Emerson NetSure 211 C45 User manual

NetSure 211 C45 Embedded Power
Supply System
User Manual
Version V1.0
Revision date September 15, 2009
BOM 31012178
Emerson Network Power provides customers with
technical support. Users may contact the nearest
Emerson local sales office or service center.
Copyright © 2009 by Emerson Network Power
Co., Ltd.
All rights reserved. The contents in this document
are subject to change without notice.
Emerson Network Power Co., Ltd.
Address: No.1 Kefa Rd., Science & Industry Park,
Nanshan District 518057, Shenzhen China
Homepage: www.emersonnetworkpower.com.cn
E-mail: [e-mail]

Safety Precautions
To reduce the chance of accident, please read the safety precautions very carefully before operation. The
"Caution, Note, Warning, Danger" in this book and on the product do not represent all the safety points to be
observed, and are only supplement to various safety points. Therefore, the installation and operation personnel
must receive strict training and master the correct operations and all the safety points before operation.
When operating Emerson products, the operation personnel must observe the safety rules in the industry, the
general safety points and special safety instructions specified in this book.
Electrical Safety
I. Hazardous voltage
Danger
Danger
Some components of the power supply system carry hazardous voltage in operation. Direct contact or indirect contact
through moist objects with these components will result in fatal injury.
Observe safety rules in the industry when installing the power supply system. The installation personnel must be
licensed to operate high voltage and AC power.
In operation, the installation personnel are not allowed to wear conductive objects, such as watches, bracelets,
bangles and rings.
When you spot the cabinet with water or moisture, turn off the power immediately. In moist environment,
precautions must be taken to keep moisture out of the power supply system.
"Prohibit" warning label must be attached to the switches and buttons that are not permitted to operate during
installation.
Danger
Danger
High voltage operation may cause fire and electric shock. The connection and wiring of AC cables must be in compliance
with the local rules and regulations. Only those who are licensed to operate high voltage and AC power can perform high
voltage operations.
II. Tools
Warning
In high voltage and AC operation, specialized tools must be used.
III. Thunderstorm
Danger
Danger
Never operate on high voltage, AC, iron tower or mast in the thunderstorm.
In thunderstorms, a strong electromagnetic field will be generated in the air. Therefore the equipment should be
well earthed in time to avoid damage by lightning strikes.

IV. ESD
Note
The static electricity generated by the human body will damage the static sensitive elements on PCBs, such as large-scale
ICs. Before touching any plug-in board, PCB or IC chip, ESD wrist strap must be worn to prevent body static from
damaging the sensitive components. The other end of the ESD wrist strap must be well earthed.
V. Short circuit
Danger
Danger
During operation, never short the positive and negative poles of the DC distribution unit of the power supply system or the
non-grounding pole and the earth. The power supply system is a constant-voltage DC power device, short circuit will result
in equipment burning and endanger human safety.
Check the polarity of the cable and connection terminal when performing DC live operations.
As the operation space in the DC distribution unit is very tight, please carefully select the operation space.
Never wear a watch, bracelet, bangle, ring, or other conductive objects during operation.
Use insulated tools.
In live operation, keep the arm, wrist and hand tense, so that when the tool in operation slips, the movement of
the human body and tool is reduced to a minimum.
BLVD
The power supply system has battery low voltage disconnection (BLVD) function. BLVD means when battery
voltage drops down to 43.2V, the power supply system cuts the load off to prevent over-discharge.
BLVD is enabled before delivery, which means that if power outage lasts for a long time or the power supply
system fails, there might be BLVD. Users should classify the loads and connect the priority loads to BLVD routes.
For vital loads, users can disable BLVD to ensure reliability of the power supply.
The method of disabling BLVD is:
Set ‘BLVD disabled’parameter through the monitoring module main menu Settings (password: 1) LVD
BLVD.
Warning
Notice
Note
The advantage of BLVD is protecting the batteries from over-discharge. The disadvantage of BLVD is that when the
battery voltage drops down to a certain value, all the loads (including non-priority loads and priority loads) will be cut off
due to battery disconnection.
The advantage of disabling BLVD is prolonging the power supply of priority loads. The disadvantage is that disabling
cannot prevent unwanted power failure due to misoperation or power supply system failure.

