Chain logic

Generally, these interlocks are used for the preparatory work before starting a pump; it’s necessary to press the reset button first, confirm everything is in order, and then the green light indicating that it’s safe to start will turn on. This applies to compressors or high-pressure feed pumps – before starting, one needs to check that the oil pressure is adequate, that there is no excessive vibration, that the machine temperature is within normal limits, and that any pressure relief mechanisms are properly reset. Once everything meets the requirements, the reset button is pressed, confirmation is given, and then the light turns on, allowing the pump to be started. As for the difference mentioned by the original poster, I think the reset process involves pressing the reset button once all interlocks have been satisfied, ensuring that the instrument panel’s SIS system has been reset successfully, and pressing the confirmation button as well. This signals to the electrical components that everything is fine, that there are no issues with the high-pressure pumps, transformers, or related circuits, including proper functioning of the surge protection systems. Only when all these conditions are met will the green light turn on; if any issue exists, the confirmation will not be granted. Please forgive me if I’m incorrect

Here, when you click the reset button, a confirmation button appears; but I guess it makes no difference