The master station start button is placed in which relation to the start push button in the station logic?

The master station start button is placed in which relation to the start push button in the station logic?

• A. In parallel
• B. In Series
• C. In a separate circuit
• D. Not connected

Answer: (B)

Placing the master start button in series with the local start push button creates an interlock: the circuit can only be completed to energize the starter when the master control is ON and the start button is pressed. This ensures the station can be started only with the master enabled, adding a safety layer to prevent accidental starts. If the master button were in parallel, pressing the start button could energize the circuit even with the master off, bypassing the enable. A separate circuit or no connection would isolate or remove the enabling function, so starting wouldn’t depend on the master control at all.

Placing the master start button in series with the local start push button creates an interlock: the circuit can only be completed to energize the starter when the master control is ON and the start button is pressed. This ensures the station can be started only with the master enabled, adding a safety layer to prevent accidental starts. If the master button were in parallel, pressing the start button could energize the circuit even with the master off, bypassing the enable. A separate circuit or no connection would isolate or remove the enabling function, so starting wouldn’t depend on the master control at all.