When the O relay is energized, what voltage will be on A1 and A2 respectively?

When the O relay is energized, it typically creates a specific voltage condition at the contacts that influence the voltages at terminals A1 and A2. In the context of elevator control systems, when the O relay is activated, it may reverse the polarity of the voltages at these terminals.

In this specific case, terminal A1 will be at a negative voltage and terminal A2 will receive a positive voltage. This is relevant to how relay circuits are designed to operate, specifically in controlling the direction or state of the elevator system. The negative and positive voltages signify the relay's engagement clearly, allowing for effective control of the elevator's door operation or motor functions.

Understanding the operation of relays and the resulting voltage changes is crucial for troubleshooting and ensuring that elevator systems operate safely and efficiently.