Others
I. Safety
Warning
Notice
Note
When replacing power input fuses of monitoring module and power distribution units, use the same type fuses to meet the
safety requirement.
II. Sharp object
Warning
When moving equipment by hand, wear protective gloves to avoid injury by sharp object.
III. Power cable
Warning
Notice
Note
Please verify the cable labels before connection.
IV. Signal cables
Warning
Notice
Note
The signal cables should be routed at least 150mm away from power cables.

Contents
Chapter 1 Overview ............................................................................................................................................................1
1.1 Model Description.................................................................................................................................................1
1.2 Composition And Configuration ............................................................................................................................1
1.3 Features................................................................................................................................................................2
Chapter 2 Installation Instruction.........................................................................................................................................3
2.1 Safety Regulations................................................................................................................................................3
2.2 Preparation...........................................................................................................................................................3
2.3 Mechanical Installation..........................................................................................................................................5
2.4 Electrical Installation.............................................................................................................................................7
2.4.1 Connecting Power Cables.........................................................................................................................7
2.4.2 Connecting Signal Cables .........................................................................................................................8
Chapter 3 Installation Testing............................................................................................................................................11
3.1 Installation Check And Startup............................................................................................................................11
3.2 Basic Settings.....................................................................................................................................................12
3.3 Alarm Check And System Operation Status Check............................................................................................12
3.4 Final Steps..........................................................................................................................................................13
Chapter 4 Alarm Handling.................................................................................................................................................14
4.1 Handling Alarms..................................................................................................................................................14
4.2 Handling Rectifier Fault.......................................................................................................................................15
Appendix 1 Technical Data ...............................................................................................................................................18
Appendix 2 Wiring Diagram...............................................................................................................................................20
Appendix 3 Glossary.........................................................................................................................................................22

Chapter 1 Overview 1
NetSure 211 C45 Embedded Power Supply System User Manual
Chapter 1 Overview
This chapter introduces model description, composition and configuration, and features of NetSure 211 C45
embedded power supply system (abbreviated as ‘system’hereinafter).
1.1 Model Description
The model description of the system is given in Figure 1-1.
NetSure 211 C 4
Region: China
Type of the rectifier: R48-1000
Brand name of the system
5
Version No.
The number of the rectifier in the typical power supply system: 4
S1
Configuration
-
Figure 1-1 Model description
1.2 Composition And Configuration
NetSure 211 C45 power supply system has two models, NetSure 211 C45-S1 and NetSure 211 C45-S2. The
appearances of the two systems are shown in Figure 1-2 and Figure 1-3.
Rectifier Monitoring module Load MCB Load socket
Battery MCB
Battery socket
Dry contact and temperature
probe connection terminal
Figure 1-2 Appearance of NetSure 211 C45-S1 power supply system
Rectifier Monitoring module Load MCB Battery MCB
Figure 1-3 Appearance of NetSure 211 C45-S2 power supply system

