Vertiv Net Sure SM-DU+ User manual

NetSure™
Supervision Module for Distribution Unit Plus
Installation and User Manual (UM10010507), Revision A
Specification Number: 10010507
Model Number: SM-DU+ with Enclosure

Vertiv |NetSure™ Site Monitoring Unit Installation & User Manual (UM10010507)|Rev. A
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Vertiv Group Corp., 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 Corp. is strictly prohibited.
© 2020 Vertiv Group Corp. All rights reserved. Vertiv™ and the Vertiv
logo are trademarks or registered trademarks of Vertiv Group Corp. 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 Group
Corp. assumes no responsibility, and disclaims all liability, for damages
resulting from use of this information or for any errors or omissions.
Specifications are subject to change without notice.

Vertiv |NetSure™ Site Monitoring Unit Installation & User Manual (UM10010507)|Rev. A
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TABLE OF CONTENTS
Admonishments Used in this Document............................................................4
Important Safety Instructions ..............................................................................5
Safety Admonishments Definitions......................................................................................................5
General Safety ...........................................................................................................................................................5
Handling Equipment Containing Static Sensitive Components..............................5
Static Warning...........................................................................................................6
Introduction ...............................................................................................................7
Overview..........................................................................................................................................................................7
Technical Specifications .................................................................................................................................7
Switch Settings.........................................................................................................9
General.............................................................................................................................................................................9
Installation................................................................................................................ 12
Mounting...................................................................................................................................................................... 12
Electrical Connections .......................................................................................... 12
Important Safety Instructions ................................................................................................................. 12
Wiring Considerations..................................................................................................................................... 12
Frame Grounding Connection................................................................................................................ 12
Load Shunt Input Connections..............................................................................................................13
Fuse Alarm (FA) Input Connections................................................................................................. 13
Input Power Connections............................................................................................................................14
NCU CAN Bus Connections......................................................................................................................15
Operation.................................................................................................................. 17
Indicators ..................................................................................................................................................................... 17
Configuring the NCU SM-DU+ Parameters.............................................................................. 17

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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 avoided. 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, or 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)

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IMPORTANT SAFETY INSTRUCTIONS
Safety Admonishments Definitions
Definitions of the safety admonishments used in this document are listed under “Admonishments Used in this
Document” on page 4.
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.
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.

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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
static dissipative surfaces such as conductive foam or ESD bag. 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
This assembly consists of an SM-DU+ enclosed in a sheet metal housing. This assembly is used in applications
where an SM-DU+ is mounted external to a power system equipped with an NCU controller. The SM-DU+
assembly is used to connect load shunts and fuse alarm signals to the NCU controller. The SM-DU+ assembly
provides twenty-five (25) load shunt monitoring inputs and fourteen (14) fuse alarm monitoring inputs.
The SM-DU+ assembly connects into the NCU CAN bus. Up to eight (8) SM-DU+ assemblies can be
connected to an NCU. Refer to Figure 1for an illustration of the SM-DU+ assembly.
Figure 1: SM-DU+ Assembly
Technical Specifications
See Table 1.
Table 1: Technical Specifications
Item Description
Operating Voltage
Nominal: -48 VDC.
Input Voltage Range: -19 VDC to -60 VDC.
Operating
Temperature Range
Normal Operation Temperature Range: -10°C to +65°C.
Non Destructive Range: -40°C to +75°C.
Communication
CAN Bus
Input Signals
Fourteen (14) Fuse Alarm (Bus- base of 0 VDC, >10 VDC alarm, <10 VDC normal).
Twenty-Five (25) Load Shunts (25 mV DC to 75 mV DC Shunt)
Dimensions
See Figure 2.
SM-DU+ Assembly

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Figure 2: Dimensions
10.00
4.76
9.43
3.86
Diameter 0.14” (4-places)
2.57
Notes:
1. All dimensions are in inches,
unless otherwise specified.
Front
Bottom
Top
Left Side Right Side

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SWITCH SETTINGS
General
The SM-DU+ assembly uses two (2) 8-bit switches for parameter settings (SW1 and SW2). Refer to Figure 3for
SW1 and SW2 locations. Refer to Table 2for SW1 and SW2 settings.
Perform the following procedure to make switch setting adjustments.
Procedure
1. Remove the top cover to access the switches.
2. Set SW1 and SW2 per site requirements. Refer to Figure 3for location. See Table 2for setting
descriptions.(Set the addressing switches on each SM-DU+ assembly installed in the system to a
unique address per Table 2.)
Figure 3: SM-DU+ Assembly Switch Locations
Switch SW2
Switch SW1
SW1
SW2
on
56
78 12
34
off
on
5678 1234
off
PowerCANRS485RS485
RS232
SW1SW2
J1
J7
ShuntShunt
J8J6
Fuse
J3
J4J4A
J5
ON
OFF
Green Indicator
8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1
SM-DU+ Circuit Board

