Vertiv Netsure User manual

NetSure™
DC/DC Converter Module
User Manual (UM1C400483500e / 11XA9076RJ), Revision G
Specification Number: 1C400483500e
Model Number: C400/48-3500e

Vertiv |NetSure DC/DC Converter Module User Manual (1C400483500e / 11XA9076RJ)|Rev. G
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The information contained in this document is subject to change without
notice and may not be suitable for all applications. While every precaution
has been taken to ensure the accuracy and completeness of this
document, Vertiv Group Corporation assumes no responsibility and
disclaims all liability for damages resulting from use of this information or
for any errors or omissions. Refer to other local practices or building codes
as applicable for the correct methods, tools, and materials to be used in
performing procedures not specifically described in this document.
This document may contain confidential and/or proprietary information of
Vertiv Group Corporation, and its receipt or possession does not convey
any right to reproduce, disclose its contents, or to manufacture or sell
anything that it may describe. Reproduction, disclosure, or use without
specific authorization from Vertiv Group Corporation is strictly prohibited.
Vertiv and the Vertiv logo are trademarks or registered trademarks of
Vertiv Group Corporation. NetPerform™, NetReach™, NetSure™ and
NetXtend™ are trademarks of Vertiv Energy Systems, Inc. All other
trademarks are the property of their respective owners.
© 2017 Vertiv Energy Systems, Inc. All rights reserved.

Vertiv |NetSure DC/DC Converter Module User Manual (1C400483500e / 11XA9076RJ)|Rev. G
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TABLE OF CONTENTS
Admonishments Used in this Document............................................................4
Important Safety Instructions ..............................................................................5
General Safety ...........................................................................................................................................................5
Voltages...........................................................................................................................................................................5
DC Input Voltages........................................................................................................................................................ 5
DC Output and Battery Voltages .................................................................................................................. 5
Personal Protective Equipment (PPE)............................................................................................. 6
Hazardous Voltage.............................................................................................................................................. 6
Handling Equipment Containing Static Sensitive Components............................. 6
Static Warning...........................................................................................................7
Introduction ...............................................................................................................9
Overview.........................................................................................................................................................................9
Specifications ............................................................................................................................................................ 9
DC Output Ratings ......................................................................................................................................................9
DC Input Ratings ...........................................................................................................................................................9
Environmental Ratings ......................................................................................................................................... 10
Compliance Information........................................................................................................................................11
Standard Features ......................................................................................................................................................11
Mechanical Specifications................................................................................................................................. 14
Operation.................................................................................................................. 15
Local Indicators.....................................................................................................................................................15
Converter High Voltage Shutdown and Lockout Restart...........................................15
Installing Converter Modules...................................................................................................................16
Troubleshooting and Repair................................................................................ 18
Troubleshooting ...................................................................................................................................................18
Converter Current Sharing Imbalanced................................................................................................18
Converter Fault Symptoms and Troubleshooting......................................................................18
Replacement Procedures...........................................................................................................................20
Converter Module Replacement................................................................................................................ 20
Converter Fan Replacement............................................................................................................................21

Vertiv |NetSure DC/DC Converter Module User Manual (1C400483500e / 11XA9076RJ)|Rev. G
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ADMONISHMENTS USED IN THIS DOCUMENT
DANGER
! Warns of a hazard the reader will be exposed to that will likely result
in death or serious injury if not avoided. (ANSI, OSHA)
WARNING
! Warns of a potential hazard the reader may be exposed to that could
result in
death or serious injury if not avoide
d. This admonition is not used for situations that pose a
risk only to equipment, software, data, or service. (ANSI)
CAUTION
! Warns of a potential hazard the reader may be exposed to that could
result in minor or moderate injury if not avoided. (ANSI, OSHA) This admonition is not
used for situations that pose a risk only to equipment, data, or service, even if such use
appears to be permitted in some of the applicable standards. (OSHA)
ALERT
! Alerts the reader to an action that must be avoided in order to protect
equipment, software, data, or service. (ISO)
ALERT
! Alerts the reader to an action that must be performed in order to prevent
equipment damage, software corruption, data loss, o
r service interruption. (ISO)
FIRE SAFETY
! Informs the reader of fire safety information, reminders, precautions,
or policies, or of the locations of fire
-fighting and fire-safety equipment. (ISO)
SAFETY
! Informs the reader of general safety information, reminders, precautions, or
policies not related to a particular source of hazard or to fire safety. (ISO, ANSI, OSHA)