2 Chapter 1 Overview
NetSure 211 C45 Embedded Power Supply System User Manual
The configuration of the system is listed in Table 1-1.
Table 1-1 Configuration of the system
Component
Configuration
NetSure 211 C45-S1
NetSure 211 C45-S2
Rectifier
Model: R48-1000
Standard configuration: 4 pieces
Monitoring module
Model: M522B, M523B or M221B
Standard configuration: 1 piece
AC power distribution
AC input mode:
L + N + PE/220V, no AC input MCB
AC input mode:
L + N + PE/220V, 1 × 40A/2P MCB
DC power distribution
8 load MCBs:
4 × 20A/1P, 4 × 25A/1P
4 load MCBs:
2 × 20A/1P, 2 × 10A/1P
Battery routes
2 battery MCBs:
2 × 63A/1P
1 battery MCB:
1 × 63A/1P
Others
Two digital input ports, two dry contact output
ports, two temperature sensor ports
One digital input port, two dry contact output
ports, two temperature sensor ports
The monitoring module is available in three different models. Their configurations are listed in Table 1-2.
Table 1-2 Configuration of the monitoring module
Models
Configuration
M522B
2DI + 2DO, LCD display, network port, RS232 port
M523B
2DI + 2DO, LCD display, RS232 port
M221B
2DI + 2DO, no LCD display, three LED indicators indicating operation status of the system, RS232 port
1.3 Features
The rectifier uses the active Power Factor Compensation (PFC) technology, raising the power factor to 0.99.
The system has wide AC input voltage range: 90Vac ~ 290Vac.
The rectifier uses soft switching technology, raising the efficiency to 91%.
The rectifier has ultra-low radiation. With advanced EMC design, the rectifier meets international standards such
as CE, NEBS and YD/T983. Both the conducted and radiated interference reach Class B.
The rectifier safety design complies with UL, CE and NEBS standards.
The rectifier is of high power density.
The rectifier is hot pluggable. It takes less than 1min to replace a rectifier.
The rectifier has two over-voltage protection methods: hardware protection and software protection. The latter
one also has two optional modes: lock-out at the first over-voltage and lock-out at the second over-voltage.
The monitoring module has perfect battery management. The management functions include battery low voltage
disconnection (BLVD), temperature compensation, auto voltage regulation, stepless current limiting, battery
capacity calculation, on-line battery test, and so on.
The monitoring module can save up to 200 pieces of historical alarm records, and 10 sets of battery test data
records.
The monitoring module is of network design. With an RS232 port, Ethernet, dry contacts and other
communication ports provided, flexible networking is enabled to achieve remote monitoring and unattendance.
The system has complete fault protection and fault alarm functions.

Chapter 2 Installation Instruction 3
NetSure 211 C45 Embedded Power Supply System User Manual
Chapter 2 Installation Instruction
This chapter introduces installation and cable connection. Before installation, please read through safety regulations,
and then follow the instructions provided in this chapter to carry out the installation and cable connection.
2.1 Safety Regulations
Certain components in this system carry hazardous voltage and current. Always follow the instructions below:
1. Only the adequately trained personnel with satisfactory knowledge of the power system can carry out the
installation. The most recent revision of these safety rules and local safety rules in force shall be adhered to during
the installation.
2. All external circuits that are below -48V and connected to the power system must comply with the requirements of
SELV as defined in IEC 60950.
3. Make sure that the power (mains and battery) to the system is cut off before any operations can be carried out
within the system cabinet.
4. The power cabinets shall be kept locked and placed in a locked room. The key keeper should be the one
responsible for the system.
5. The wiring of the power distribution cables should be arranged carefully so that the cables are kept away from the
maintenance personnel.
2.2 Preparation
Unpacking inspection
The equipment should be unpacked and inspected after it arrives at the installation site. The inspection shall be done
by representatives of both the user and Emerson Network Power Co., Ltd.
To inspect the equipment, you should open the packing case, take out the packing list and check against the packing
list that the equipment is correct and complete. Make sure that the equipment is delivered intact.
Cables
The cable should be selected in accordance with relevant industry standards.
1. Cable specifications of NetSure 211 C45-S1 power supply system
It is recommended to use the RVVZ cables as AC cables. The cable should reach at least +70°C temperature
durability. Select the AC cable Cross-Sectional Area (CSA) according to Table 2-1.
Table 2-1 AC cable CSA selection
Connector
AC cable CSA
AC connection block
1.5mm2(AWG14) ~ 2.5mm2(AWG12)
The CSA of DC cable depends on the current flowing through the cable, the allowable voltage drop and load peak
current. The recommended load peak current is 1/2 to 2/3 of MCB or fuse capacity.
Select the battery cable CSA according to Table 2-2. Select the load cable CSA according to Table 2-3.
Table 2-2 Battery cable CSA selection
Battery MCB
rated current
Max. battery
current
Min. cable
CSA
Max. cable length (allowable
voltage drop: 0.5V)
Max. cable
CSA
Max. cable length (volt
drop: 0.5V, with max. CSA)
63A
60A
2.5mm2× 2
2.5m
4mm2× 2
4m
AWG12 × 2
3.8m
AWG10 × 2
4.8m
Note:
1. The specs are applicable at ambient temperature of 25°C.
2. The battery cable should reach at least +90°C heat durability. It is recommended to use double-insulated copper-core
flame-retardant cable as battery cable

