HP59A60192 by Danaher

The HP59A60192 is an electromechanical process timer developed by Danaher for its Timers and Controllers series. In automated machinery, the device establishes preset run, dwell, or purge periods so relays, heaters, or motor starters operate only for the specified duration. By combining a synchronous motor, clutch mechanism, and adjustable dial, it provides repeatable time-based sequencing without dependence on external logic resources.

The timing dial is graduated in 10-minute divisions, and its smallest selectable increment is 20 minutes, allowing coarse but clear index marks for shift-length or batch operations. A single revolution covers a maximum span of 10 hours, after which the internal cam returns to the home position. Under normal loads, the contacts are rated for 10 A at 120 VAC, and their mechanical endurance reaches 250,000 operations. Once power is applied, the magnetic coil closes the armature in 28 ms. When an external reset is issued, the mechanism clears in 0.5 seconds. Cycle-to-cycle deviation is held within ±3 minutes, which is suitable for cleaning cycles or lubrication intervals that do not demand subsecond precision. The drive motor and control circuit operate from a 120 VAC, 60 Hz supply, and wiring terminates on a 15-position terminal array that keeps power, control, and signal conductors separated.

A reverse-start clutch engages when the knob is turned counterclockwise, preventing accidental run initiation during manual adjustment. During each engagement, the clutch draws 10.5 VA, while the synchronous motor draws only 2.45 VA, keeping panel power demand low when several units operate in parallel. The mechanism and wiring block are housed in an HN383 explosion-proof cabinet, permitting installation in hazardous vapor locations without auxiliary purging hardware. With a mass of 2 lb 14 oz, the timer can mount directly on small brackets or bulkheads without additional structural reinforcement.