HG101A6 by Danaher

Danaher supplies the HG101A6 multifunction timer as a member of its Timers and Controllers series. The device uses a synchronous unidirectional motor to turn an internal cam assembly, producing precise switching sequences for machine indexing, batch processing, or lighting control in industrial automation. Its standard plug-in socket allows the timer to be removed without disturbing the existing wiring. Two independent front dials let operators assign separate on and off intervals without external programming, making the unit suitable for standalone cycle management on legacy panels.

Input power is 120 VAC at 60 Hz, and internal consumption stays at 2.5 VA, so the timer adds minimal load to small control transformers. Its two SPDT outputs are rated for 10 A at 120 VAC with a resistive load, enabling direct control of heaters, solenoids, or motor starters without an interposing relay. Repeatability across successive cycles remains within 0.5% of the dial setting, resulting from a synchronous drive that locks timing accuracy to the mains frequency. The repeat-cycle operation automatically starts another timing cycle after the previous cycle ends, supporting continuous processes. Silver-alloy contact tips moderate wear and provide a switch life of 250,000 operations at the full rating.

Each cam revolution produces a complete cycle in 60 seconds, and the overlap between successive contacts is restricted to 1.5% of the total cycle, allowing tight coordination of sequential machine functions. The timer has two circuits that support staggered actions on separate loads through the shared shaft. Its mechanical life reaches 10,000,000 operations, indicating the durability of the internal gearing and cam followers. Stainless steel guide pins retain alignment under vibration. The timer can be extracted from the front panel for preventive service without disconnecting the socket wiring.