4 Chapter 2 Installation Instruction
NetSure 211 C45 Embedded Power Supply System User Manual
Table 2-3 Load cable CSA selection
Load route rated
current
Max. output
current
Min. cable
CSA
Max. cable length (volt
drop: 0.5V, with min. CSA)
Max. cable CSA
Max. cable length (volt drop:
0.5V, with max. CSA)
20A
20A
2.5mm2
3.1m
4mm2
5m
AWG12
4.6m
AWG10
6.1m
25A
25A
2.5mm2
2.5m
2.5mm2
4m
AWG12
3.6m
AWG10
4.8m
Note:
1. The specs are applicable at ambient temperature of 25°C.
2. The battery cable should reach at least +90°C heat durability. It is recommended to use double-insulated copper-core
flame-retardant cable as battery cable
The CSA of the system earth cable should be the same as that of the largest power distribution cable and not less
than 1.5mm2. The earth terminal is one M5 bolt.
2. Cable specifications of NetSure 211 C45-S2 power supply system
It is recommended to use the RVVZ cables as AC cables. The cable should reach at least +70°C temperature
durability. Select the AC cable Cross-Sectional Area (CSA) according to Table 2-4.
Table 2-4 AC cable CSA selection
Connector
AC cable CSA
AC input MCB
4mm2(AWG10) ~ 10mm2(AWG6)
The CSA of DC cable depends on the current flowing through the cable, the allowable voltage drop and load peak
current. The recommended load peak current is 1/2 to 2/3 of MCB or fuse capacity.
Select the battery cable CSA according to Table 2-5. Select the load cable CSA according to Table 2-6.
Table 2-5 Battery cable CSA selection
Battery MCB
rated current
Max. battery
current
Min. cable
CSA
Max. cable length (allowable
voltage drop: 0.5V)
Max. cable
CSA
Max. cable length (volt
drop: 0.5V, with max. CSA)
63A
60A
10mm2
4.3m
16mm2
6.9m
AWG6
5.6m
AWG4
8.9m
Note:
1. The specs are applicable at ambient temperature of 25°C.
2. The battery cable should reach at least +90°C heat durability. It is recommended to use double-insulated copper-core
flame-retardant cable as battery cable
Table 2-6 Load cable CSA selection
Load route rated
current
Max. output
current
Min. cable
CSA
Max. cable length (volt
drop: 0.5V, with min. CSA)
Max. cable CSA
Max. cable length (volt drop:
0.5V, with max. CSA)
20A
20A
2.5mm2
3.1m
6mm2
7.5m
AWG12
4.6m
AWG8
10.7m
10A
10A
1.5mm2
3.7m
6mm2
15.1m
AWG14
5.8m
AWG8
21.4m
Note:
1. The specs are applicable at ambient temperature of 25°C.
2. The battery cable should reach at least +90°C heat durability. It is recommended to use double-insulated copper-core
flame-retardant cable as battery cable
The CSA of the system earth cable should be the same as that of the largest power distribution cable and not less
than 1.5mm2. The earth terminal is one M5 bolt.

