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SAMLEX AMERICA, INC. | 1

BATTERY MONITOR BW-01

OWNER'S MANUAL

Description and Features: This unit is an Intelligent, microprocessor based,

panel mounted battery voltage monitor for display of the State of Charge of 12V / 24V

battery with the help of buzzer and different patterns of Red / Yellow / Green LEDs: steady

/ blinking / slow or fast “Walking LEDs”. 12V / 24V battery is detected automatically when

voltage of 7 to 32V is seen on connection of the battery. Following parameters / conditions

are displayed:

• Terminalvoltage

• Charginginprogress

• Alarmatprogrammedlowvoltagethreshold.

• Alarmatprogrammedhighvoltagethreshold

• 3-DayTimer/SwitchOFF the unit for low voltage protection

Layout and Dimensions

Installation:

Please refer to Figs 1 and 2 above. The unit consists of a 65 x 65 mm

front plate with 4 x 3.2 mm holes for ush mounting on a wall / panel with 4 screws (#4,

Tapping, Flat Head). The Printed Circuit Board (PCB) and Battery Input Connectors (0.25”/

6.3 mm Quick Connect Tabs) are located at the back of the plate and project out to a

depth of 25.5 mm. For ush mounting on the wall / panel, a pocket / slot measuring 30

mm x 30 mm x 40 to 50 mm depth is required to be made to accommodate the projection

at the back.

UseAWG#22to26wires(e.g.telephonewires)toconnecttothebattery(See

Fig.2).Usea0.5AfuseinserieswiththePositivewire.Thefuseshouldbeascloseas

possible to the battery Positive terminal (preferably within 7”).

RefertoFig2.BatteryPositive(+)andNegative(-)connectionstotheunitaremade

throughBatteryInputConnectors“A”and“B”(1/4”/6.3mmMaleQuickConnectTabs).

For this connection, use 0.25”/6.3 mm Female Quick Connect Receptacle Terminal Lugs on

the wire ends (See Fig 3).

12V / 24V battery is detected automatically when voltage of 7 to 32V is seen on

connectionofthebattery.Atstartup,RedLEDisactivatedasasignofpowerup.After

some time, the unit is initialized and 12V / 24V battery is recognized. The State of Charge

is displayed thereafter.

LED and Buzzer Indications for Voltage Levels:

*NOTE: Term “Walking LEDs” has been used to indicate cyclical, sequential lighting

pattern of Red, Yellow and Green LEDs. This pattern indicates that charging is taking

place. Following 2 patterns are used:

• “Walking LED’s - Fast” + Beep: Indicates charging at voltage that is higher than the

programmed value of High Voltage Threshold (14.8V (Preset) / 15.3V / 16V for 12V

battery and 29.6V (Preset) / 30.6V / 32.0V for 24V battery). The loop is: {Red » Yellow

» (Green + Beep) »AllOFF}…repeatsthissequentialloop.

• “Walking LED’s – Slow”: Indicates charging at voltage higher than 13.3V (12V

battery) / 26.6V (24V battery) but lower than the programmed value of High Voltage

Threshold (14.8V (Preset) / 15.3V / 16V for 12V battery and 29.6V (Preset) / 30.6V /

32.0V for 24V battery). The loop is: (Red » Yellow » Green»

AllOFF)…repeatsthissequentialloop.

Status of LEDs

and Buzzer

Battery Voltage

indicated for 12V

Battery

Battery Voltage

indicated for

24V Battery

*WalkingLED’s-Fast+Beep(Indicates

charging in progress and the voltage is

higher than the programmed threshold

ofOverVoltageAlarm)

> 14.8 (Preset) /

15.3V / 16.0V

> 29.6V (Preset) /

30.6V / 32.0V

*WalkingLED’s-Slow(Indicates

charging in progress under normal

conditions)

> 13.3 But <(14.8V

(Preset) / 15.3V /

16.0V)

> 26.6V But < (29.6V

(Preset) / 30.6V /

32.0V)

Green > 12.4 > 25.0V

Green+Yellow > 11.6 > 23.2V

Yellow > 11.2 > 22.2V

Yellow+Red > 10.9 > 21.8V

Red > 10.5 >21.4V

(Green+Yellow+Red)-Blinking - > 21V

Following pattern indicates voltage is

below the programmed threshold for

LowVoltageAlarm:

(Red + Green) »(Yellow+Beep)…

repeats 10 times

» (Red + Green) » (Yellow)…repeats

10 times

» AllLEDsOFF.Unitenters

SleepMode.Thereisabeepeverymin.

