SPC Servo Position Controller

The Servo Position Controller (SPC) is a servo-valve driver that accepts a DeviceNet or 4-20 mA based position demand signal from a system controller, and accurately positions proportional or integrating servo-valves. The SPC has the required accuracy, responsiveness, and redundancy required for steam or gas turbine fuel valve control.
For valve position sensing, the SPC accepts feedback signals from one or two (redundant) ac devices or one dc device.
A Windows based software program is used to configure the SPC, adjust tunables, and monitor parameters via a personal computer. For ease of service, SPC configurations can be done while connected or disconnected to the unit. Once a configuration has been created, this program allows configurations to be uploaded and downloaded to other SPCs as desired.
The SPC’s position feedback circuit includes integral excitation and signalconditioning circuitry for LVDT and RVDT based position sensing devices.