Chapter 2 Installation Instruction 5
NetSure 211 C45 Embedded Power Supply System User Manual
The specifications of RS232 cable of the two systems are the same. The RS232 cable is shown in Figure 2-1.
DB9
X1 RJ45
X2
A
A amplified view
Figure 2-1 RS232 cable
The definition of the RS232 cable connector is shown in Table 2-7. Users should make RS232 cable according to the
description in Table 2-7.
Table 2-7 Definition of the RS232 cable connector
DB9
RJ45
X1.2
X2.3
X1.3
X2.6
X1.4
X2.7
X1.5
X2.4 & X2.5
X1.6
X2.2
X1.7
X2.8
X1.8
X2.1
2.3 Mechanical Installation
1. Install brackets.
Fix the brackets on the power supply subrack with bolts. Users can choose proper installation position according to
actual instance.
2. Install the power supply subrack.
Fix the subrack in the cabinet with fixing screws. The installation dimensions are shown in Figure 2-2 and Figure 2-3.

6 Chapter 2 Installation Instruction
NetSure 211 C45 Embedded Power Supply System User Manual
88.00 76.20 289.80
465.00
482.00
Figure 2-2 Installation dimensions of NetSure 211 C45-S1 power supply system (unit: mm)
88.00
465.00
482.00
76.20 289.8
Figure 2-3 Installation dimensions of NetSure 211 C45-S2 power supply system (unit: mm)

Chapter 2 Installation Instruction 7
NetSure 211 C45 Embedded Power Supply System User Manual
2.4 Electrical Installation
2.4.1 Connecting Power Cables
Danger
Danger
1. Switch off all MCBs and fuses before the electrical connection.
2. Only the qualified personnel shall do the power cable connection.
3. The batteries may have dangerous current. Before connecting battery cables, make sure that the battery fuses at the system side
and the battery MCBs at the battery side are switched off. If there are no battery MCBs at the battery side, you should disconnect
any one of the connectors between battery cells to avoid live state of the system after installation.
4. Be careful not to reversely connect the battery. Otherwise, both the battery and the system will be damaged!
1. Cable connection of NetSure 211 C45-S1 power supply system
Before connecting AC input cables, remove the back cover of the system, as shown in Figure 2-4.
AC cable entry hole
Back cover
Figure 2-4 Back view of the system
The positions of the connection terminals are shown in Figure 2-5 and Figure 2-6.
Load socket
Battery socket
Dry contact and temperature
probe connection terminal
Figure 2-5 Connection terminals (front view)
AC input socket of
upper layer rectifierEarth terminal
AC input socket of
lower layer rectifier
Figure 2-6 Connection terminals (back view, back cover removed)

8 Chapter 2 Installation Instruction
NetSure 211 C45 Embedded Power Supply System User Manual
Refer to Table 2-8 to connect the input and output cables.
Table 2-8 Connection descriptions of input and output cables
Cable
Connection
From
To
AC input cable
AC power
AC input socket
DC output cable
Load socket
Load
Battery cable
Battery string
Battery socket
Lead the AC input cables through the AC cable entry hole, and reinstall the back cover.
1. Cable connection of NetSure 211 C45-S2 power supply system
The positions of the connection terminals are shown in Figure 2-7.
Battery connection terminalLoad connection terminalDry contact AC input MCB
Earth terminal
Figure 2-7 Connection terminals (back view)
Refer to Table 2-9 to connect the input and output cables.
Table 2-9 Connection descriptions of input and output cables
Cable
Connection
From
To
AC input cable
AC power
AC input MCB
DC output cable
Load connection terminal
Load
Battery cable
Battery string
Battery connection terminal
2.4.2 Connecting Signal Cables
1. Cable connection of NetSure 211 C45-S1 power supply system
The position of the dry contact and temperature probe connection terminal is shown in Figure 2-5, and the screen
print is shown in Figure 2-8.
+ - + -
NO COM NO COM PS Ground T1 T2
DO2DO1DI2DI1 Temp. sensor
Figure 2-8 Dry contact and temperature probe connection terminal
Connection method:
Peel one end of the signal cable and insert it into the dry contact and temperature probe connection terminal. Fasten
the connection by tightening the screw on the terminal.

