Universal Battery Monitor - Midtronics Stationary Power

Universal Battery Monitor - Midtronics Stationary Power
48V Cellguard Trace
October 2007
The Midtronics 48V Cellguard Trace Battery Monitor (UBM-1048) is
designed to monitor and test conductance, voltage and temperature
in 48V battery backup system applications. In the event of test failure,
the Battery Monitor can also be configured to send an alarm via binary
The Cellguard Trace can be permanently installed on a battery rack along
with the supplied 48V Battery Cable Harness. Using the included DB-9
cable, the monitor can communicate with a Windows-based computer
running the included MonitorClient application software. Collected data
can also be displayed in standard spreadsheet applications.
1 - UBM-1048 Battery Monitor
1 - 48V Battery Cable Harness
Figure 1
1 - DB-9 Cable
1 - MonitorClient Software CD
Battery Connections
Use the supplied custom cable harness to connect the battery monitor to
the batteries in the rack.
1. Disconnect the batteries from the charging unit.
Hazardous voltage.
Can cause death or serious
personal injury.
To avoid electrical shock or burn,
turn off main and control voltages
before performing installation or
Battery 4
Battery 3
Battery 2
Battery 1
Figure 2
6. At the BATT 2 (-) end of the cable, attach the fuselinks connected to
the black wires bundled with the white and green wires, and the copper ring terminal, to the negative (-) terminal of battery 2.
7. Repeat steps 5 and 6 for batteries 3 and 4.
System will not have back up while
main power is disconnected.
To minimize risk of downtime, install the
monitor during non-peak hours.
NOTE: The ring terminals are for the temperature sensor.
Connection Verification
2. Locate battery 1 in a series configuration. Battery 1 is considered to
be the most positive battery.
3. Attach the fuselinks connected to the red and blue wires in the cable
harness labeled BATT 1 (+) to the positive (+) terminal on battery 1.
(Figure 2)
4. At the BATT 1 (-) end of the cable, attach the fuselinks connected to
the black wires bundled with the white and green wires, and the copper ring terminal to the negative (-) terminal of battery 1.
5. Attach the fuselinks connected to the red and blue wires in the cable
harness labeled BATT 2 (+) to the positive (+) terminal of battery 2.
Improper battery connections could
damage battery monitor.
Verify battery connections with a voltmeter
before connecting the Battery Monitor.
Verify the proper battery connections using the connectors at the Battery
Monitor end of the cable harness.
1. Insert the positive voltmeter lead into the red wire on the Battery 1
connector. (Figure 3)
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48V Cellguard Trace
October 2007
4. The green POWER LED on the top of the Battery Monitor should now
be illuminated.
NOTE: The monitor has 2 form C contacts that can be configured normally open (NO) or normally closed (NC).
Both Major and Minor Alarm contacts are in the alarm
state when the monitor is not powered.
Batt 1
The NC (Normally Closed) contact is open and the NO (Normally Open)
contact is closed when the unit has power and is not in an alarm state.
When an alarm is triggered, the NC contact is closed and the NO contact is open. Contact positions are summarized in the following table.
No Power
With Power
Alarm Condition
NC = Closed
NC = Open
NC = Closed
NO = Open
NO = Closed
NO = Open
If a contact closure triggers an alarm on the alarm panel, then use
the CN (Normally Closed) pins on the connector.
Figure 3
5. Re-apply power to the battery charger.
Installing the MonitorClient Software
1. Insert the included software CD into the appropriate drive in a Windows-based computer.
Batt 2
Batt 3
Batt 4
Batt 1
Batt 1
Batt 1
2. Using Windows Explorer or the “My Computer” icon on the desktop,
create a new folder on the computer’s hard drive.
3. Copy the files from the CD into the new folder.
4. To open the software from the computer’s hard drive, double click
on the “MonitorClient.exe” file to open it or click once on the file to
highlight it and then press the Enter key on the keyboard.
Figure 4
2. Insert the negative voltmeter lead into one of the black wires on the
Battery 1 connector.