Vertiv |NetSure DC/DC Converter Module User Manual (1C400483500e / 11XA9076RJ)|Rev. G
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IMPORTANT SAFETY INSTRUCTIONS
General Safety
DANGER! YOU MUST FOLLOW APPROVED SAFETY PROCEDURES.
Performing the following procedures may expose you to hazards. These procedures should be
performed by qualified technicians familiar with the hazards associated with this type of equipment.
These hazards may include shock, energy, and/or burns. To avoid these hazards:
a) The tasks should be performed in the order indicated.
b) Remove watches, rings, and other metal objects.
c) Prior to contacting any uninsulated surface or termination, use a voltmeter to verify that no voltage
or the expected voltage is present. Check for voltage with both AC and DC voltmeters prior to
making contact.
d) Wear eye protection.
e) Use certified and well maintained insulated tools. Use double insulated tools appropriately rated for
the work to be performed.
f) For systems operating with 400 VDC power, do not work on an energized system without full arc
flash and PPE protection.
Voltages
DC Input Voltages
DANGER! This system operates from 400 VDC input voltage capable of producing fatal electrical
shock.
DC Output and Battery Voltages
DANGER! This system produces DC power and may have a battery source connected to it. Although
the DC voltage is not hazardously high, the converters and/or battery can deliver large amounts of
current. Exercise extreme caution not to inadvertently contact or have any tool inadvertently contact an
output terminal or battery terminal or exposed wire connected to an output terminal or battery terminal.
NEVER allow a metal object, such as a tool, to contact more than one termination or battery terminal at a
time, or to simultaneously contact a termination or battery terminal and a grounded object. Even a
momentary short circuit can cause sparking, explosion, and injury.

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Personal Protective Equipment (PPE)
DANGER! ARC FLASH AND SHOCK HAZARD.
Appropriate PPE and tools required when working on this equipment. An appropriate flash protection
boundary analysis should be done determine the “hazard/risk” category, and to select proper PPE.
This product is intended only for installation in a Restricted Access Location.
Only authorized and properly trained personnel should be allowed to install, inspect, operate, or maintain
the equipment.
Do not work on LIVE parts. If required to work or operate live parts, obtain appropriate Energized Work
Permits as required by the local authority, per NFPA 70E “Standard for Electrical Safety in the
Workplace”.
Hazardous Voltage
DANGER! HAZARD OF ELECTRICAL SHOCK.
More than one disconnect may be required to de-energize the system before servicing.
Handling Equipment Containing Static Sensitive Components
ALERT! Installation or removal of equipment containing static sensitive components requires careful
handling. Before handling any equipment containing static sensitive components, read and follow the
instructions contained on the Static Warning Page.

Vertiv |NetSure DC/DC Converter Module User Manual (1C400483500e / 11XA9076RJ)|Rev. G
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STATIC WARNING
This equipment contains static sensitive components. The warnings listed below must be observed to
prevent damage to these components. Disregarding any of these warnings may result in personal injury
or damage to the equipment.
1. Strictly adhere to the procedures provided in this document.
2. Before touching any equipment containing static sensitive components, discharge all static
electricity from yourself by wearing a wrist strap grounded through a one megohm resistor. Some
wrist straps have a built-in one megohm resistor; no external resistor is necessary. Read and follow
wrist strap manufacturer’s instructions outlining use of a specific wrist strap.
3. Do not touch traces or components on equipment containing static sensitive components. Handle
equipment containing static sensitive components only by the edges that do not have connector
pads.
4. After removing equipment containing static sensitive components, place the equipment only on
conductive or anti-static material such as conductive foam, conductive plastic, or aluminum foil. Do
not use ordinary Styrofoam™or ordinary plastic.
5. Store and ship equipment containing static sensitive components only in static shielding containers.
6. If necessary to repair equipment containing static sensitive components, wear an appropriately
grounded wrist strap, work on a conductive surface, use a grounded soldering iron, and use
grounded test equipment.

