First, the module Scope:
12V30A battery against over-discharge protection board, simple and practical, both sound and light alarm,Meanwhile versatilityIt can be said for all the load.The module with alarm delay, is the delay in the battery voltage 5-20 seconds if the battery is still under voltage, the module will alarm and disconnect the output, so you can avoid the large current load start battery voltage fluctuation error action.

Example 1:As the motor load at startup, the battery voltage fluctuates little, this can be used with delay, delay 5-20 seconds enough to restore stability in the value of the battery voltage.

Example 2:Car just started, the car will flash it, but also because the starting current is relatively large, the battery voltage fluctuations, and this can be used with delay, delay When 5-20 seconds, enough to let the battery voltage is restored.

This module alarm for the self-locking type:
When the battery voltage 5-20 seconds, the module automatically turn off the output,When the battery voltage to rise above the set value of their own, are not connected to the load again, the need to manually disconnect the input modules before they can be restarted,Pro who can own battery positive and module positive input string a normally closed switch can easily control.

Second, a brief description:

1, board size: 5.02CM * 7.03CM
Fixing hole diameter: 3MM
Fixing holes distance: 6.4 * 4.3CM
1, the main chip: LM358;
2, suitable for 12V battery when the battery voltage is normal, "normal" panel indicator lights, the output is turned on; when the battery discharge occurred (below about 10.4V), the board will automatically disconnect the battery output, "less pressure "indicator lights up and the buzzer to call, to achieve sound and light alarm, in order to achieve master battery discharge status, prevent over-discharge the battery, damage the battery;

3, its power consumption:
Static: since consumption is about 12 mA (battery voltage is normal);
News: since consumption is about 100 mA (battery undervoltage);
Three Advantages:
1, with sound and light alarm, there is no protective effect is straightforward;
2, versatility;
3, the board 30A maximum current allowed to pass for most of the 12V battery;
30A refers to the process by the relay contacts load current, not the battery current (capacity).
Wiring in the following figure (input without reversal protection, before wiring, distinguish between positive and negative):

We adjusted the factory brown-out voltage is about 10.6V (input 12V, sampling test point voltage of 6.5-6.6V),Pro undervoltage protection can also adjust their values, clockwise adjusted to increase voltage of the voltage value, that adjustment potentiometer clockwise, will increase the sensitivity of the module, but do not adjust the time adjustment disorder, the proposed pro voltmeter when it is transferred, or adjustment disorder harder.
This module is 12V battery protection module-specific, not when the other type of power.

Package:
1X 12V battery against controller