BATTERY MONITORING RELAY
For crucial battery system applications, the Be48 battery monitoring relay is the best option.
KEY FEATURES
USB CONFIGURABLE UP TO 500V
HIGH PRECISION BATTERY MONITORING
RAIL MOUNT
SOLAR BATTERY STORAGE
ENGINE BATTERY MONITORING
You can easily configure it by using a computer via USB. The measurement precision of the Be48 battery monitoring relay can be calibrated down to 0%.
The Be48 DC voltage monitoring relay can monitor the voltage of your SOLAR BATTERY PACK or the engine battery voltage. In this case, the Be48 will start the engine to maintain the battery in good condition. A set of voltage thresholds and delay timings adapt the Be48 to your specific application. You can easily interface the Be48 with the most popular auto-start modules.
Battery Monitoring Relay Circuit Diagram
You can supply the BE48 with a DC source between 8 to 30 Vdc connected to terminals JA1-2 via a protection fuse [6]. The JA3-4 terminals can deliver an electronically limited 300mA current [7]. The inputs JA1-2 are protected from reverse polarity for an unlimited time. To monitor a voltage up 100Vdc connect the terminals JF2-3. For higher voltage, up to 400 Vdc connect the terminals JF1-4. The polarity of the connection does not matter but we highly recommend protecting the wires with a suitable fuse. The following diagram shows general-purpose battery monitoring. Connect the engine's battery to JF2-3: it will monitor the engine battery.
A SIMPLE LOW-BATTERY GENERATOR AUTO START
You can connect the terminals JD3-4 to drive an alarm indicator and use terminal JD1-2 to activate a power generator [5] via an auto-start module [4]. JD1-2 and JD3-4 are internally connected to 30V 1A relays. Even though the relays are rated 230V-8amp, we recommend limiting the current to 300 mA (there are internal 500 mA thermal protection circuits). If you drive inductive loads, the use of flywheel diodes is mandatory. In the following diagram, the JD2-3 terminals are connected to Battery Plus. The Be48 activates the output relays by delivering a positive voltage.
BE48 BATTERY MONITORING RELAY INSTALLATION MANUAL
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HOW TO SUPPLY THE VOLTAGE MONITORING RELAY
The basic goal of the relay is to keep a healthy battery. In other words, the relay will instruct your system to "take action". The easiest way to supply the relay is to use the low DC voltage of your control panel. The Be48 should not consume precious current from the battery pack. In particular cases, the 12V or 24V source is unavailable. If you have a source that exceeds the 30V, we recommend using a DC-DC adapter with 12V or 24V output. Use our POWER SUPPLY ADAPTER 30-75Vdc/12Vdc/1A (input range 30-75Vdc).
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SETTING UP THE VOLTAGE MONITORING RELAY
Before placing the BE48 MONITORING RELAY into your system, set up the adjustable parameters. Factory defaults set the BE48 in 'NON-OPERATIVE' mode.
PRELIMINARY OPERATIONS
We provide free-of-charge software that allows you to set up the relay. You will obtain the link to the software after you purchase a BE48 relay. The Be48 monitoring relay is supplied with a 1-meter-long USB cable fitted with USB TYPE ‘A’ on one side. The Be48 side features a USB TYPE ‘B’ connector.
!! CAUTION !!
Make sure that the SUPPLY MINUS you use for the Be48 is at the same potential as your computer. The best safety condition is obtained when the terminal minus of DC supply is grounded. Another option is to use a battery of 12V or 24V or to use a normal isolated power supply. To avoid electric shock verify that there is no significant voltage between the supply minus and the shell of your USB cable.
USB CONNECTION
- Provide a DC supply in the range of 10..30Vdc capable of supplying at least 200mA.
- Turn OFF the supply.
- Connect DC supply plus to terminal JA1 and supply minus terminal JA2.
- Activate the DIP-SWITCH number 3 to its 'ON' position, disabling the USB PORT.
- Turn on the DC supply; the Be48 will turn on all LEDs for a second.
- The GREEN LED DL1 turns on indicating a "controller ready".
- Connect the USB cable to the computer and Be48.
- Start the application 'BE48 DC Voltage Monitoring' on your computer.
- When the red message ‘CONNECTING’ appears on the screen, enable the USB PORT by turning OFF the DIP-SWITCH number 3.
- The computer screen will indicate on the top left corner, the green message is ' CONNECTED'.
UNDERSTANDING THE CONFIGURATION SOFTWARE
The software in addition to offering the battery system measurement features power supply indication and a set of adjustable settings. There you are an overview of the screen.
