HG109A6 Danaher
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The Danaher HG109A6 is part of the Timers and Controllers series and features a synchronous unidirectional motor with a plug-in case housing. It operates at 120 VAC and 60 Hz, offering 2 SPDT contact form outputs rated at 10 amps. This timer has a repeat accuracy of 0.5 percent of dial and a mechanical life of 10 million operations.
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Product Description:
The HG109A6 is an industrial timer produced by Danaher within the Timers and Controllers series. Classified as an electromechanical repeat-cycle unit, it drives two independent output circuits that alternate between energized and de-energized states according to front-panel settings. By using a synchronous unidirectional motor and cam stack, the device delivers predictable timing for conveyors, batch fillers, or indexing tables. Its mechanical contacts suit panel layouts where physical contact isolation is preferred for switched loads.
Nominal power is drawn from 120 VAC mains at 60 Hz, and the synchronous motor consumes only 2.5 VA while driving the cam. At the completion of each cycle, the dial returns to its reference point with a repeat accuracy of 0.5% of the dial range, so process intervals remain tightly aligned even during extended operation. Two Form C relay stages switch up to 10 A at 120 VAC, permitting direct control of solenoid valves, motor starters, or indicator lamps without an interposing contactor. Separate ON and OFF scales allow unequal dwell times to be set for applications such as washdown pauses or feed strokes. The independent scales also allow each portion of the cycle to be adjusted for the operating sequence of the connected equipment.
Short-interval overlap between the ON and OFF segments is limited to 1.5% of the total cycle, preventing simultaneous conduction that could interfere with downstream control logic. Relay endurance supports 250,000 operations under rated load, while the mechanical cam mechanism is intended for 10,000,000 operations, reducing maintenance demands in systems that run continuously. The unit mounts in a plug-in case, which allows front-panel insertion without disturbing the fixed base wiring. This mounting arrangement also keeps the terminal connections at the base while leaving the timer body accessible from the front of the enclosure.
