRC. Connecting more than one MPX PEM
could cause cross-conduction. Cross-conduction can cause damage to the MPX and cause the
upstream OCPD to trip, or can result in circuit current levels that may exceed the OCPD A.I.C.
ratings.

WARNING! Whenever the MPX PEM is connected to power, the connectors on the bottom are
energized with hazardous voltage.

WARNING! Connect input power only after the MPX PEM is properly installed on the MPX PRC
and the MPX IPC (Input Power Cord) is properly connected to the MPX PEM.

WARNING! Connect input power to the Liebert MPX rack PDUonly after the MPX PEM is
properly connected to the MPX PRC. Failure to do so may subject you to hazardous voltages.

Tools Required

The following tools are required for installation:

• Tamper-resistant No. 1 Torx® screwdriver bit, included with MPX PEM

• No. 1 PoziDriv® screwdriver bit, included with MPX PEM

• No. 1 Phillips® screwdriver, field-supplied

Before beginning to assemble the Liebert MPX rack PDU:

• Ensure that utility power is not connected to any module or component.

• Ensure that no equipment is connected to the MPX BRM. Observe all facility Lockout /Tagout
procedures where applicable.

• Ensure that the circuit breaker on the MPX BRM is off.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 19

To attach an MPX PEM to an MPX PRC:

1. Ensure the module’s circuit breaker is in the off/open position and the screw latches at each
end of the MPX PEM are positioned to fit into the MPX PRC slot.

Figure 2.4 MPX™ PEM Bottom View

2. Position the MPX PEM so the power blades align with the power bus on the MPX™ PRC.

Figure 2.5 MPX PEM and PRC End View

3. Hold the MPX PEM at an angle against the MPX PRC end cap and press down so that the MPX
PEM power blades engage firmly into the MPX PRC power bus.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 20

Figure 2.6 MPXPRCEnd Cap Positioning

4. Use the provided tamper-resistant Torx® (TR20) screwdriver bit to press each screw latch
downward. Turn the screw latch 90 degrees (one-quarter turn) to seat the locking tab. Secure
the locking tab by turning the screw latch an additional 180 degrees (one-half turn) until it
locks.

WARNING! Do not use power tools or pneumatic equipment to secure the screw latch. Do not
turn the screw latch more than 270 degrees (a three-quarter turn).

NOTE: If using a torque-limiting screwdriver, carefully press the screw downward first before turning.
To prevent damage to the latches, do not exceed a maximum torque of 18 lbs/in (2 Nm).

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 21

Figure 2.7 Securing the MPX™PEMto the MPX™PRC

5. Conduct a visual inspection to verify the MPX PEM has been properly installed. A slight side-to­side rocking of the module should not cause separation from the MPX PRC surface.

6. (Optional for the MPXPEM-NVAXXAX model only) Insert the MPX IPC connector to the MPX
PEM installed on the MPX PRC. See the Liebert® MPX™ IPC Quick Installation Guide for
installation steps.

7. If used, install the optional RPC-1000 web card or RPC2 communications module. See the
Liebert® RPC™ Web Card User Manual (SL-20825) or the Liebert® RPC2™ Communications
Module Installer/User Guide for further instructions.

2.2.2 Installing an MPX IPC to a variable capacity MPX PEM

See the MPX™IPCQuick Installation Guide (SL-20838 REV2/590-1599-501A) for detailed instructions to
attach an MPXIPCto a North American variable capacity MPX PEM.

Variable-capacity MPX PEM models require an MPX IPC to connect to utility power. See Connecting the

MPX™ IPC for variable capacity models on page 8 for a description. The MPX IPC is available with various

input plugs for single-phase or three-phase power systems, up to 30A.

Quick-connect couplings are attached to the MPX™ IPC to ease proper connection to the MPX™ PEM. The
connectors fit only one way, mating the proper input, ground and neutral wires on the power cord to the
MPX PEM.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 22

The locking clamp reduces the chance of accidental disconnection of the MPX IPC because the clamp
must be removed before the connector can be disengaged. The locking clamp is optional and not
required for typical Liebert® MPX™ system applications.

To attach the MPX IPC locking clamp:

1. Verify the NEMA plug is disconnected from power and insert the MPX IPC connector to the
MPX PEM.

2. Rotate the lower arm of the clamp clockwise wide enough to place around the MPX IPC
connector.

3. Wrap the clamp around the MPX IPC connector so the interior clamp prongs fasten to the MPX
IPC connector and the retaining screw is in the upper right corner.

4. Rotate the lower arm of the clamp counterclockwise until the screw plate aligns with the
retaining screw.

5. With the screw plate aligned, tighten the screw to hold the lower arm in place.

Figure 2.8 MPXIPCClamp Installation

NOTE: The clamp can be installed in 180 degree orientation to easily access the retaining screw for the
MPX system mounted on the opposite side of the rack space.

2.2.3 Installing an MPX™BRMto an MPX™PRC

During normal operation, MPX BRMs are hot-swappable only when unloaded. While adding or removing an
MPX BRM, no user loads are to be connected to the MPX BRM. Attempting to do so may damage the
Liebert MPX rack PDUor connected equipment.

To achieve load balancing, install MPX BRMs with an equivalent number of different line configurations
(L1-L2, L2-L3, L3-L1, L1-N, L2-N, L3-N).

For detailed instructions to install the MPXBRM on an MPXPRC, see the Liebert® MPXBRMQuick
Installation Guide (SL-20823_REV3/590-1623-501A).