Chapter 2 Installation Instruction 9
NetSure 211 C45 Embedded Power Supply System User Manual
2. Cable connection of NetSure 211 C45-S2 power supply system
The position of the dry contact and temperature probe connection terminal is shown in Figure 2-7, and the screen
print is shown in Figure 2-9.
A
A amplified view
Figure 2-9 Dry contact

10 Chapter 2 Installation Instruction
NetSure 211 C45 Embedded Power Supply System User Manual
Connection method:
Peel one end of the signal cable and insert the end to OT connection terminal or UT terminal with M4 installation bolt.
Carry out the insulation process to the connection terminals and cable ends. Insert the connection terminals into the
dry contacts. Fasten the connection by tightening the screw on the terminal block.
Warning
Notice
Note
The output dry contacts are normally open by default. If users want to use normally-closed contacts, they need to pull out the
monitoring module and change the NO-COM connections to NC-COM connections at the dry contact socket. The position and
definition of the dry contact socket is shown in the following figure.
The default associations of the relays are: critical alarm associating with DO1, and major alarm associating with DO2.
A
A amplified view

Chapter 3 Installation Testing 11
NetSure 211 C45 Embedded Power Supply System User Manual
Chapter 3 Installation Testing
This chapter introduces procedures of installation testing. The corresponding safety rules shall be adhered to in the
test.
3.1 Installation Check And Startup
Before the test, inform the chief manufacturer representative. Only the trained electrical engineer shall conduct the
system testing. Remove metal objects that may cause shortcircuit, such as rings, watches, and so on.
During operation, watch out for hazardous voltage, and avoid personnel injury and property damage. Before the test,
ground the equipment properly. Installation check must be done before testing, then the batteries can be charged for
the first time.
Make sure that the AC input MCB and load MCBs are switched off. Make sure that all the devices are properly
installed.
Check the system according to the following items listed below.
Installation check
Check item
OK
Comments
Verify all the MCBs, fuses and cables

Verify the system grounding, input and output cable connection

Verify the battery cell number, connection, and battery string polarities

Make sure all the cable connections are firm and reliable

Make sure all the communication cables and alarm cables are connected to the monitoring module. Check
that the temperature sensor, if any, has been installed correctly

Startup preparations
Check item
OK
Comments
Make sure that all the MCB are switched off and all the fuses are removed

Measure the AC input voltage. Make sure the input voltage is within the allowable range

Umin=___V
Check that the battery string circuit is not closed

Connect the disconnected batteries to the battery string circuit

Measure with a voltmeter across the connection points of each battery and make sure that the polarity is
right. For a lead-acid battery with 24 cells, the voltmeter should read 2.0V/cell ~ 2.1V/cell or 48V/battery ~
51V/battery. If the voltage of certain cell is lower than 2.0V, that cell must be replaced

Umin=___V
Check with an ohmmeter that there is no short circuit between the positive & negative distribution busbars,
or between the positive & negative battery poles
(Note: Pull out all modules before the check and restore them after the check)

Startup
Check item
OK
Comments
Switch on the system AC input MCB, and the monitoring module should display the correct voltage and
current values

The green indicator on the rectifier should turn will be on and the fan should will start running. After a
certain delay, the monitoring module should show that the power supply voltage is 53.5V

Check the system voltage and busbar polarity with a voltmeter. The voltage difference between the
measured value and displayed value should be less than ± 0.3V

Start and stop each rectifier by inserting and unplugging the rectifiers. Check their output voltages


