HP50A6 Danaher
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The Danaher HP50A6 is a timer from the Timers and Controllers series with a supply voltage of 120 VAC and a supply frequency of 60 Hz. It offers a max time setting of 30 seconds, a minimum time setting of 1 second, and a repeat accuracy of plus or minus 0.15 seconds. The device has an average contact life of 250,000 operations and weighs 2 pounds 14 ounces.
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Product Description:
The HP50A6 is an electromechanical timer produced by Danaher within the Timers and Controllers series. In automated equipment, it generates a repeatable delay between an electrical signal and a mechanical output, allowing conveyors, heaters, or sequencing relays to operate in a set temporal order. The unit engages an internal clutch-driven cam to open or close contacts after the selected interval, so machine cycles can be synchronized without software logic or high-speed electronics.
The timing window extends from a minimum of 1 second to a maximum of 30 seconds, allowing short indexing pauses or longer dwell periods with the same device. Each rotation of the dial is divided into 1/2-second graduations, providing clear visual feedback while fine adjustments are made with a vernier pointer. Once set, the mechanism repeats successive cycles within ±0.15 second, helping parallel stations remain aligned over long production runs. Power for the synchronous motor comes from a single-phase 120 VAC source; at this voltage, the motor burden is 2.45 VA and the clutch burden is 10.5 VA, which are suitable for standard control transformers. Power-on pull-in occurs 28 ms after excitation, and power-off dropout occurs 17 ms after the supply is removed. These short response times minimize delays when the control panel is energized or de-energized.
The output circuit is rated for a 10 A resistive load at 120 VAC, so it can switch heaters, lamps, or pilot-duty solenoids directly without an interposing relay. Under a 1 A load, the silver-alloy contacts can achieve 5,000,000 cycles. Mixed and heavier loads provide an average service life of 250,000 operations before the contacts require refurbishment. The moving system resets in 0.5 seconds, matching the dial division and supporting rapid restarts in high-throughput machines. Operation is synchronized with a 60 Hz mains frequency, allowing timers connected to the same distribution bus to track consistently. This frequency-based operation maintains coordinated timing when ambient temperature or supply voltage changes within the permitted operating range.