NOTE: The Liebert® MPX™ rack PDUoperates properly with gaps between modules. However, leaving a
gap between modules limits the number of modules you can mount. Decorative covers are available to
reserve the adequate space on the MPX™ PRC and to protect any unused sections of the unit’s
surface.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 23

WARNING! The Liebert MPX rack PDU contains high voltage that can cause serious personal
injury or death. The unit must be installed in a restricted-access location.

To attach an MPX™ BRM to the MPX PRC:

1. Ensure the module’s circuit breaker is in the off/open position and ensure the screw latches at
each end of the MPX branch receptacle module (BRM) are positioned to fit into the MPX power
rail chassis (PRC) slot.

Figure 2.9 MPX™ BRM Bottom View

2. Position the module so the power blades fit into the power bus on the MPX PRC.

3. Press the module firmly onto the MPX PRC until the bottom of the MPX BRM is flush to the
surface of the MPX PRC.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 24

Figure 2.10 MPX™ BRM and PRC End View

4. Use a Pozidriv® (PZ1) screwdriver to press each screw latch downward. Turn the screw latch 90
degrees (one-quarter turn) to seat the locking tab. Secure the locking tab by turning the
screw latch an additional 180 degrees (one-half turn) until it locks.

WARNING! Do not use power tools or pneumatic equipment to secure the screw latch. Do not
turn the screw latch more than 270 degrees (a three-quarter turn).

NOTE: If using a torque-limiting screwdriver, carefully press the screw downward first before turning.
To prevent damage to the latches, do not exceed a maximum torque of 18 lbs/in (2 Nm).

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 25

Figure 2.11 Securing the MPX™BRMto the MPX™PRC

5. Conduct a visual inspection to verify the MPX BRM has been properly installed. A slight side­to-side rocking of the module should not cause separation from the MPX PRC surface.

2.2.4 Installing a communications module

You can install a communications module in the North American MPX™ PEM models to monitor the
Liebert® MPX™ rack PDU over a network or with an RPC BDM.

NOTE: The ports on the communications modules are designated by icons.

For complete details, refer to the Liebert® RPC™ Web Card User Manual (SL-20825) or the Liebert®
RPC2™ Communications Module Installer/User Guide found on Vertiv’s web site, www.vertivco.com.

To install a communicationmodule:

NOTE: See MPX PEM Features on page 7 for a diagram of the MPXPEM.

1. Locate the communication module bay on the MPX PEM.

2. If necessary, remove the cover plate.

3. Insert the communications module into the MPX PEM and secure it with the provided screws.

4. Connect a user-supplied Ethernet cable to the LAN port.

5. Connect the Ethernet cable to a computer.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 26

2.2.5 Installing optional temperature and humidity sensors

The Liebert® SN temperature and humidity sensors assist in monitoring conditions in the rack. You can
install the sensors in any area to monitor temperature and humidity levels. The sensors are optional and
designed for installation in a rack without tools. Each sensor connects to the communications module,
which reads rack conditions based on Liebert MPX rack PDUmonitoring methods. The following is a list of
sensor types:

• SN-Z01 - Single cable with a single temperature sensor

• SN-Z02 - Single cable with three temperature sensors

• SN-Z03 - Single cable with three temperature and one humidity sensor

• SN-T - Modular with a single temperature sensor

• SN-TH - Modular with a single temperature and a single humidity sensor

• SN-2D - Modular with two-door contact inputs

• SN-3C - Modular with three dry contact inputs

• SN-L1 - Modular leak zone sensor with a one foot cable

• SN-L20 - Modular leak zone sensor with a 20 foot cable

Modular Liebert® SN sensors allow users to build custom configurations by connecting multiple sensors
to a single communications module.

This manual describes the steps for attaching a single sensor with a bracket to a rack frame member. For
details on other mounting locations and methods, refer to the Liebert® Integrated Sensors Quick-Start
Guide (SL-20840) or the Liebert® RPC™ Web Card User Manual (SL-20825) available at Vertiv’s web site,
www.VertivCo.com.

2.2.6 Installing an optional RPC™ BDM

The RPC BDM can be mounted in the rack through the slot on the back of the module using the included
hardware or with a cable tie. Both methods allow you to move the RPC BDM to a different place in the
same rack or to another rack.

Included Hardware

The following hardware is included with the RPCBDM:

• One RPC BDM

• One M5 spring nut

• One spacer sleeve

• One mounting button

• One M5 screw

• One cable clip

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 27

Figure 2.12 RPC™BDM

Table 2.4 RPC BDM Components

ITEM DESCRIPTION

1 Scan switch

2 RJ45 communication and power input port

To install an RPCBDMon a rack frame:

1. Determine the mounting location on the frame member where the RPC BDM will be installed.

2. Insert a spring nut into a T-slot and flip it so that it is square in the slot as shown in the
following figure.

Figure 2.13 Inserting a Spring Nut into a T-slot

3. Insert the MPX™rackPDUscrew into the spacer sleeve.

4. Insert the MPXrack PDU screw into the spring nut and tighten securely with a flat-head
screwdriver.

5. Hang the RPC BDM on the screw with the hooded mounting slot on the back of the RPC BDM
(see the following figure).

6. Connect the RPC BDM to the communications module with an Ethernet cable.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 28

Figure 2.14 RPC BDM™ Installation

Table 2.5 RPC BDM Installation

ITEM DESC RIPTION

1 Installation configuration with cable tie

2 Installation configuration with mounting button

3 Frame member

4 Cable tie

5 Mounting button attached with spring nut to frame member

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 29

This page intentionally left blank.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 30

3 SYSTEM FUNCTIONAL TEST

The following section contains an assembly checklist and a functionality test for theLiebert® MPX™ rack
PDU.

