HZ172A605 by Danaher

The HZ172A605 mechanical preset counter is produced by Danaher for the Timers and Controllers series. It mounts on a panel front and triggers its relay output after the programmed number of machine cycles, supporting batch control, indexing, or dwell timing functions in automated equipment. A chrome-plated bezel protects the dial opening and aligns with standard instrument finishes. The frame dimensions allow integration into compact control stations without obstructing adjacent devices.

The counter operates directly from a nominal 120 VAC mains source, so no auxiliary transformer is needed. During startup, the motor draws 26 VA, and once it reaches operating speed, the clutch sustains operation with only 10.5 VA, limiting continuous heat generation. The electromechanical clutch engages in 50 ms, which indicates how quickly the register advances after each control pulse. Form C relay contacts are rated for 10 A at 120 VAC, enabling the device to switch solenoids or small motor loads without an external interposing relay. The signal input must remain high for 40 ms and then low for 80 ms to ensure accurate incrementing, values that coordinate with typical PLC output timing.

The mechanical register accepts up to 40 counts before actuating the output, and the setpoint can be reduced to a single count for single-stroke applications. At a maximum input frequency of 500 counts/min, the unit keeps pace with moderate-speed indexing machinery. After completion, the cam resets in up to 500 ms, preparing the device for the next cycle without excessive downtime. The enclosure measures 107.95 mm in height, extends 146.05 mm behind the panel, and spans 96.82 mm across the bezel. These measurements allow the counter to fit into shallow cabinets while keeping the display visible from the front of the control panel.