ATC 353A346C10UX Digital Programmable Timer

The ATC 353A346C10UX is a Shawnee II IC digital programmable timer in the 353 series, designed for panel-mount installation in industrial control panels. This timer uses a line-frequency clock (50 or 60 Hz) as its time base, with a ROM that holds programmable timing values and a comparator that continuously evaluates the clock against the ROM outputs to generate a controlled timing sequence. Programming is accomplished with digital setting wheels, enabling precise interval or delay settings without external counters. The 353 series supports multiple operating modes, including Delayed Start, Interval timing, and a Repeat Cycle Pulse Generator, making it suitable for sequencing, batch timing, and automated process steps. A hallmark of Shawnee II timing devices is repeatable accuracy, with typical timing stability on the order of about 10 milliseconds, which helps maintain consistent cycle timing in production lines. The 353A346C10UX designation identifies a specific variant within the 353 Shawnee II lineup, aligning with documented 72-mm-wide panel-mounted timers known for compact installation without sacrificing timing precision. In practice, engineers leverage this family to coordinate machine cycles, synchronize conveyors, or control process steps that require deterministic delays or recurring pulses, all in a compact form factor that fits standard control panels. This model’s combination of a digital wheel-programmed ROM, line-frequency time base, and reliable repeatable timing makes it a focused solution for industrial timers where precise, repeatable timing is critical.