3.1 Assembly Checklist

Verify all components are properly assembled. Failure to do so could result in a serious injury or
equipment damage. Ensure the following:

• MPX™ PRC is securely attached to the rack.

• MPX™ PEM is attached to the MPX PRC and is securely locked on to the MPX PRC (see

Installing an MPXPEMto an MPXPRC on page 1).

• Power input cable is attached to the MPX PEM, if applicable.

• Optional communications module is installed in the MPX PEM.

• MPX™ BRMs are installed (see Installing an MPX™BRMto an MPX™PRC on page 23).

• Sum of electrical loads does not exceed maximum values shown on the Liebert MPX rack
PDUrating labels.

• Input power supply ratings and connections are compatible with the specifications of the unit
being installed.

3.2 Functionality Test

Perform the following steps to determine whether the Liebert MPX rack PDU is ready for use. Failure to
follow these steps in the documented sequence could result in serious injury or equipment damage.

To conduct the functionality test:

1. Ensure that all circuit breakers on the MPX BRM units are off.

2. Verify the MPX PEM and MPX BRM operating voltages are the same and match the input
power source:

• Confirm that only one MPX PEM is installed on the MPX PRC.

• Connect the Liebert MPX rack PDU to input power.

3. Attach the supplied communication cables to the communications module, if one is installed in
the MPX PEM.

4. Check the phase power LEDs on the MPX PEM to verify that input power is present. The
appropriate number of lights on the MPX PEM should be green and lit but not flashing:

• If input power is single-phase, L1 is green.

• If input power is single-phase 208-240VAC (North America only), L1 and L2 are green.

• If input power is three-phase, L1, L2 and L3 are green.

NOTE: The LEDs are not provided on Elementary MPX PEM models.

5. Switch on the circuit breaker of each MPX BRM where the load is connected.

6. Verify that each attached MPX BRM is displaying a non-repeated identifying number in the
Number LED window beside the circuit beaker.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 31

NOTE: The identifying numbers’ order in the display may not match the mapping of their physical
location on the MPX PRC. Elementary MPX BRM models are not furnished with an LED identification
window.

7. If any MPX™ BRM units are receptacle management models, the LEDs beside the receptacles
are illuminated.

8. Make sure the equipment to be connected to the Liebert MPX rack PDU is switched off.

9. Connect the equipment to the MPX BRMs.

10. Switch on the test equipment or connected load to verify proper operation.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 32

4 OPERATING AND CONFIGURING RACK PDUCARDS

The Liebert® RPC2™ communications module is an optional rack PDUcard that allows you to monitor and
configure components connected to the MPX™unit through a web-based interface. The card provides
enhanced monitoring and control, enabling you to manage rack equipment locally or from a remote
location. With the rack PDUcard, you can determine power usage, switch receptacles on some units on
and off and troubleshoot input power supply problems.

The rack PDUcard manages and monitors different types of MPX™ BRMs installed on the same Liebert
MPX rack PDU. Additional features are beneficial for Liebert MPX rack PDUs that require closer
monitoring. The RPC2 communications module also supports managing and monitoring the Liebert MPX
rack PDUwith SNMP, Liebert® Nform™, Liebert® SiteScan® and third-party management systems.

When connecting the rack equipment to the Liebert MPX rack PDU’s receptacles, arrange cables and
connections in a neat and workmanlike manner. When possible, route power lines away from the signal
and communication lines. For power management purposes, record the receptacle where each piece of
equipment is connected. Receptacles on the Liebert MPX rack PDUhave a numerical designation. For a
Liebert MPX rack PDUwith more than one circuit, the outlets are named with numbers and are grouped
by branch with a number referring to the proper circuit breaker.

4.1 Configuring Rack PDUCards

4.1.1 Configuring the RPC2 communications module

The RPC2 communications module is factory set for Dynamic Host Configuration Protocol (DHCP),
making it ready for service immediately. The module can also be configured for operation on a network
using a static IP address.

To configure a module for a network that uses static IP:

1. Connect a straight-through Ethernet cable (not included) to the module’s link port.

NOTE: The card’s Link port should be used only for local configuration through interconnection to a
laptop. Do not connect the cable from the Link port to your company LAN.

2. Connect the other end of the Ethernet cable to a laptop.

3. Configure the laptop’s IP settings to communicate on a 192.168.1.X network with the following
settings:

• IP address: 192.168.1.9

• Subnet mask: 255.255.255.252

• Default gateway: 192.168.1.1

4. Open a web browser and enter the proper IP address. See Static IP Settings for the RPC2

Communications Module Through the Link Port on page 33for a list of static IP addresses.

Table 4.1 Static IP Settings for the RPC2 Communications Module Through the Link Port

DEV ICE RACK PDU 1 RACK PDU2 RACK PDU3 RACK PD U 4

Laptop Computer 192.168.1.9 192.168.1.5 192.168.1.1 192.168.1.13

Link Port 192.168.1.10 192.168.1.6 192.168.1.2 192.168.1.14

Subnet Mask 255.255.255.252 255.255.255.252 255.255.255.252 255.255.255.252

NOTE: The RPC2 communications module configures sibling connections automatically. You must
disconnect the network cables for at least 30 seconds. The module reconfigures automatically upon

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 33

reconnection. For information about sibling connections, see the RPC2™ Communications Module
Installer/User Guide.

