An integrated controller configured to operate in a field includes a network interface module, one or more function modules, and an output module. The network interface module is configured to receive, from a remote host via a communication link, a setpoint for a process variable. The one or more function modules are configured to (i) receive a measurement of a process variable from a field device and (ii) execute logic for a control loop including the field device based at least in part on the measurement of the process variable and the setpoint for the process variable, to generate an output signal independently of the remote host, where the output signal is for controlling the field device. The output module is configured to directly apply the generated output signal to the field device.

A field instrument includes: a plurality of sensors; a converter that acquires measurement results of the sensors and converts the measurement results into measurement information. The measurement information is physical quantities; and a processor that outputs, to a control target instrument connected to the field instrument, a control instruction that controls the control target instrument based on the measurement information.

A field device for a process plant, may include a power distributing data switch having an electrical primary connection to consume power at a first power level higher than 10W, and at least two electrical secondary connections for combined data communication and power transfer at a second power level of lower than 10W per secondary connection. The field device may also include a housing to accommodate electrical components safe from dust and/or water, which forms a first housing compartment fitted for pressure proof enclosure of electrical components in an environment with explosive or flammable atmosphere and which accommodates the primary connection. The secondary connections may be arranged outside a pressure proof enclosure and outside the first housing compartment. The device may include a protective bridge to isolate leads out of the first housing compartment to connect the primary connection to the secondary connections.

A remotely controlled valve includes an electric motor and transmission for moving a valve stem or valve actuator. The operation of the motor may be controlled by a first input for power and analog signals. The valve is also provided with a programmable logic controller and a wireless module for receiving wireless control signals for controlling the operation of the motor which moves the valve stem or a valve actuator in a desired manner.

A remotely controlled valve includes an electric motor and transmission for moving a valve stem or valve actuator. The operation of the motor may be controlled by a first input for power and analog signals. The valve is also provided with a programmable logic controller and a wireless module for receiving wireless control signals for controlling the operation of the motor which moves the valve stem or a valve actuator in a desired manner.