.. currentmodule:: omc048
.. _omc048.power_supply:


class Power Supply
==================

Control the power supply ports by enabling and disabling. 

.. attention::
    Attention, the supply voltage of **port number 4** on all OMC-048 loggers with **BL: 1.03B0** and upwards will be 5V! All other OMC-048 still have four 12V supply ports.

Constructor
-----------

.. class:: omc048.power_supply(id: integer)

   Create a power supply object associated with a power supply.

   - ``id`` is the power supply number 1 to 4, corresponding to pin 7 to 10.


Methods
-------

.. method:: power_supply.set(state: integer)
   
   Set the power supply on or off.

   - ``state`` is 1 or 0, corresponding to on and off.

.. method:: power_supply.on()

   Enable the power supply to the port.

.. method:: power_supply.off()

   Disable the power supply to the port.

.. method:: power_supply.toggle()

   Switch the power supply state from the current to the other state. 
   Turning it on when it was off and off when it was on.


Example
-------

The following example enables power supply 1 to 4, turns supply 2 off after 5 seconds and the others after 10. ::

    import omc048
    import time
    
    s1 = omc048.power_supply(1)
    s2 = omc048.power_supply(2)
    s3 = omc048.power_supply(3)
    s4 = omc048.power_supply(4)

    s1.on()
    s2.on()
    s3.on()
    s4.on()

    time.sleep(5)
    s2.off()

    time.sleep(5)
    s1.off()
    s3.off()
    s4.off()