5. Enter admin for both the login username and password, then click the Login icon or press Enter.

6. Click the S y stem tab, then click S e t t in g s - N e t w o r k in the navigation tree.

7. Click E d it in the right pane.

8. (Optional) The default speed/duplex for the Ethernet port is Auto 1000 Mbps/Full Duplex
(automatic). Use the Speed/Duplex drop-down menu to change this.

9. Enter the hostname in the Host Name field.

10. Select S tat ic for the IPV4 Boot Mode and enter the IP address, subnet mask and default
gateway in the proper fields. See your network administrator for these settings.

-or-

Select S t a t ic for the IPV6 Boot Mode and enter the subnet prefix length and default gateway in
the proper fields.

11. Click the Sa ve icon when finished and click the R eb o ot icon to restart the module.

4.1.2 Configuring the RPC-1000™ communications web card

The card is factory-set for DHCP. If you require a static or Boot Mode IP network configuration, be sure to
change the Boot Mode, as follows.

To change the Boot Mode:

1. Insert an additional Ethernet cable (user-supplied) into the card’s expansion/management
port.

CAUTION: The card’s expansion/management port should be used ONLY for local
configuration through interconnection to a laptop. Do not connect the cable from the
expansion/management port to your company LAN.

2. Insert the other end of the Ethernet cable into a laptop.

3. Configure the laptop’s IP settings to communicate on a 192.168.1.X network:

• IP address: 192.168.1.9

• Subnet mask: 255.255.255.252

• Default gateway: 192.168.1.1

4. Open a web browser, enter the IP address of the expansion/management port, then press enter:

• For a single Rack PDU or Rack PDU #1 in a Rack PDU Array, enter http://192.168.1.10.

• Each PDU is factory-configured as PDU #1. This requires assigning a new number to
specify the position of each additional rack PDU in a rack PDU array and rebooting the
card. This process automatically assigns the IP addresses and subnet masks shown in IP

Addresses in a Rack PDU Array on page 35 for rack PDU #2, 3 and 4.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 34

Table 4.2 IP Addresses in a Rack PDU Array

POSITION IN RACK PDU ARRAY

IPADDRESS

RACK PDU1 RACK PDU2 RACK PDU3 RACK PDU4

Expansion/Management Port 192.168.1.10 192.168.1.6 192.168.1.2 192.168.1.14

LAN Port User-configured 192.168.1.9 192.168.1.5 192.168.1.1

Subnet Mask 255.255.255.252 255.255.255.252 255.255.255.252 255.255.255.252

5. Click the C o n fig u r e tab, then click N etwor k Sett in g s in the left navigation pane.

6. When prompted for a username and password, enter Liebert (case-sensitive) for both. Click O K ,

then read the message in the next window.

7. Click E d it in the right pane and update the following settings:

• The default Speed/Duplex for the Ethernet port is Auto (automatic). To change this,
choose from the Speed/Duplex drop-down list.

• Choose the Boot Mode: Static or BootIP. (The default is DHCP.)

8. Click S a v e to save any changes (or R eset to cancel). A Notice window displays a reminder to
reinitialize the card. Click OK .

9. Make other changes as needed in the C on fig u r e tab.

10. To complete the configuration, click R estart in the left pane, then click the R estart button in
the right pane to commit the changes and reboot the card.

11. After the rack PDU array is configured as shown in IP Addresses in a Rack PDU Array on page
35, use Laptop IP Settings for Liebert® RPC™ Addresses on page 35 to make changes to the
cards in the array using the expansion/management port. Laptop IP Settings for Liebert®

RPC™ Addresses on page 35 details the laptop IP settings to use with the corresponding rack

PDU card IP addresses.

Table 4.3 Laptop IP Settings for Liebert® RPC™ Addresses

POSITION IN RACK PDU ARRAY

IPADDRESS

RACK PDU1 RACK PDU2 RACK PDU3 RACK PDU4

Laptop Computer 192.168.1.9 192.168.1.5 192.168.1.1 192.168.1.13

Expansion/Management Port 192.168.1.10 192.168.1.6 192.168.1.2 192.168.1.14

Subnet Mask 255.255.255.252 255.255.255.252 255.255.255.252 255.255.255.252

4.1.3 Indicators

NOTE: Do not continue to use the Liebert MPX™ rack PDUif the monitoring interface LEDs are not in
accordance with these operating instructions. Refer all faults to your local dealer, Vertiv representative
or Vertiv Distributed Processing Applications Engineering.

One or more phase power LEDs on the MPX™ PEM are illuminated steady green when input power is
present and within tolerance. If input power is three-phase, all three phase power LEDs are illuminated
steady green.

Each MPX™ BRM displays a unique identifying number on the branch numeric indicator display adjacent
to the circuit beaker. If any MPX BRMs are receptacle management models, the LEDs adjacent to the
receptacles are lit.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 35

4.2 Operating Rack PDUCards

Depending on the model of the communications module, see the Liebert® RPC™ Web Card User Manual
(SL-20825) or the RPC2™ Communications Module Installer/User Guide for instructions to operate a
Liebert MPX™ rack PDUequipped with a communications module.

You can download the manuals from the Vertiv Web site www.VertivCo.com.

4.2.1 Connecting to the rack PDUcards

After the RPC2 communications module is installed and configured, the card is ready to monitor and
manage Liebert MPX rack PDU receptacles.

If the card is not installed and configured, refer to Installing a communications module on page 26 and

Configuring Rack PDUCards on page 33.

To connect to the rack PDU cards:

1. In a web browser go to http://192.168.1.10 to display the Liebert MPX rack PDU's web page.

2. When prompted for a username and password, enter the factory default values as noted in the
Liebert® RPC2™ Communications Module Installer/User Guide.