< 10.5 (Preset) or

< programmed

values of 10.6V

/ 10.7V / 10.8V

/ 10.9V / 11.0V

/11.1V / 11.2V

< 21V (Preset) or <

programmed values

of 21.2V / 21.5V

/ 21.6V / 21.8V

/ 22.0V / 22.2V /

22.4V

High Voltage Alarm during Charging: Following voltage thresholds can be

programmed to warn about over voltage condition during charging (See programming

procedure given separately).

• 14.8V(Preset)/15.3V/16Vfor12Vbattery

• 29.6V(Preset)/30.6V/32.0Vfor24Vbattery

This facility can be used to indicate onset of “Equalization Stage” when charging Flooded

/ Wet Cell Batteries. During “Equalization Stage”, the battery is intentionally overcharged

to 15.3 to 16V (12V battery) / 30.6 to 32V (for 24V battery) for limited time of 1 to 3

Hrs. During this time, it is necessary to monitor the battery for overheating / electrolyte

level / measurement of individual cell voltages and for turning OFF Equalization at the

appropriate time.

The display pattern is “Walking LEDs – Fast” + Beep. In this pattern, the display / buzzer

loopis:{Red»Yellow»(Green+Beep)»AllOFF}......Repeatsthissequentialloop.

NOTE: The unit will not reset even after the battery voltage drops below the programmed

Over Voltage Threshold. This is helpful to know that an over voltage condition existed. The

alarm can be reset manually as follows:

• PressandholdProgrammingButton»Beepwillbeheard»ReleasetheButton

Low Voltage Alarm: Following voltage thresholds can be programmed to warn

about low voltage condition (See programming procedure given separately).

• 14.8V(Preset)/15.3V/16Vfor12Vbattery

• 29.6V(Preset)/30.6V/32.0Vfor24Vbattery

When the programmed Low Voltage Threshold is reached, the following LED / Buzzer

pattern will be observed:

(Red + Green) »(Orange+Beep)…….Repeats10times

» (Red + Green) »(Orange)…..Repeats10times

»AllLEDsOFF.UnitentersSleepMode.Thereisabeepeveryminutesothatitisclearthat

theunitisnotina“3DayOffMode.”

NOTE: The unit will reset only when the battery voltage rises to > 13.3V (for 12 V battery)

/ 26.6 V (for 24V battery) i.e. when charging takes place.

3-Day Timer: A3-DayTimerhasbeenprovidedtoautomaticallyswitchOFFtheunit

after 3 days of switching ON of the Timer or if the battery voltage drops below 10.4V (for

12V battery) or 20.8V (for 24V battery). The Timer will be automatically switched OFF after

the battery voltage rises above 13,3V (for 12V battery) or 26.6V (for 24V battery).

ON/OFFModescanbeprogrammedasshownunderheading“Programming

AlarmThresholds/3-DayTimer.”

3.2

Fig 1. BW-01 Front View Fig 2. BW-01 Back View & Battery Connec-

tion (Note: Same dimensions as front view)

14.9

PCB

0.5A

Fuse

Wire AWG #22 to 26

Fig 2.:

A – 1/4" (6.3mm) Quick Connect Tab Terminal

for connection to Positive (+) of the battery

B – 1/4" (6.3mm) Quick Connect Tab Terminal

forconnectiontoNegative(-)ofthebattery

Fig 1.:

1 – Red LED

2 – Yellow LED

3 – Green LED

4 – Buzzer (at the back)

5 – Programming Button

Fig 3. 0.25”/6.3 mm Female Quick

Connect Receptacle Terminal Lug

Summary of content (2 pages)

PAGE 1
BATTERY MONITOR BW-01 | OWNER'S Manual Description and Features: This unit is an Intelligent, microprocessor based, panel mounted battery voltage monitor for display of the State of Charge of 12V / 24V battery with the help of buzzer and different patterns of Red / Yellow / Green LEDs: steady / blinking / slow or fast “Walking LEDs”. 12V / 24V battery is detected automatically when voltage of 7 to 32V is seen on connection of the battery.
PAGE 2
Battery Monitor BW-01 | owner's Manual Programming Procedure: Brightness of LED Display: The unit comes preset with brightness of the LEDs set at Normal (Bright). The brightness can be dimmed or the LEDs can be switched OFF. Settings can be changed with the help of the Programming Button (5, Fig 1). Settings are performed in sequential order in a loop: Bright » Dim » Off » Bright » Dim » Off… repeats the loop.