Industrial process field equipment with low-power optical isolator

The utility model discloses industrial process control field equipment which comprises a process variable transducer configured to sense or control a process variable, wherein a field equipment circuit is connected to the process variable transducer, is configured to transmit information related to the process variable to another position, and comprises an optical isolator; the optical isolator is provided with a transmission circuit on the first lateral surface of a current isolator; the transmission circuit is configured to transmit an optical signal which is enabled and disabled by a pulse across the isolator; a receiving circuit is positioned on the second lateral surface of the current isolator, and is configured to receive the optical signal by virtue of an optical sensor; the optical sensor enters an enabled state when receiving the pulse, otherwise is in a disabled state; the receiving circuit provides auxiliary lateral output based on the received optical signal; when the optical sensor is in the dis