NOTE: For the RPC-1000 communications web card, the configuration capabilities are protected by a
username and password combination.

3. After entering the factory default username and password, change both for security purposes.

4. Configure or access information about the Liebert MPX rack PDUin the Device Explorer view.

4.3 Operation without Rack PDUCards

Operating the Liebert MPX rack PDU without the optional rack PDU cards limits functionality.

To operate the MPXrack PDUwithout a rack PDUcard:

1. After the unit is installed and assembled, verify the rack equipment is turned off.

2. Connect the rack equipment to the receptacles.

3. Connect input power to the MPX™ PEM and switch on the circuit breaker on each MPX™ BRM.

4. Turn on the rack equipment according to the manufacturer’s instructions.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 36

5 MAINTENANCE

Vertiv recommends setting up a maintenance schedule that includes the following:

• Remove dust from the unit’s exterior with a clean, dry cloth.

• Check all module and cabling connections to ensure they are secure.

NOTE: If a faulty MPXPEM connection is suspected, all input power to the unit must be removed
before making any adjustment to the MPXPEM. See Installing an MPXPEMto an MPXPRC on page 1,
if adjustments are required.

5.1 No User-Serviceable Parts

The Liebert® MPX™ rack PDU contains no user-serviceable parts. If you need support or have questions
about your Liebert MPX rack PDU, contact Vertiv™ Technical Support or your local Vertiv representative.
Do not attempt to service this product yourself.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 37

This page intentionally left blank.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 38

6 TROUBLESHOOTING

This section contains troubleshooting information for the Liebert® MPX™ rack PDU and the RPC-1000™
and RPC2™ communications modules.

6.1 Liebert MPX Rack PDU

This section covers various symptoms you may encounter when using the Liebert MPX rack PDU and
provides a troubleshooting guide to identify the source of the problem and remedial action for the
situation. If the fault persists, contact Vertiv Technical Support.

NOTE: The MPX contains no user-serviceable parts. Vertiv advises against disassembling and
attempting to repair any damaged MPX module.

6.1.1 MPX™ PEM indicators and LEDs

The phase power LEDs on the MPX PEM provide information about the input power conditions to the
Liebert MPX rack PDU. The LEDs illuminate green in a steady state when normal input power
configurations are available.

WARNING! Never remove an MPX PEM from the MPXPRCwhile input power is connected. The
MPXPEM is not hot swappable. An MPX PEM contains live conductors on the MPX PRC side;
exposure to these conductors while under power can result in severe injury and death.

Table 6.1 MPX PEM LED Indications

CONDITION

Phase power
indicators are
greenand
steady.

Phase power
indicators are
off.

Audible alarm
sounds and
phase power
indicator
flashes.

PROBABLE
CAU SE

Unit is
receiving
acceptable
input power.

Input under
voltage or
input power
unavailable.

Input
overcurrent or
undercurrent
condition.

CORREC TIVE ACTION

• No action is required; Normal operation.

• L1 indicator = single-phase, L-N.

• L1-L2 indicators = single-phase, L-L (NA models only).

• L1-L2-L3 indicators = three-phase, L-L-L.

• Confirm the input power cord is securely connected to a valid power source.

• Check if the upstream circuit breaker(s) feedingpower into the MPX have tripped. Reset the upstream breaker
and/or correct the site condition that caused the breaker to trip. If the breaker is tripped, disconnect the
equipment plugs from the MPX BRMs and reset the circuit breaker. If the breaker trips with no equipment
connected to it, verify system configuration using this manual. If the problem persists, contact Vertiv. If the
breaker does not trip, restore the equipment plugs one at a time to determine if the system is overloaded.

• Confirm the input supply voltage is within spec and the source is not operating outside of the acceptable limits.

• Review the PDUovercurrent or undercurrent warningand alarm thresholds (these are user-set).

• If an undercurrent conditionis indicated, check whether the loads have been removed, are operatingin an
unexpected low power mode or were turned off.

• If an overcurrent condition is indicated, reduce the current draw from one or more receptacles.

Alarm Silence/Test button

The MPX PEM Alarm Silence/Test button has multiple modes of operation. Pressing the A la r m
Silen ce/T est button tests or silences audible alarms. Functions include:

• Alarm silence function - Momentarily pressing the button when an alarm condition is present
silences the audible alarm.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 39

• Alarm test function - The audible alarm can be tested by momentarily pressing the button
when an active alarm condition is not present.

• MPX™PEM reset function - This function is useful during troubleshooting to confirm the
communications module is communicating with each MPX™BRM.

Pressing and holding the alarm silence button for more than five seconds when an active alarm
condition is not present causes the communications module to re-establish communication
with all the modules, the MPXPEM to reset and its line LEDs to go dark momentarily.

When you initialize an MPXPEM reset, the branch numeric indicator display cycles for each
MPXBRM. The MPXPEM reset function takes approximately 30 seconds. When complete, each
MPXBRM displays a unique numeric value within its branch numeric indicator display window.

NOTE: The MPXPEM reset function does not interrupt critical power to the MPXPEM or any of the
MPXBRM modules.

6.1.2 MPX BRM indicators and LEDs

MPX BRMs have a branch numeric indicator display window that uniquely identifies each module.

Table 6.2 MPX BRM Branch Numeric Indicator Display Numbers

CONDITION

A persistent dot
appears in the MPX
BRM display
window. MPX BRM
ID# / numeric value
is not displayed.

A persistent dot and
MPX BRM ID# /
numeric value
appear together in
the MPX BRM
display window.

MPXBRM ID# /
numeric value
displayed is “0”.

