Foxboro 556-10-30 Square Root Computer is a process-control module that performs square-root calculations on a 3-15 psi pneumatic signal (WL12-1). It is used within Foxboro automation systems to generate a square-rooted signal for flow or rate calculations in pneumatic control loops. The 556-10-30 designation identifies the specific unit for reference in maintenance, replacements, or system integration in legacy installations.
