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Answer :
Final answer:
The hard-wired safety seal-in relay circuit is known as an MCR (Motor Control Relay) which maintains power to the outputs using pushbuttons. This relay is crucial for managing devices like motors by latching the power state. Understanding the components—relay, pushbutton, and output device—is essential in designing such circuits.
Explanation:
Understanding Relay Circuits
A hard-wired safety seal-in relay circuit that turns the power on and off to the outputs using pushbuttons is commonly referred to as an MCR, which stands for Motor Control Relay.
The function of this circuit is to control a device such as a motor by using a relay that can maintain its state even after the initial input signal is removed, hence 'seal-in'. When a pushbutton is pressed, it energizes the relay, allowing current to flow to the output device. Once the relay is energized, it latches, keeping the output on until a reset or turn-off mechanism is triggered.
Key Components and Operation
- Relay: Acts as a switch controlled by an input signal.
- Pushbutton: Used to activate the relay and provide the control input.
- Output Device: The device that gets powered (e.g., motor, light) when the relay is activated.
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