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INTRODUCTION
Overview
The C400/48-3500e is a compact DC/DC converter which offers efficient power conversion. It operates from a
nominal +400Vdc source to provide nominal -48Vdc load power.
Specifications
DC Output Ratings
•Voltage: Nominal -48 volts DC, positive ground. Output voltage is adjustable from -42 to -58 volts DC
via the associated controller.
•Nameplate Rating: -48 to -58Vdc, 3500W.
•Regulation:
a) Output Voltage Tolerance: < ±0.6% when the load is 5%-100% and the temperature is 25°C.
b) Dynamic Response: The dynamic response time at rated input and output voltage is ≤ 200us and
overshot ≤ 5% for load changes at 50%-25%-50% and 50%-75%-50%.
c) The output voltage is accurate at half load. At half load, the error of output voltage is ≤ ±100mV.
Static regulation will give other voltage depending on load. The default value at half load is 53.5V.
•Filtering:
a) Wideband noise is <20mV between 25Hz-20kHz.
b) Peak-peak voltage is ≤ 250mV at 0-100MHz and normal output voltage.
c) Psophemetic noise voltage is ≤ 2mVat 300-3400Hz.
d) Wideband noise voltages are ≤ 50mV at 3.4 kHz-150 kHz and ≤ 20mV at 0.15MHZ-30MHz.
e) Discrete noise voltages are ≤ 5mV at 3.4-150 KHz, ≤ 3mV at 150-200 KHz, ≤ 2mV at 200-500KHz,
and ≤ 1mV at 500-30000 KHz.
•Output over Current Protection: The converter has an appropriate fuse in the negative output.
DC Input Ratings
•Rated Input Voltage Range: 260Vdc to 400Vdc.
•Inrush Current: The peak value of the inrush current does not exceed 1.5 times the rated input steady-
state peak value.
•Static Line Regulation: ≤ ±0.1% over the operating nominal input voltage range at nominal frequency.
Output voltage static regulation with temperature variation meets the temperature coefficient.
•Temperature Coefficient: ≤ ±0.02%/°C over the specified operating temperature range.
•Input Voltage Protection: The converter will shut down at low or high voltage input. Refer to the
following:
a) Low Voltage Disable Point: 255Vdc±5Vdc; hysteretic at least 15Vdc for restart.

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b) High Voltage Disable Point: 405Vdc±5Vdc; hysteretic at least 10Vdc for restart.
•Typical Input Data: When equipped with one DC-DC converter.
a) See Table 1.
b) Maximum Input Current: 14.6Adc maximum @ 260Vdc input voltage, 3500 Watt output.
c) Efficiency: The efficiency is 96.5% at 30%-70% load when the input voltage is 380V and output
voltage is 54V.
Table 1: Typical Input Data
Input
Voltage
Percent
of Full Load
Input Current
(Amps)
Efficiency
(%)
Typical Heat
Dissipation
(BTU/Hr)
380 VDC
10
0.92
92.53
82.9
20
1.84
95.85
95.38
30
2.76
96.86
109.17
40
3.72
96.92
143.77
50
4.68
96.87
183.45
60
5.60
97.10
204.16
70
6.56
96.83
260.9
80
7.52
96.71
310.15
90
8.48
96.55
366.16
100
9.48
96.18
450.03
NOTE! The output voltage of the DC-DC converter is initially adjusted to 48 volts DC at 50% load and
380 volts DC input.
Environmental Ratings
•Operation Temperature Range: -40°C to +75°C (-40°F to +167°F), -20°C to +45°C (-4°F to +113°F) with
full performance.
•Storage Ambient Temperature Range: -40°C to +70°C (-40°F to +158°F).
•Humidity: This converter is capable of operating in an ambient relative humidity range of 0 to 95%, non-
condensing.
•Altitude: The maximum operating ambient temperature should be derated by 3°C per 1000 feet at an
elevation of 6,000 feet.
•Ventilation Requirements: The converter is fan cooled and utilizes front to back forced ventilation.
•Audible Noise: With a single converter installed and operating, the audible noise measured in front of
converter at a 0.6m distance from a horizontal line from the middle of converter does not exceed 50
dBA with a temperature of 25°C.
•Over Voltage Category: II.
•Power Distribution System: TN/TT/IT.