MPXBRM ID# /
numeric value is
flashing.

MPXBRM ID# /
numeric value is
alternated with a “u”,
and audible alarm.

MPXBRM ID# /
numeric value is
alternated with an
“o”, and audible
alarm.

Audible alarm
sounds and phase
power indicator
flashes.

PROBABLE
CAU SE

MPXBRM is not
communicating with
the communications
module.

A firmware update to
the MPXBRM is in
process.

A circuit breaker in
the MPXBRM is
open.

Branch under­current condition.

Branch over-current
condition.

Input over-current or
under-current
condition.

CORREC TIVE ACTION

• Confirm MPXBRM moduleis properly seated on the MPXPRC. Refer to the MPXBRM Quick Start
Guide.

• If all MPXBRMs display the dot, confirm the MPXPEM module is properly seated on the
MPXPRC. Refer to the MPXPEM Quick Start Guide. WARNING: Never remove an MPXPEM
from the power distributionunit while input power is connected. The MPXPEM is not hot­swappable.

• Remove MPXBRM from the MPXPRC. Turn the MPXBRM over and check for signs of physical
damageto the power and communications contacts.

• Ensure the communications bus in the MPXPRC is clean and free of dirt and debris. If necessary,
disconnect power and wipe the bus with a dry, lint-free cloth.

• If the communications bus appears damaged, contact Vertiv support.

• Allow the firmware update to finalize. This may take several minutes depending on the MPX
configuration and network performance.

• Close circuit breaker.

• One or more of the MPXBRM receptacles is overloaded. Reduce current draw from one or more
receptacles.

• Review the branch undercurrent alarm thresholds (these are user-set).

• Check whether the loads have been removed, are operating in an unexpected low power mode or
were turned off.

• Review the branch overcurrent alarm thresholds (these are user-set).

• Reduce the current draw from one or more receptacles.

• Review the receptacle overcurrent or undercurrent warning and alarm thresholds (these are user­set).

• If an undercurrent conditionis indicated, check whether the loads have been removed, are
operatingin an unexpected low power mode or were turned off.

• If an overcurrent condition is indicated, reduce the current draw from the affected receptacle.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 40

"Lights-out" condition

After updating or changing your MPX™ system, you may observe an operating condition in which none of
the LEDs on any of the modules are illuminated. Although the MPX system is receiving power, all of its LED
indicators are off. This condition is indicative of an incomplete firmware update.

The MPX™ PEM and the MPX™ BRMs operate in bootloader mode when the firmware fails to update
completely. In bootloader mode, all LEDs are off, and the module appears non-functional. However, the
bootloader is still in communication with the communication module and the normal operating mode can
be restored.

To recover from "Lights-out" condition:

1. Assemble a test system that comprises a known-working MPXPEM with a known-working
communication module installed onto the MPXPRC.

2. Install the malfunctioning MPXBRMs exhibiting lights-out behavior in which no LEDs are lit
when powered on.

NOTE: It is recommended to attempt to troubleshoot one MPXBRM at a time, until successful results
are achieved.

3. Establish network communications with the communication module according to the Liebert®
RPC™ Web Card User Manual (SL-20825) or the Liebert® RPC2™ Communications Module
Installer/User Guide (590-1380-501A).

4. Copy the firmware file (*.epm) to a folder on your laptop.

NOTE: If necessary, the firmware can be obtained from the Vertiv website https://www.VertivCo.com/

5. Browse to the http://192.168.1.10URL.

NOTE: The System Status area displays an alert that a firmware update is required.

6. Perform a firmware update according to the Liebert® RPC™ Web Card User Manual (SL-20825)
or the Liebert® RPC2™ Communications Module Installer/User Guide (590-1380-501A).

WARNING! If you are running a firmware upgrade for an RPC-1000 communication module, do
not change the browser URL, close the browser window or interrupt the network connection
until the firmware update is complete!

NOTE: The firmware update can take several minutes, depending on the MPX configuration and
network performance.

7. If the firmware update completes successfully, the MPXBRM's LED numeric value display will
display a number. If the MPXBRM is a Receptacle Managed MPXBRM, all receptacle LEDs will
be lit solid green, unless the MPXBRM was previously configured with some receptacles to be
powered off. After the communications module restarts, the system is fully operational.

-or-

If the firmware update completes with an error and there is no change in the LED state of the
MPXBRMs, then the affected MPXBRMs need to be replaced. Please contact Vertiv Technical
Support or your Vertiv Sales office.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 41

When you have successfully recovered one MPXBRM, repeat the steps with the same MPXPEM and
communications module to recover any additional MPXBRMs exhibiting the lights-out condition. You can
push a firmware update to up to six MPXBRMs at a time using the MPX test system. It can take several
minutes to update multiple MPXBRMs, depending on the MPX configuration and network performance.

6.2 RPC-1000™ Communications Web Card Basic Troubleshooting

This section contains troubleshooting procedures for the RPC-1000 communications web card. See the
Liebert® RPC2™ Communications Module Installer/User Guide (590-1380-501A) for detailed
troubleshooting procedures for the RPC2 communications module.

The Liebert® RPC-1000 and RPC 2 communications modules enable you to update the firmware of the
communications modules, as well as the firmware of each individual module on the MPX™ PDU, as new
features and capabilities or service patches become available. A firmware update may take several
minutes, depending on the MPX configuration and network performance.

During the update, the communications module upgrades all connected MPX components, including the
MPX™PEM, MPXBRMs and the optional RPC BDM. If a component is not connected, it will not be
upgraded and the firmware update process must be repeated when the component is added to the
system.