12 Chapter 3 Installation Testing
NetSure 211 C45 Embedded Power Supply System User Manual
3.2 Basic Settings
When the system is put into service for the first time, the parameters of the monitoring module must be set based on
the actual system configuration, battery number and capacity, user’s charge current limiting and other functional
requirements. Only after that can the monitoring module display system operation information and control the output.
To change the settings, enter the main menu Settings (password: 1) Battery Settings Batt. Selection
submenu, set the ‘Mode’parameter to ‘Manual’, and then return to the submenus of Battery Settings menu to set the
parameters For detailed setting method, see SCU + Series Monitoring Module User Manual.
Check item
OK
Comments
The system model has been set correctly in factory before delivery, check that the setting agrees with
the actual system (48V/SET)

The battery string number set at the monitoring module should be the same as the number actually
connected (Default: 2)

Set the battery capacity according to the total capacity of all the battery connected to the system.
Default: 300Ah

Configure the temperature compensation coefficient according to the battery manufacturer’s
requirement. Setting range: 0mV/°C ~ 500mV/°C. Default: 72mV/°C (if no temperature sensor is
installed, do not set this parameter)

Set the charge current limit according to your needs. Setting range: 0.1C10 ~ 0.25C10 (Default: 0.1C10)

Set the monitoring module according to the voltage suggested by the battery supplier.
Float Charge (FC) voltage range: 42V ~ Boost Charge (BC) voltage. Default: 53.5V.
BC voltage range: FC voltage ~ 58V. Default: 56.4V.
For batteries that do not need BC, set the BC voltage to FC voltage plus 0.1V

Measure the battery voltage with a multimeter and record it. Enter main menu Maintenance
(password: 1) RectTrim submenu. Set the output voltage of the rectifier to the value of the battery
voltage. Insert the battery fuse. Set the output voltage of the rectifier to 53.5V

Enter the Batt. Selection submenu. Set the ‘Mode’parameter to ‘Auto’

Note*: if the capacity of the battery is smaller than 50Ah, set the ‘Capacity’to 50Ah
3.3 Alarm Check And System Operation Status Check
Alarm check
Check that all functional units can trigger alarms and the alarms can be displayed on the monitoring module.
Check item
OK
Comments
Pull out one rectifier, and the ‘Rect N Com Failure’ alarm should be triggered. Insert the rectifier in, and
the alarm should disappear. Repeat the same procedures on other rectifiers

Switch off battery MCB 1, and the ‘Batt1 Failure’ alarm should be triggered. Switch on battery MCB 1,
and the alarm should be cleared. Repeat the same on battery MCB 2

Switch off a load MCB connected to load, and the alarm ‘Load Fuse N Failure’ should be triggered.
Switch on the load MCB, and the alarm should be cleared. Repeat the same on other load MCBs

Switch off the battery MCBs. Keep only one rectifier in operation. Through the monitoring module,
adjust the rectifier FC voltage to make it lower than the alarm point. The alarm ‘DC Voltage Low’ should
be triggered

Keep the rectifiers in operation. Set through the monitoring module the battery management parameter
to ‘Manual’. Enter the maintenance menu at the monitoring module. Select ‘Disconnect’and confirm it.
The battery protection contactor should be open, and the ‘BLVD’alarm should be displayed at the
monitoring module

Note: The monitoring module will give alarms approximately 10s after the alarms are triggered. Enter main menu Operation to
view the alarm information

Chapter 3 Installation Testing 13
NetSure 211 C45 Embedded Power Supply System User Manual
System operation status check
There should be no alarms during normal system operation. The system operation status check can be conducted
through the monitoring module.
Check item
OK
Comments
The system model is correct (48V/SET)

The monitoring module should display the correct AC voltage

The difference between the voltage displayed by the monitoring module and the actual value should
be less than ±0.3V

The difference between the battery current displayed by the monitoring module and the actual value
should be less than 1%

Check the number of the rectifier through the monitoring module. The number should be consistent
with the actual number

Check the voltage, current, current limiting point of rectifiers through the monitoring module. They
should agree with the actual parameters

For the system configured with temperature sensor, the monitoring module should display the battery
ambient temperature. Hold the probe of the temperature sensor and watch the monitoring module,
which should display the change of temperature

3.4 Final Steps
Check item
OK
Comments
Make sure that materials irrelevant to the equipment have been all removed

Fill in the installation report and hand it over to the user

Fill in the parameter table on the cabinet door

If any defect is found in this equipment, inform the personnel responsible for the contract.
If repairing is needed, please fill in the FAILURE REPORT and send the report together with the defective unit to the
repairing center for fault analysis.

