Abstract: In a power supply apparatus, a first relay unit relays power inputted from an outside of the apparatus, wherein the power having only one type of power specification. A second relay unit relays power inputted from the outside of the apparatus, wherein the power having a plurality of types of power specification is selectively inputted to the second relay unit. A module, connected to the apparatus, is activated responsively to the power supplied from the first relay unit. Information is acquired from the activated module, information showing a predetermined specification of the power supplied to the first relay unit. The second relay unit supplies the module with the power outputted from the second relay unit when a specification of the power inputted to the second relay unit corresponds to the predetermined specification, thereby enabling the second relay unit to relay the power to an electric load.

Abstract: The present disclosure provides a functional safety module for industrial devices, the functional safety module being connected between the industrial devices to manage safety according to a state of the industrial devices. The functional safety module may include a first controller and a second controller each configured to execute a common predetermined operation command including operation commands. The first controller is configured to output digital signals, and sequentially convert the digital signals into analog voltages. The second controller is configured to receive the analog voltages, sequentially converts the analog voltages, and outputs the digital signals, and determine whether the first controller is normal.

Abstract: The present disclosure provides a functional safety module for industrial devices, the functional safety module being connected between the industrial devices to manage safety according to a state of the industrial devices. The functional safety module may include a first controller and a second controller each configured to execute a common predetermined operation command including operation commands. The first controller is configured to output digital signals, and sequentially convert the digital signals into analog voltages. The second controller is configured to receive the analog voltages, sequentially converts the analog voltages, and outputs the digital signals, and determine whether the first controller is normal.