The SP7-1* smart positioner can control any valve that is actuated by a linear or rotary pneumatic actuator that conforms with NAMUR. It guarantees an exact proportionality between the stroke of the valve and the value of the electrical input signal (mA) into the positioner.
The SP7-1* has a cast aluminium housing that is also treated for outdoor installation. The unit can be mounted onto pneumatic actuators either rotary -57 to 57° or linear -28 to 28°. The positioner can be supplied without a mounting kit or with a kit for rotary or linear actuators, the type must be specified when ordering.
The positioner can be supplied without a pressure gauge block or with a pressure gauge block, the type must be specified when ordering. The positioner is supplied for a control signal in mA and for an air supply pressure from 1.4 to 6 bar (20 to 87 psi).
The SP7-1* positioner can also be used to reverse the action of the Control Valve control signal.
The positioner has a local communication interface (LCI) as standard in the SP7-10. Additionally, a ‘HART® communication’ option for communication via the 20 mA signal is available. Both communications are based on the HART® Protocol. Alternatively, HART®5 or HART®7 are available.
Other available options are the SP7-11 with a PROFIBUS PA module or the SP7-12 with FOUNDATION Fieldbus module. In addition to its input for the analog position set point, the positioner is equipped with a digital input which can be used to activate control system functions in the device. A digital output allows you to output collective messages (alarms/faults).