Product Description:

The HG101A605 is a cam-driven industrial timer produced by Danaher for the Timers and Controllers series. It inserts a repeatable delay into power or control circuits, allowing conveyors, test fixtures, and batch processes to run for predetermined intervals without a microprocessor. This electromechanical design provides a simple solution where programmable logic is unnecessary or already fully utilized. By integrating directly with relay coils or starter circuits, it contributes predictable sequencing to automation panels while maintaining isolation between the low-power timing mechanism and the controlled load.

The device operates on a nominal supply of 120 VAC at 60 Hz, drawing only 2.5 VA so it can share auxiliary power with lamps or pilot devices. A single-turn knob spans a full cycle of 60 seconds, and the scale permits a minimum setting of 1 second for short impulses. Once adjusted, the elapsed time has a repeatability of 0.5% of the dial setting, making the unit suitable for synchronized indexing or dwell control. Overlap between consecutive cycles may be limited to 1.5% of the total cycle, helping prevent conflicting actuators from being energized simultaneously. Contact repeat accuracy is aided by the internal Geneva mechanism. Long-term stability is supported by low-mass gearing that reduces mechanical wear during repeated operation.

Load switching is accomplished through two SPDT contacts rated at 10 A at 120 VAC for resistive circuits. The cam plate can be set for make-before-break or break-before-make action, allowing coordination with interlocks or indicator lamps. At the rated current, each contact is expected to withstand 250,000 operations, while the timer’s drive train has a mechanical endurance of 10,000,000 operations. Reliable cycle timing is maintained at ambient temperatures from -20 to 140 °F, eliminating the need for enclosure heaters or coolers in most workshops.