[1] Battery voltage measurement [2] Thresholds settings [3] Timing settings [4] Mode of operation [5] Main buttons
VOLTAGE SETTINGS
'Low Voltage Start' is the voltage level of the battery that triggers the timer 'T1' (once 'T1' expires, the output relay turns on). 'High Voltage Stop' is the voltage level of the battery that triggers the timer 'T2' (Once 'T2' expires, the output relay turns off).
Use the mouse over the up/down arrows to set 'Low Voltage Start' and 'High Voltage Stop'.
We advise keeping a minimum of 2 V between "Low Voltage Start" and "High Voltage Stop" to ensure stability. Always set "High Voltage Stop" higher than "Low Voltage Start."
TIMING SETTINGS
START & STOP delay timers are used to provide flexibility to your application. You can use these timers to avoid false start and stop commands. The voltage comparator itself has a fast response and may cause system instability.
In this example, the output relay turns on after one minute (T1). After 30 minutes (T2), it turns off. You can put the timers to zero when Be48 is used in particular applications. The range of the timers spans from one second up to 24 hours. This picture makes it clear.
THE BASIC COMMANDS
The basic available commands are SAVE (to store a parameter), DEFAULT (to use factory settings), and RELOAD (it cancels a modification and restores the previous setting). If you modify a parameter, a yellow background will warn you. Once stored in the memory the yellow background will disappear
TIMEOUT SETTING
UNDER OVER-VOLTAGE TIME RELAY
When you want to add security to your system, use this additional timer. If there is a failure on the charger, you will never be able to charge the battery. You can also risk overcharging the battery. This timer limits, for example, the run time of the engine. Once the BE48 triggers the alarm, remove the DC power supply. Unplug the JA connector for a few seconds. This will reset the alarm.
STEP 7 OPTIONAL VOLTAGE CALIBRATION
The factory precision of the measurements is about 1%. If you want more precision, we recommend that you carry out the calibration. Use a precise measurement instrument for the battery and you will take note of the measurement. Push the button [Calibration]. Choose the proper range: 60V or 300V according to your measurement. Use up and down to match the measurement. Click the "SAVE" button. The Be48 will calculate the correction factor. You'll get precise readings. A good calibration will allow you a 0,1% accuracy. The calibration is stored in a NON VOLATILE memory.
DC VOLTAGE LOGGER
The BE48 has a real-time data logger that you can use to test the system with extreme accuracy. By analyzing the TIMESTAMP you can find out if the system works well. To enable the LOG HISTORY, maintain your computer connected to the BE48. We recommend that you use a fully isolated USB repeater. Using normal cable extenders you can cover distances up to 20 meters without problems.
BE48 LED INDICATORS AND DIP-SWITCH
The DIPSW 1 and 2 are not used in the standard version. The DIP3 is momentarily used to enter the configuration procedure.
The DIP4 activates the comparator output relay. You can use it to make a test. As long as the switch is activated (on) the DL4 will continuously blink.
The DL1 green indicator turns on when the CPU is running. It blinks fast when the DC supply is lower than 8Vdc for at least 5 seconds. In this case, the Be48 turns continuously on the red LED indicator DL5.DC Supply: 5.5/36Vdc, 50/150mA
The DL2 yellow indicator blinks slowly when the battery voltage is lower than the threshold. It blinks fast when the battery voltage is over the threshold. It remains lit when the voltage is within the settings
The DL3 yellow indicator is normally off. It blinks when the Be48 activates a timer T1 or T2
The DL4 yellow indicator turns on when the output relay JD1-2 is energized. It turns off when the relay output is off. It blinks fast when the BE48 is in TEST MODE (DIPSW4 is in its ON position).
The DL5 red indicator turns on in case of alarm time-out (it energizes the relay alarm and de-energizes the relay comparator output)
The DL5 turns on when the DC falls below 8VDC for at least 5 seconds. When the voltage rises above 8Vdc, the alarm auto resets.
BE48 SPECIFICATIONS
DC Supply: 5.5/36Vdc, 50/150mA
Aux supply output: 600mA @ DC Supply-0.5V
Protection: 300mA thermal fuse
Dimensions:: 110 X 120 X 22 (mm)
DIN RAIL mount
Operating temperature: -25 deg C up to +70 deg C
Humidity range: 5% up to 95%
Weight: 130 grams
Meets ECC 89/336, 89/392, 73/23, 93/68, IEC 68-2-6
Certification: CE
Yellow LED Indicators: 3
Red LED Indicator: 1
Green LED Indicator: 1
DC Relay Outputs: 1A 30VDC.
AC Relay Outputs: 5A 250V AC
Connectors: removable terminal blocks
Battery monitoring Vdc: 5-500Vac
Configuration via USB
Battery monitoring Vdc: 5-400Vdc
Zona Industriale
46035 Ostiglia Italy
bernini@bernini-design.com
0039 335 70 77 148