14 Chapter 4 Alarm Handling
NetSure 211 C45 Embedded Power Supply System User Manual
Chapter 4 Alarm Handling
This chapter describes the handling of alarms, as well as the preventive maintenance of the system during system
daily operation.
The maintenance personnel must have adequate knowledge about the system.
Note
1. The maintenance must be conducted under the guidance of related safety regulations.
2. Only the trained personnel with adequate knowledge about the system can maintain the inner part of the system.
4.1 Handling Alarms
The monitoring module alarms are classified in four types: critical alarm, major alarm, observation alarm, and no
alarm.
Critical alarm, major alarm: These two types of alarms have strong impacts on the system performance. Whenever
these alarms are generated, users are supposed to handle them immediately. The monitoring module will turn on the
alarm indicator and generate audible alarm.
Observation: When this type of alarm is raised, the system maintains normal output for a while. If the alarm occurs
during watch time, it should be handled immediately. If the alarm occurs during non-watch-time, handle it at the
beginning of the watch time. The monitoring module will only turn on the alarm indicator.
No alarm: In case of an alarm set as ‘no alarm’by the users, no visual or audible alarm will be generated and the
system will work normally.
The handling methods of common alarms are given in Table 4-1.
Table 4-1 Troubleshooting
No.
Alarm
Handling method
1
Mains
Failure
If the failure does not last long, the battery will power the load. If the cause is unknown or the failure
lasts too long, a diesel generator should be started. Before using the generator’s power, it is suggested
to run the generator five minutes to stabilize the power output
2
AC Voltage
High
Check if the AC Over-voltage point is too low. If yes, reset the value.
A mild over-voltage does not affect the system operation. However, the rectifier will stop operation when
the mains voltage is more than 305V. Therefore, if the power supply voltage is often high, consult with
the power grid maintenance personnel to improve it.
3
AC Voltage
Low
Check if the AC Under- voltage point is too high. If yes, reset the value.
When the mains voltage is lower than 176V, the output power of the rectifiers will be derated. If the
power supply voltage is often low, consult with the power grid maintenance personnel to improve it.
4
DC Volt High
1. Check the system DC output voltage and value of ‘Over’ set through the monitoring module. If the set
value is improper, correct it.
2. Find out the rectifier that has caused the alarm.
First of all, ensure that the batteries can operate normally. Then switch off the AC input of all rectifiers.
Power on the rectifiers one by one. If the over-voltage protection is triggered when a certain rectifier is
powered on, that rectifier is the faulty one, replace it
5
DC Volt Low
1. Check the system DC output voltage and value of ‘Under’ set through the monitoring module. If the
set value is improper, correct it.
2. Check if the alarm is caused by mains failure. If yes, disconnect certain loads to prolong the operation
of the whole system.
3. Check if the alarm is due to rectifier fault, find out the faulty rectifier and replace it.
4. Compare the total load current with the total rectifier current during float charge. If the former is bigger
than the latter, disconnect partial loads, or add several rectifiers, with at least one rectifier redundant, to
make the total rectifier current bigger than 120% of the total load current
6
Load Fuse
Alarm/ Batt
Fuse Alarm
Check if the MCB or fuse of the route is switched off. If the MCB is open, find out the fault and remove
it. Or check the voltage at the alarm fuse. If the voltage is almost 0V, the fuse is normal.
Otherwise, the alarm loop is faulty. Please contact Emerson