Connection equipment and a field device control system

A field device control system for controlling a field device from a control system via a connection equipment, and providing an electric power signal to the connection equipment comprising:

• the control system comprising:
• first processing circuitry configured to generate a communication signal including an field device reference of the field device;
• and
• a first transmitter/receiver configured to transmit the communication signal;
• and
• the connection equipment comprising:
• a memory configured to store a table for associating the field device reference of the field device with an identification of a terminal port;
• a first isolator circuit configured to receive the communication signal from the control system via a second transmitter/receiver, to split the received communication signal and an electric power signal to be provided to the field device, and to transmit the received communication signal to second processing circuitry and the electric power signal to an electric power adjustor circuit;
• the second processing circuitry configured to determine the terminal port corresponding to the field device reference included in the communication signal received from the control system based on the table, and to instruct the second transmitter/receiver to transmit the communication signal to the determined terminal port by transmitting the communication signal to a second isolation circuit;
• the second transmitter/receiver configured to transmit the received communication signal received from the second processor to the field device via the determined terminal port based on the instruction by the second processor;
• the electric power adjustor circuit configured to adjust a level of the electric power signal to be provided to the field device via the determined terminal port based on an input level of the electric power signal received using a cable via the first isolator circuit, and to transmit the electric power signal to the second isolator circuit;
• and
• the second isolator circuit configured to combine the communication signal received from the second processing circuitry and the electric power signal received from the electric power adjustor circuit, and to electrically isolate the communication signal to be transmitted to the field device via the determined terminal port and the electric power signal to be provided to the field device at the determined terminal port, from the other terminal ports.

A connection equipment connected to a field device via one of a plurality of terminal ports, the field device controlled by a control system connected to the connection equipment, the connection equipment comprising:

• a transmitter/receiver;
• a first isolator circuit configured to receive a communication signal from the control system via the transmitter/receiver, to split the received communication signal and an electric power signal to be provided to the field device, and to transmit the received communication signal to processing circuitry and the electric power signal to an electric power adjustor circuit;
• the processing circuitry configured to:
• receive the communication signal from the control system via the first isolator circuit;
• resolve a relationship of a field device reference of the field device and an identification of the terminal port to which the field device is connected, by referring to a table stored in a memory of the connection equipment;
• determine the terminal port to which the communication signal from the control system is to be transmitted based on the field device reference included in the communication signal;
• and
• convert a protocol applied to the communication signal between the control system and the connection equipment into a protocol applied to the communication signal between the connection equipment and the field device;
• the electric power adjustor circuit configured to adjust a level of the electric power signal to be provided to the field device via the determined terminal port based on an input level of the electric power signal received from the control system using a cable via the first isolator circuit, and to transmit the electric power signal to the second isolator circuit;
• and
• the second isolator circuit configured to combine the communication signal received from the processing circuitry and the electric power signal received from the electric power adjustor circuit, and to electrically isolate the communication signal to be transmitted to the field device via the determined terminal port and an electric power signal to be provided to the field device via the determined terminal port, from rest of the plurality of terminal ports.