50 ms sampling and self-tuning loop
The PXF9ACR2-FV1A1: The self-tuning algorithm sets PID gains on first power-up; the 50 ms scan rate means the output updates every two line cycles at 50 Hz, giving the SSR or phase-angle fired triac a clean update window without aliasing the 60 Hz mains.
Panel cutout and field wiring
1/4 DIN (96 x 96mm) panel cutout is the standard Japanese and European footprint — the controller slides into the same 92x92 mm hole as a Fuji PXR or Omron E5EC without re-cutting the panel. The 50 ms sampling speed is not just a loop-rate spec: it also determines how fast the alarm outputs respond to a thermocouple break or a runaway heater — a 50 ms detection window catches the fault before the next zero-cross of a 60 Hz heater cycle.