Here are some examples of things you CAN directly switch on and off using the output on the Micro
Commander:
•
Gate motors and any other motor less than 500W
•
Mains Lights (energy savers, incandescents, halogens) (maximum 750W)
Here are some examples of things that you can
NOT
directly switch on and off using the output on
the Micro Commander:
•
Ovens, Heaters, kettles
•
Pumps and motors above 500W
Please note:
Keep in mind that if required, the above loads can easily be switched on and off using
an externally connected relay or contactor.
5.10. Battery Input
The Micro Commander provides connections for an external rechargeable 12V battery. Under normal
circumstances, the Micro Commander will trickle-charge the battery at a current of about 60mA. In
the case of a power failure, the Micro Commander then starts drawing power from the battery to
continue operating.
In the case of a power failure, the Micro Commander can continue operating from the external
battery. The unit can be configured to perform certain tasks (like sending a warning SMS) if the
battery voltage falls below a certain point, and can also perform tasks in the case of a power
failure. (Like sending an SMS and switching on emergency lighting)
In cases where the Micro Commander is used in conjunction with a large system with its own battery
(such as UPS systems), the battery terminals of the Micro Commander can be safely connected to
the large (12V) battery, and the Micro Commander can then monitor the battery voltage for you
(only while power is NOT supplied to the power input connector).
Also, in cases where the user may want to connect other hardware directly to the battery, be aware
that this will probably drain the battery, since the charging current from the Micro Commander is so
low. Other hardware should rather be connected to the power terminals provided at the inputs.
(See section 5.8 for more information on this)
.
Internal to the Micro Commander, the Battery terminal is wired with a 47ohm resistor between the +
Batt terminal and the positive power supplied to the Micro Commander. There is a diode in parallel
with this resistor (cathode facing to the battery) to allow the Micro Commander to draw power from
the battery under power-fail conditions.
A resettable fuse has now also been added to give the Battery terminal added protection against
voltage spikes and short circuits.
Suitable batteries are available from
Polygon Technologies
.
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