3. Measure the voltage. When properly connected, the meter should
read a nominal +12 Volts. (Figure 3)
4. Move the negative voltmeter lead to one of the black wires on the
Battery 2 connector. When properly connected the meter should
read a nominal +24 Volts. (Figure 4)
5. Repeat the process for batteries 3 and 4. The meter should read a
nominal 36 and 48 volts respectively.
Monitor Connections
Only connect the 48V Battery Cable Harness to the Battery Monitor after
the battery connections have been verified with a voltmeter.
1. Plug the ALARM cable into the ALARM connector on the Monitor (Six
pin green connector).
2. For battery 4, plug the two-pin temperature connector into the 2-pin
TEMP and the four-pin battery connector into the four-pin connector
connector on the Battery Monitor.
3. Repeat step 2 for batteries 3, 2, and 1.
Midtronics Inc.
7000 Monroe Street
Willowbrook, IL 60527
NOTE: The Monitor-Client software does not use an installation program.
5. Plug the DB-9 male-to-female serial cable from the COM PORT on
the monitor to the PC serial communication port. If your PC does not
have a serial communication port, a USB-to-serial adapter (not supplied) is required.
NOTE: The MonitorClient software must be installed on the
computer before communications with the Battery
Monitor can be established.
Using the MonitorClient Software
1. Open the MonitorClient software and click on the “Connect” button to
connect to the Battery Monitor. If prompted, select the proper COM
port for your computer. Once communication with the Battery Monitor has been established, the date, time and results from the most
recent test cycle is displayed.
NOTE: The MonitorClient software will not connect with the
Battery Monitor while the monitor is actively performing a battery test.
2. Click on the “Reference Setup” button to adjust major and minor
threshold parameters.
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48V Cellguard Trace
October 2007
NOTE: Factory preset settings are for reference only. Configure threshold parameters according to company policies and ambient surroundings.
NOTE: The Battery Monitor will continue to use the previously
loaded values until the monitor has been updated and
5. Click “OK” to return to the main screen.
By default the Battery Monitor will test a battery array once every 24
hours. Click “Test” to force the Battery Monitor to perform a test using the new parameters.
In the event of a triggered alarm, the appropriate LED’s on the top of
the unit will illuminate. The Battery Monitor can also send an alert
via binary contacts.
NOTE: Following an alarm, the Battery Monitor will remain in
a latched condition until the reset button on top of the
unit has been pressed.
Viewing The Log File
1. To view the logged data, double click on the “MonitorLogAccum.csv”
file, located in the same folder created when the software was copied
onto the computer.
Battery Monitor Default Settings
Conductance Reference Value = 2200 Mhos
Minor Alarm
Major Alarm
Conductance % of Reference
Low Voltage
High Voltage
Low Temperature
-4°C (25°F)
-20°C (-4°F)
High Temperature
50°C (122°F) 60°C (140°F)
2. The appropriate spreadsheet application, such as Microsoft Excel,
opens and the data is displayed.
NOTE: The spreadsheet application is not included with the
MonitorClient software and must already be loaded
onto the computer.
3. Click “Update Monitor” to send the new paramaters to the Battery
Monitor. A notification window will appear once the parameters have
been successfully updated.
4. The monitor MUST be reset after the threshold parameters have
been updated. Do this by pressing the “Reset” button on top of the
Battery Monitor.
Battery Voltage
The Battery Monitor interfaces with four individual 12 volt batteries
with a nominal voltage of 48Vdc.
Fused Battery Cabling
The Monitor battery cabling contains in-line fuses of sufficient current rating to support normal system operation and capable of blowing upon the occurrence of an adverse situation such as due to a
short or other high current draw.
Battery Type
The monitor is capable of monitoring VRLA (Valve Regulated Lead
Acid), AGM (Absorbed Glass Mat), and Gel type stationary batteries.
Battery Temperature Monitor Connections
The Monitor temperature cabling is a 2-wire interface. The cable
connects to the negative post of the battery via a ring terminal.
