Read the owners manal carefully before installing the BGB-250!
UK
Features
Auto 12 V/24 V detection
High switching current
Bistable relay
Extremely low operating current
Adjustable undervoltage
Adjustable reset voltage
Purpose
Protecting a battery against overvoltage, undervoltage and exhaustive discharge with the lowest possible quiescent current.
Installation
Follow the following steps and the connection diagram when connecting the BGB-250.
1.
Connect the apparatus to be controlled to T2.
2. (optional).
Connect a switch that switches to negative to the Remote input.
3. (optional).
Connect a lamp to the status / alarm output.
4. (optional).
Connect a pulse switch that switches to the battery plus terminal to the Start input.
5.
Connect the battery plus terminal to T1.
6.
Connect the battery plus terminal to A1.
7.
Connect the minus terminal of the BGB-250 to the minus terminal of the battery via a 5 A fuse.
Warnings:
The product may only be connected by qualified electricians who are fully aware of the requirements for working with high battery voltages.
The use of poor quality connection materials and/or excessively thin cables may result in damage to the product. (see Technical data → Cable diameter for the correct sizes)
Short circuits between the plus and the minus terminals of the battery can cause serious damage to the system.
Always use fuses.
Do not locate the BGB-250 close to highly flammable materials.
Fit the BGB-250 in a cool and dry place.
Operation
All voltages stated in this user’s manual are applicable to a 12 V system. The voltage values for both the 12 V and the 24 V systems can be seen in Table 1 and Table 2.
During connection
Before the BGB-250 is put into operation, it must first determine whether a 12 V or a 24 V system is connected. Therefore after connection there will be a one second delay before an action is undertaken.
The relay will be switched on next if the supply voltage is between the set undervoltage and overvoltage levels. If this is not the case the relay will switch off. For the factory settings and a 12 V system, the relay
will be switched on if the voltage lies between 10.5 V and 16.0 V. If this is not the case the relay will be switched off.
Excessively high voltage
The relay will switch off if the voltage exceeds 16.0 V for a period of 1 second. The relay will not switch on again until the voltage drops under 15.6 V for a period of 1 second.
Once the relay switches off so does the LED.
Undervoltage
As soon as the voltage drops below the set undervoltage level for a period of 5 seconds, the BGB-250 LED will start to flash. This is to indicate that the relay
will switch off later if the situation does not change. Should the voltage rise above the undervoltage level once again, the LED lights up normally and the device
begins to check the voltage once more. If the voltage remains under the set level the relay will switch off after 70 seconds. The LED will also switch off.
After detecting undervoltage the relay will only switch on again once the voltage has risen above the reset value for a period of 5 seconds. At the same time the
LED lights up again.
Switching on manually
If the BGB-250 has switched off after detecting undervoltage, it can be switched on manually. There are two ways this can be done:
1. Pressing the button for a short period will switch on the relay after a period of 1 second.
2. If the START input is connected to the input voltage the relay switches on immediately.
Following one of the above operations the BGB-250 will function normally again, which means if at that moment the voltage is still below the undervoltage value,
the device will switch off again after a short period.
Switching off remotely
Connecting the remote input to earth will switch off the BGB-250. From the moment that this connection with the negative terminal is broken the BGB-250 will be
switched off for at least 1 second. When the voltage drops below the overvoltage level it will switch on again. See “Excessively high voltage” for the operation of
the BGB-250 if the voltage level is above the overvoltage level.
LED
The LED lights up the moment the relay is switched on and goes out when the relay is switched off. The LED will only flash if undervoltage is detected
(see “Undervoltage”).
Programming
The user can set at which undervoltage and overvoltage values the BGB-250 should react. The 10 available options can be seen in Table 2 (where position 4 is the default setting).
The programming mode is activated the moment that the program button is pressed until the LED begins to flash. The button should be released as soon as the LED begins to flash. The user should now repeatedly
press the button until the position that must be programmed is reached. After this the BGB-250 will display the mode being programmed. Finally the relay will switch on again unless the voltage is higher than the
overvoltage value.
Example:
The user wishes to set an undervoltage of 11.5 V and an overvoltage of 12.8 V. This is row 7 in Table 2. Therefore the user should press the button 7 times to reach this position. If the user waits
4 seconds after this the BGB-250 checks and indicates the set position again, i.e. the LED will flash another 7 times.
All settings that are made are memorised by the BGB-250 if it is de-energised.
over
reset
12V
16.0V
15.6V
24V
32.0V
31.2V
#
12V
under reset
24V
under reset
1
9.5V 11.5V
19.0V 23.0V
2
10.0V 11.5V
20.0V 23.0V
3
10.0V 13.2V
20.0V 26.4V
4*
10.5V 12.0V
21.0V 24.0V
5
10.5V 12.8V
21.0V 25.6V
6
11.25V 13.25V
22.5V 26.5V
7
11.5V 12.8V
23.0V 25.6V
8
11.5V 13.8V
23.0V 27.6V
9
11.8V 12.8V
23.6V 25.6V
10
12.8V 13.2V
25.6V 26.8V
Table 1: Overvoltage.
*) factory settings
Table 2: Programmable undervoltage and reset
voltage values.
