The output channels provide a self-protection function in order to avoid damages to the device under fault conditions in the load circuit as far as possible. Each load current of all 4 channels per channel root is monitored. The protected range begins when the value is higher than approx. 0.6 A per channel. It may happen, that the channel is already switched-off at this value. This means, that all output signals of this root are set to logical 0.

In this case, status signals report the error status to the iba applications. The errors can be reset by the application, but only when the error does not physically exist any longer.