Maintaining dissimilar firmware on one or more components of an MPX PDU may cause intermittent or
undesirable operation such as loss of parametric information, or conflicts with the numeric indicator
assignments on the MPXBRM modules.

Upgrade firmware can be downloaded from the Vertiv website at www.VertivCo.com.

6.2.1 Basic troubleshooting

The following table lists common issues that can occur with the RPC-1000 communications web card.

Table 6.3 Common Issues and Corrective Actions for the RPC-1000 Communications Web Card

CONDITION PROBABLE CAUSE CORREC TIVEACTION

• Verify the LEDs on the RPC-1000 communications web card: A solid green (network connectivity)
and flashing amber (packet activity) are normal.

• Flashing green, or the absence of flashing amber, indicates intermittent connectivity or a bad
communications module.

• Reseat the communications module.

• Verify the network cable is good. Swap the non-functioning communications module with a known
working communications module. If a previously working communications module fails, replace
the cable and/or confirm a connection to the network switch.

• Verify the cable connections at the RPC-1000communications web card and the network switch.

• Verify network settings on RPC-1000 communications web card. For detailed steps, see the
Liebert® RPC™ Web Card User Manual, Section 4.0.

• Verify DNS Settings. For detailed steps, see the Liebert® RPC™ Web Card User Manual, Section

9.5.

• Verify the communications module duplex setting matches the network switch. See the Liebert®
RPC™ Web Card User Manual, Section 9.5.

• Verify the cable connections at the RPC-1000communications web card and the network switch.

• Verify the network cable is good per the “Unableto reach Web Interface” issue.

• Verify the LEDs on RPC-1000 communications web card per the “Unable to reach Web Interface”
issue.

Unable to reach the
web interface of the
RPC-1000
communications
web card. No LED
indicators are on
the RPC-1000
communications
web card.

Not Receiving
Parametric
Information.

• Bad network
cable.

• Communications
module not
properly seated.

• IP address has
changed.

• Incorrect
configuration.

• Card is in Null
State.

• Card was reset
to factory
default.

• Network
connectivity.

• SNMP not setup
correctly.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 4 2

CONDITION PROBABLE CAUSE CORREC TIVEACTION

• Verify the SNMP setup on the RPC-1000 communications web card. For detailed steps, see the
Liebert® RPC™ Web Card User Manual, Section 9.6.

• Verify the PDU setup in monitoring software with matching SNMP community strings.

• Reseat the card.

• Card is in a Null
State.

• Incorrect
configuration.

• Verify the network settings on the RPC-1000 communications web card. For detailed steps, see
the Liebert® RPC™ Web Card User Manual, Section 4.0.

• Verify the DNS settings. For details, see the Liebert® RPC™ Web Card User Manual, Section 9.5.

• Verify the communications module duplex setting matches the network switch. See the Liebert®
RPC™ Web Card User Manual, Section 9.5.

6.2.2 Array configurations

The following table lists array configuration issues that can occur with the communications module.

Table 6.4 Array Configuration Issues and Corrective Actions

CONDITION PROBABLE CAUSE CORREC TIVE ACTION

Sibling PDU is not
beingdisplayed the
in web interface.

Not receiving
parametric
information from
Sibling PDU.

• Bad network cable.

• PDU array is not setup correctly.

• Verify the network cable is good.

• Verify the cable is inserted in the correct port.

• Confirm the array setup. For detailes, see the Liebert® RPC™ Web Card
User Manual (SL-20825) or the Liebert® RPC2™ Communications Module
Installer/User Guide(590-1380-501A).

6.2.3 Restarting or resetting

Restarting the RPC2™ module can consist of a reboot of the system or a reset to factory defaults. To
highlight the difference, a reboot may be required after network or configuration changes. In contrast,
performing a reset to factory defaults reverts all configuration parameters to the original default state.
The module can be rebooted manually on the module through the MPH2 rack PDU's LCD or via the
module's reset button or web interface.

To manually reboot the module:

Press the r e s e t button once, holding it down for one second. After a short time, the network port status
lights turn off briefly, indicating the module is restarting.

To manually reset to factory defaults:

Press the R e s e t button five times, one second apart. After a short time, the network port status lights turn
off briefly, indicating the module is restarting.

NOTE: Use a paper clip to press the R e s e t button.

To reboot from the module's web interface:

1. From the side navigation tree of the S y ste m tab, click S e t tin g s .

2. Click the R e b oo t icon, then press O K to confirm the reboot.

NOTE: The Reboot icon appears on any System tab window where a reboot is required.

To reboot from the on-board LCD:

1. Use the arrow keys to highlight the Information icon and press the S ele c t key.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 4 3

2. Use an arrow key to highlight Re b oo t and press the S e lect key.

3. Use the arrow keys to highlight an up or down arrow on the bottom-left and press the S e lec t
key to highlight R e b oot.

4. Use the arrow keys to highlight the P la y button and press the Se lect key.

5. At the confirmation screen, use the arrow keys to highlight the up or down arrow, and press the
Sele ct key to highlight Yes/Reboot Now, then press the S ele c t key to reboot the system.

To reset to factory defaults from the on-board LCD:

NOTE: The LCD screen reset to factory default is only available for the MPH2 rack PDU. If you are
using an RPC2 installed in an MPH or MPX rack PDU, you can only perform a reset to factory defaults
using the recessed reset button on the module.

1. Use the arrow keys to highlight the Information icon and press the S ele c t key.

2. Use an arrow key to highlight the Reboot/Restore-Defaults icon and press the S e lect key.

3. Use the arrow keys to highlight an up or down arrow on the bottom-left and press the S e lec t
key to highlight Restore Defaults.

