Intrinsically safe sensor for process automation technology

An intrinsically safe field device for process automation technology, comprising:

• a sensor element for the detection of a measurand;
• a secondary coil configured to transmit and receive data from a primary coil and further configured to receive power from the primary coil, wherein the secondary coil includes a first connection and a second connection;
• a second coupling body that is designed to be complementary to a first coupling body, wherein the second coupling body includes the secondary coil;
• and
• a circuit assembly that is arranged downstream of the secondary coil, wherein the circuit assembly includes:
• a first Zener diode, a second Zener diode, and a third Zener diode, wherein an anode of the first Zener diode, an anode of the second Zener diode, and an anode of the third Zener diode are connected to the second connection of the secondary coil;
• a first rectifier diode, a second rectifier diode, and a third rectifier diode, wherein a cathode of the first rectifier diode is connected to a cathode of the first Zener diode, a cathode of the second rectifier diode is connected with a cathode of the second Zener diode, and a cathode of the third rectifier diode is connected with a cathode of the third Zener diode, and wherein the anode of the first rectifier diode, the anode of the second rectifier diode, and anode of the third rectifier diode are connected to the first connection of the secondary coil;
• a fourth Zener diode, a fifth Zener diode, and a sixth Zener diode, wherein an anode of the fourth Zener diode, an anode of the fifth Zener diode, and an anode of the sixth Zener diode are connected to the first connection of the secondary coil;
• and
• a fourth rectifier diode, a fifth rectifier diode, and a sixth rectifier diode, wherein a cathode of the fourth rectifier diode is connected to a cathode of the fourth Zener diode, a cathode of the fifth rectifier diode is connected with a cathode of the fifth Zener diode, and a cathode of the sixth rectifier diode is connected with a cathode of the sixth Zener diode, wherein an anode of the fourth rectifier diode, an anode of the fifth rectifier diode, and an anode of the sixth rectifier diode are connected to the second connection of the secondary coil.

A sensor arrangement for process automation, comprising:

• a connection element;
• and
• a field device, including:
• a sensor element for the detection of a measurand;
• a secondary coil configured to transmit and receive data from a primary coil and further configured to receive power from the primary coil, wherein the secondary coil includes a first connection and a second connection;
• a second coupling body that is designed to be complementary to a first coupling body, wherein the second coupling body includes the secondary coil;
• and
• a circuit assembly that is arranged downstream of the secondary coil, wherein the circuit assembly includes:
• a first Zener diode, a second Zener diode, and a third Zener diode, wherein an anode of the first Zener diode, an anode of the second Zener diode, and an anode of the third Zener diode are connected to the second connection of the secondary coil;
• a first rectifier diode, a second rectifier diode, and a third rectifier diode, wherein a cathode of the first rectifier diode is connected to a cathode of the first Zener diode, a cathode of the second rectifier diode is connected with a cathode of the second Zener diode, and a cathode of the third rectifier diode is connected with a cathode of the third Zener diode, and wherein the anode of the first rectifier diode, the anode of the second rectifier diode, and anode of the third rectifier diode are connected to the first connection of the secondary coil;
• a fourth Zener diode, a fifth Zener diode, and a sixth Zener diode, wherein an anode of the fourth Zener diode, an anode of the fifth Zener diode, and an anode of the sixth Zener diode are connected to the first connection of the secondary coil;
• and
• a fourth rectifier diode, a fifth rectifier diode, and a sixth rectifier diode, wherein a cathode of the fourth rectifier diode is connected to a cathode of the fourth Zener diode, a cathode of the fifth rectifier diode is connected with a cathode of the fifth Zener diode, and a cathode of the sixth rectifier diode is connected with a cathode of the sixth Zener diode, wherein an anode of the fourth rectifier diode, an anode of the fifth rectifier diode, and an anode of the sixth rectifier diode are connected to the second connection of the secondary coil.