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Table 2: SM-DU+ Switch Settings (cont’d on next page)
DIP Switch SW1
Reserved HW
/SW
Shunt
Voltage
Shunt
Current Description of Status
1 2 3 4 5 6 7 8
NA
OFF
NA
Shunt parameter is set through DIP switch.
ON
Shunt parameter is set through software (note 1).
NA
OFF
OFF
NA
Shunt Voltage: 25mV (note 1)
OFF
ON
Shunt Voltage: 50mV
ON OFF Shunt Voltage: 60mV
ON
ON
Shunt Voltage: 75mV
NA
OFF
OFF
OFF
Shunt Current: 500 A (note 1)
OFF
OFF
ON
Shunt Current: 100 A
OFF
ON
OFF
Shunt Current: 200 A
OFF
ON
ON
Shunt Current: 300 A
ON
OFF
OFF
Shunt Current: 400 A
ON
OFF
ON
Shunt Current: 1000 A
ON
ON
OFF
Shunt Current: 1500 A
ON
ON
ON
Shunt Current: 2000 A
Note 1: Default Setting

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Table 2: SM-DU+ Switch Settings (cont’d from previous page)
DIP Switch SW2
Reserved Communications
Address
Baud
Rate Description of Status
1 2 3 4 5 6 7 8
NA
OFF
OFF
OFF
NA
Address 1# (Setting for 1st SM-DU+ in System)
OFF
OFF
ON
Address 2# (Setting for 2nd SM-DU+ in System)
OFF
ON
OFF
Address 3# (Setting for 3rd SM-DU+ in System)
OFF
ON
ON
Address 4# (Setting for 4th SM-DU+ in System)
ON
OFF
OFF
Address 5# (Setting for 5th SM-DU+ in System)
ON
OFF
ON
Address 6# (Setting for 6th SM-DU+ in System)
ON
ON
OFF
Address 7# (Setting for 7th SM-DU+ in System)
ON
ON
ON
Address 8# (Setting for 8th SM-DU+ in System)
NA
OFF
19200 (note 1)
ON
9600
Note 1: Default Setting

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INSTALLATION
Mounting
The SM-DU+ assembly provides mounting holes in each corner. Refer to Figure 2for location and dimensions.
ELECTRICAL CONNECTIONS
Important Safety Instructions
DANGER! Adhere to the “Important Safety Instructions” starting on page 5.
Wiring Considerations
All wiring should follow the current edition of the American National Standards Institute (ANSI) approved
National Fire Protection Association's (NFPA) National Electrical Code (NEC), and applicable local codes. For
operation in countries where the NEC is not recognized, follow applicable codes.
Frame Grounding Connection
A frame ground stud (M3) is located on the outside of the SM-DU+ assembly.
Procedure
1. Connect a frame ground lead to the frame ground stud located on the SM-DU+ assembly.Refer to
Figure 4for location.Recommended torque is 6 in-lbs.
Figure 4: SM-DU+ Assembly Frame Grounding Connection
SM-DU+ Assembly Top View
Frame Ground
(Torque to 6 in-lbs.)

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Load Shunt Input Connections
The SM-DU+ assembly provides connections for up to twenty-five (25) load shunt inputs.
See also “Switch Settings” on page 9.
Procedure
1. Connect up to twenty-five (25) load shunt inputs to the SM-DU+ assembly. Observe proper polarity.
Refer to Figure 5and the label on the SM-DU+ assembly for connection point identification.
NOTE! The shunt needs to be installed in the hot (-48V) bus. Connect the plus side of the shunt to the
positive shunt input on the SM-DU+ assembly. Connect the negative side of the shunt to the negative
shunt input on the SM-DU+ assembly.
Fuse Alarm (FA) Input Connections
The SM-DU+ assembly provides connections for up to fourteen (14) fuse alarm (FA) inputs.
Procedure
1. Connect up to fourteen (14) fuse alarm (FA) inputs to the SM-DU+ assembly. Refer to Figure 5and the
label on the SM-DU+ assembly for connection point identification.
Figure 5: SM-DU+ Assembly Shunt and Fuse Alarm (FA) Inputs Connections
Terminal Blocks
Wire Size Capacity: 16-26 AWG.
Recommended Torque: 2.2 in-lbs.
SM-DU+ Assembly Top View
FUSE ALARM
INPUTS
SHUNT
INPUTS
(+Shunt)
(-Shunt)