4. Use the arrow keys to highlight the Play button and press the S e lec t key.

5. At the confirmation screen, use the arrow keys to highlight the up or down arrow, and press the
Sele ct key to highlight Yes/Reboot to Default, then press the S e lect key to restore the system
default settings.

For additional information, see the Liebert® RPC™ Web Card User Manual (SL-20825). or the Liebert®
RPC2™ Communications Module Installer/User Guide (590-1380-501A).

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 44

APPENDICES

Appendix A: Agency Approvals

The MPXunits comply with the following North American and European standards.

A.1 North American units

The 120 V and 240 V single-phase and 120/208-240 V three-phase North American MPX™units have the
following agency approvals:

• UL 60950-1 Standard for Safety: Information Technology Equipment - Safety - Part 1: General
Requirements

• CSA C22.2 No. 60950-1: Information Technology Equipment - Safety, Part 1 General Equipment

- Safety - Part 1: Requirements

• FCC, Title 47, Part 15 Subpart B for Class A operation as defined by ANSI Standard C63.4.

• ISTA Procedure 1A and 2A

• RoHS Compliant

A.2 European units

The 230 V single-phase and 400 V three-phase European MPXunits have the following agency
approvals:

• CE Compliant according to:

• Low-Voltage Directive 2014/35/EU

• Electromagnetic - Compatibility Directive 2014/30/EU (EMD)

• RoHS Directive 2011/65/EC

• WEE Directive 2012/19/EU

• ISTA Procedure 1 A and 2A

• ROHS and WEEE Compliant, Basic Test for Purchased Products according to International
Safe Transit Association

A.1 Electrical and Environmental Specifications

SPEC IFIC ATION PARAMETER

Power Consumption

Maximum Ratings Maximum 240/415 V, 50/60 Hz, 63 A; dependent on MPXPEM selection

Insulation Class I, Basic Earthed SELV

Electric Strength 2200VDC

Overcurrent Protection UL489 Overcurrent Circuit Breaker per Branch, 20 A, 5000 A A.I.C

Operating Temperature Up to 140° F (60° C)

Humidity 5-95%, non-condensing

Altitude 6560ft (2000 m) without derating

Storage Temperature Range -13° F to 185° F (-25° C to 85° C)

22 W maximum per fully configured 42U model(RPC, RPC BDM, MPXPEM, 6xBRM-R): 3 W per
RPC; 0.4 W per module + 0.4 W per open control (energizedcondition)

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 4 5

A.2 Metering Performance

MEASUREMENT POWE R ENTRY MODULE (PEM)

Volts, V ±1

Accuracy, %

Phase Voltage, 0.1 V √ N/A √

LineVoltage, 0.1 V √ N/A N/A

LineCurrent, 0.01 A √ √ √

Neutral Current, 0.01 A √ (3-phase only) N/A N/A

Total Real Power, 0.1 W √ N/A N/A

Total Real Energy, 0.1 kW-hr √ N/A N/A

Real Power, 0.1 W N/A √ √

Apparent Power, 0.1 VA N/A √ √

Real Energy, 0.1 kW-hr N/A √ √

Power Factor, 0.01 N/A √ √

Crest Factor, 0.01 N/A N/A √

Frequency, 0.1 Hz √ N/A N/A

Current, A

BRANCH RECEPTAC LE MODUL E (BRM)

BRANCH REC EPTAC LE

±2%, from 1% to <10%Loading

±1%, from 10% to 125%Loading

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 4 6

Appendix B: Dimensional Drawings

Figure B.1 Liebert® MPX™ Rack PDU Assembly Dimensions, 74 in (1880 mm) Model

Figure B.2 Liebert MPX Rack PDUAssembly Dimensions, 40.6 in (1035 mm) Models

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 4 7

Figure B.3 RPC BDM Dimensions

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 4 8

Appendix C: Recycling, Compliance and Modifications Information

C.1 Notice to European Union Customers: Disposal of Old Appliances

This product has been supplied from an environmentally aware manufacturer that complies with the
Waste Electrical and Electronic Equipment (WEEE) Directive 2012/19/EU.

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 a specialized collection
and disposal center. If this unit must be dismantled, it must be done by a specialized center for collection
and disposal of electric and electronics appliances or other dangerous substances.

The following “crossed-out wheelie bin” symbol is placed on 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).

C.2 RoHS compliance

The Liebert® MPX™ rack PDUscomply with the Restriction of Hazardous Substances Directive (RoHS),
prohibiting the use of six hazardous materials used in the manufacturing of electronics, including lead­free solder.

C.3 FCC compliance

This equipment has been tested and found to comply with the limits for a Subpart B Class A digital device,
pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against
harmful interference.

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to part 15 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.

C.4 Modification disclaimer

Be aware that this product must be assembled and operated as stated in this document. Modifying the
Liebert MPX rack PDUor any module may void the user’s authority to operate the equipment.

Vertiv | Liebert® MPX™ Rack Power DistributionUnit Installer/User Guide | 4 9

VertivCo.com | Vertiv Headquarters, 1050 Dearborn Drive, Columbus, OH, 43085, USA

© 2017 Vertiv Co. Allrights reserved. Vertiv and the Vertivlogo are trademarks or registered trademarks of VertivCo. All other names and logos referred to
are trade names, trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and
completeness herein, Vertiv Co. assumes no responsibility, and disclaims allliability, for damages resulting from use of this information or for any errors or
omissions. Spec ifications are subject to change without notice.

SL-20820_REV4_4-17/590-1654-501A