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I am making a circuit to control the opening and closing of a small gate with two push buttons and two limit switches. The gate open and close functionality already works, but I want to add a general emergency stop button. I can't find a way to put a normal closed push button to disengage the two relays and brake the motor, I have tried putting it in different places in the circuit without success.

This is the circuit:

enter image description here

Any other comments on the circuit are also appreciated.

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    \$\begingroup\$ Your NC button would need to disconnect power to all the parts of the circuit. \$\endgroup\$
    – Finbarr
    Commented Mar 24, 2023 at 14:45
  • \$\begingroup\$ What are the NC buttons in circuit for? \$\endgroup\$
    – Andy aka
    Commented Mar 24, 2023 at 14:45
  • \$\begingroup\$ @Andyaka I'm assuming those are the limit switches \$\endgroup\$
    – Finbarr
    Commented Mar 24, 2023 at 14:47
  • \$\begingroup\$ The OP should ideally answer that question @Finbarr \$\endgroup\$
    – Andy aka
    Commented Mar 24, 2023 at 14:48
  • \$\begingroup\$ The nc buttons are the limit switches. \$\endgroup\$ Commented Mar 24, 2023 at 14:55

2 Answers 2

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Consider something like the following:

schematic

simulate this circuit – Schematic created using CircuitLab

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  • \$\begingroup\$ It worked great, thank you very much! \$\endgroup\$ Commented Mar 24, 2023 at 15:45
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You could connect a normally closed button between the two relay coils and ground. This would de-energize the coils and connect both motor terminals to ground, making it brake.

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