Battery Terminal Connections
The Monitor battery cabling connects to the battery via ring terminals. Each post will require 1 connection, for a total of 2 connections per battery.
Monitor Alarm Cable
The Monitor alarm cable is a 6-wire, 26 AWG solid conductor
Midtronics Inc.
7000 Monroe Street
Willowbrook, IL 60527
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48V Cellguard Trace
October 2007
Monitor Functional Specifications
System Measurements
The Monitor measures battery conductance, DC voltage, temperature, and string voltage. The Monitor uses a 1 Amp average current
excitation signal.
Alarm Thresholds
Baseline conductance reference values must be determined for
each battery model. The monitor provides a temperature compensated percent of reference between 0 – 35°C (32 - 95°F). The
percent of reference is compensated 0.7% per degree Celsius away
from 25°C. Below 25°C the percent of reference increases and
above 25°C the percent of reference decreases.
Monitor Current Consumption
The total power consumed by the Monitor in active, non-testing
mode is 60mA.
Monitor Performance Specifications
Battery Conductance Range
100 s < Siemens < 4,000 s for 12 Volt batteries
Battery Voltage Range
10.500 V < V < 15.000 (12 Volt Battery)
NOTE: Monitor is capable of reading above this range.
Battery Temperature Measurement Range
-20°C (-4°F) < T < 70°C (158°F)
String Voltage
42V < V < 58 for 48 Volt operation
Electronics Temperature Range
-20°C (-4°F < T < 70°C (158°F)
Monitor RS232 Data Interface Requirements
Physical Interface
The Monitor supports transfer of signals across the Monitor interface in accordance with the RS-232 standards
Signaling Protocol
The signal transmission adheres to the Universal Asynchronous Receive/Transmit (UART) protocol.
The Monitor is the SLAVE for this interface.
Default UART Parameters:
• 9600 baud rate8 data bits
• 1 stop bit
• No parity
• No flow control
Data Representation
All data is binary
Monitor System Level Requirements
Module Power Source
The Monitor is powered by the batteries being monitored
Module Dimension
Length: 9½”
Width: 3”
Depth: 1¼”
Module Environmental Requirements
The Monitor operates over the environmental ranges specified below:
Operating Temperature:-20°C (-4°F) to 70°C (158°F)
Operating Humidity: 0 – 95% non-condensing
Monitor Alarm Specifications
Alarm Description
Status LEDs are used for present state of alarm. State is re-evaluated hourly.
Minor Alarm LED
Lit when a minor threshold was exceeded. Status indicator is latched
on once a minor temperature, voltage, or conductance alarm occurs.
Latched state is cleared by depressing the reset switch.
Major Alarm LED
Lit when a major threshold was exceeded. Status indicator is latched
on once a major temperature, voltage, or conductance alarm occurs.
Latched state is cleared by depressing the reset switch.
Power LED
Lit if power is on and the microprocessor is operational.
Corporate Headquarters
Willowbrook, IL USA
USA Toll Free: 1.800.776.1995
Phone: 1.630.323.2800
Fax: 1.630.323.2844
E-Mail: net2@midtronics.com
Midtronics b.v.
European Headquarters
Serving Europe, Africa, the Middle
East and The Netherlands
Phone: +31 306 868 150
Fax: +31 306 868 158
Canadian Inquiries
Toll Free: 1.866.592.8053
Fax: 1.630.323.7752
E-Mail: canada@midtronics.com
E-Mail: info-europe@midtronics.com
European Sales Locations
IJsselstein, The Netherlands
Paris, France
Dusseldorf, Germany
Midtronics China Office
China Operations
Shenzhen, China
Phone: +86 755 8202 2037
Fax: +86 755 8202 2039
E-Mail: chinainfo@midtronics.com
Asia/Pacific (excluding China)
Contact Corporate Headquarters at
+1.630.323.2800 or
E-Mail: asiapacinfo@midtronics.com
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