Method of fast switching between devices

A method for operating an industrial safety device of a single-wire safety circuit, comprising:

• determining, by a microcontroller of an industrial safety device, whether the industrial safety device detects a safe status;
• comparing, by the microcontroller, a pulse pattern carried by a safety signal received on an input terminal of the industrial safety device with a defined pulse pattern;
• in response to determining that the pulse pattern matches the defined pulse pattern based on the comparing and that the industrial safety device detects the safe status, closing, by the microcontroller, an electronic switch that electrically connects the input terminal to an output terminal of the industrial safety device;
• and
• in response to determining that the pulse pattern does not match the defined pulse pattern based on the comparing or that the industrial device does not detect the safe status, opening, by the microcontroller, the electronic switch.

A non-transitory computer-readable medium having stored thereon instructions that, in response to execution, cause an industrial safety device comprising an input terminal, an output terminal, an electronic switch that connects the input terminal to the output terminal, and a processor connected in parallel with the electronic switch to perform operations, the operations comprising:

• confirming that a safety signal received on the input terminal of the industrial safety device carries a pulse pattern corresponding to a defined pulse pattern;
• in response to the confirming and a determination that a safety function of the industrial safety device is valid, maintaining the electronic switch in a closed position that permits the safety signal to pass from the input terminal to the output terminal;
• and
• in response in response to determining that the safety signal does not carry the pulse pattern corresponding to the defined pulse pattern or that the safety function of the industrial safety device is not valid, instructing the electronic switch to switch to an open position that electrically disconnects the input terminal from the output terminal.