50 ms sampling, self-tuning, 1/4 DIN
The PXF9APR2-FBMA1: That 50 ms sampling rate means it catches fast thermal events—like a weld head overshoot or a thin-film oven zone—that a 100 ms or 200 ms controller would average out or miss entirely. The self-tuning algorithm auto-adjusts PID parameters during ramp-up, so you don't need to babysit the loop with a Ziegler-Nichols chart on commissioning day.
Panel fit and field swap
1/4 DIN (96 x 96 mm) cutout is the standard panel-mount footprint—same as every other 1/4 DIN controller on the rack, so it drops into an existing hole without re-punching the panel. If you're swapping a failed unit on a line, the 96 mm square face fits the same panel cutout; just pull the old one, slide this in, and re-terminate the screw terminals.