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Input Power Connections
Input power must be supplied to each SM-DU+ assembly installed in the system. Refer to Figure 6for input
power connection location.
Procedure
1. Connect the spade lug end of cable P/N 557012 provided to the appropriate terminals located on the
SM-DU+ assembly (see Figure 6.). Red to a -48V terminal, Black to a RTN terminal.
2. Route this cable to the input power source. Cut this cable to length and terminate it with the supplied
spade lugs. Connect Red to the -48V power source terminal. Connect Black to a RTN power source
terminal.
Figure 6: SM-DU+ Assembly Input Power Connections
Screw: #6-32 Philslot
Recommended Lug: #6 Spade
Distance between Barriers: 0.30”
Torque: 9.0 in-lbs.
Use cable P/N 557012 to connect -48V and RTN
to the SM-DU+ Assembly.
-48V: Red Wire
RTN: Black Wire
-48V: Red Wire RTN: Black Wire
SM-DU+ Assembly Top View
P/N 557012 Cable Assembly (provided)

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NCU CAN Bus Connections
Refer to Figure 7.
Procedure (Connecting First SM-DU+ Assembly to NCU)
1. Connect the SM-DU+ assembly into the NCU CAN Bus. Connect CAN_H to CAN_H. Connect CAN_L to
CAN_L. Refer to the system documentation for NCU CAN port description and location. Cable P/N
562868 provided. Refer to Table 3for cable information. Refer to Figure 7for an interconnect diagram.
Table 3: CAN Bus Cable P/N 562868
Connector Pin No. Color Signal Symbol
RJ-45
1
W/O
CAN_L
2
O
CAN_H
Procedure (Connecting Multiple SM-DU+ Assemblies Together)
NOTE! The NCU can communicate with up to eight (8) SM-DU+ assemblies.Set each SM-DU+
assembly to a unique address number.
1. To connect multiple SM-DU+ assemblies together, for all assemblies connect the CAN_H terminals
together and connect the CAN_L terminals together (CAN_H to CAN_H, CAN_L to CAN_L). See Figure
7for an interconnect diagram.
2. Connect a termination resistor such as P/N 561768 to the last SM-DU+ assembly in the NCU CAN bus.
Connect to CAN_H and CAN_L terminals along with the CAN_H and CAN_L leads factory connected to
the terminal block. See Figure 7.

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Figure 7: SM-DU+ Assembly CAN Bus Connections
To power system’s
CAN L Terminal.
To power system’s
CAN H Terminal.
Screw: #6-32 Philslot
Recommended Lug: #6 Spade
Distance between Barriers: 0.30”
Torque: 9.0 in-lbs.
SM-DU+ Assembly Top View
SM-DU+ Assembly Top View
SM-DU+ Assembly Top View
Remove the termination
resistor from power system
CAN bus terminal block and
place it here (or use P/N
561768 termination resistor).
Cable P/N 562868 provided.
Twisted Wire Pair
CAN_H to CAN_H
CAN_L to CAN_L
Twisted Wire Pair
CAN_H to CAN_H
CAN_L to CAN_L

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OPERATION
The SM-DU+ assembly monitors load shunt inputs and fuse alarm inputs and reports this data to the NCU
controller.
Indicators
There is one (1) status and alarm indicator located on the SM-DU+ circuit card. The function of this indicator is
as shown in Table 4. Refer to Figure 8for location.
Table 4: SM-DU+ Circuit Card Indicator
Indicator Normal State Fault State Fault Cause
Operation
(Green) On
Off SM-DU+ is non-operational.
Flashing
A 1/3Hz flashing indicates the
SM-DU+ is being identified by the
Controller.
A 1Hz flashing indicates a
communication failure.
Figure 8: SM-DU+ Circuit Card Indicator Location
Configuring the NCU SM-DU+ Parameters
Refer to the NCU controller manual (UM1M830BNA) for detailed instructions on how to program the monitored
inputs to the SM-DU+ assembly.
Green Indicator

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