Low voltage cut-off setting
The low voltage setting can be adjusted by the
dip switches according to the table below. The
voltage guard is permanently switched on when
DIP switches 1, 2 and 3 are on. In this case the
low voltage protection is disabled. The voltage
guard works only between 8VDC and 31VDC. Use
DIP switch 4 to enable or disable the internal
buzzer.
Power up
When the power is supplied to the voltage guard
an internal self-test is done. At this moment the
voltage guard determines the nominal system
voltage. In this situation the status LED will flash
once red-green and a beep can be heard.
At a power up voltage below 16V, the voltage
guard sets itself to 12V system voltage. If the
power up voltage is higher than 16V, the voltage
guard sets itself to 24V system voltage.
Using the voltage guard as a main switch
If a panel switch is connected according to the
drawing, the main switch function can be used.
The output is turned off when the switch is
closed. The status LED is off and flashes four
times a minute. The normal voltage guard
function is activated when the switch is opened.
Normally in this case the status led is lid green
and the output is switched on. Depending on the
battery voltage the led status can be different.
Without using the switch input, the voltage guard
will just function as a low voltage protection for
your battery.
Explanation status LED
Green : the battery voltage is ok. Output is
switched on.
Green blinking : flashing four times per minute,
optional panel switch is closed and the
consumers are switched off.
Orange : the battery voltage is lower than the set
prealarm.
Red blinking : Output is switched off because of
high or low voltage or overload.
Buzzer
The internal buzzer sounds by variable intervals
before reaching the shut off point. The interval
between the sounds will be shorter with every
repetition. Pauses between alarm pulses: 600s -
300 s - 150s - 75s - 38s - 19s - 9s.
Technical specifications
Rated current (constant) : 70 A
Max current (10s @ 20C°) : 140 A
Voltage : 12 and 24 VDC
Input voltage range : 8 - 31 VDC
Consumption : > 2mA (LED Off)
Presentation : Plastic housing with external
fixings – IP51
Connection : on threaded roads
Dimensions (l x h x e) : 100 x 89.2 x 43 mm
Weight : 0.21 Kg
Operating temperature : from -10°C to +60°C
Storage temperature : from -20°C to +85°C
12V low voltage adjustment : 9 - 12 VDC
12V overvoltage threshold : 15.5 VDC
24V Low voltage adjustment : 18 - 24 VDC
24V overvoltage threshold : 31 VDC
