DG104A3 Danaher
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The Danaher DG104A3 is part of the Timers and Controllers series and features a supply voltage of 120 VAC at 50 or 60 Hz. It supports panel or plug-in mounting and has a relay output rating of 10 Amps at 120 VAC. The device offers a reset time of 50 milliseconds and can withstand vibration up to 2.5G in the 10 to 100 Hz range.
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Product Description:
The DG104A3 timing module is manufactured by Danaher and belongs to the Timers and Controllers series. Classified as a single-function time-delay relay, it is intended for installation in panel cutouts or on octal bases and introduces a controlled pause before energizing downstream loads. In automated presses, ovens, or pump skids, this relay establishes fixed delays that keep startup currents staggered and ensure orderly machine sequencing without relying on programmable logic. Its electromechanical operation makes it suitable for applications that require a straightforward timing function without a separate controller.
The device operates from a nominal supply of 120 VAC at a mains frequency of 50/60 Hz. Under that input, its coil burden is 0.8 VA when off and 4.8 VA when on, so cabinet power distribution can accommodate the module without a large additional load. Normal line fluctuations are tolerated within +10/−15% of the rated voltage, preventing false trips during moderate sags or swells. Output switching is handled by an SPDT relay that carries 10 A at 120 VAC, allowing it to drive contactors, solenoids, or small heater loads directly. The module can be inserted through a panel or mounted on an eight-pin plug-in base, providing flexibility for different enclosure layouts. Potentiometer adjustment maintains timing within ±10% of the selected range, so repeatability is sufficient for most discrete control tasks.
Power-line interruptions lasting 20 ms or less do not reset the timing cycle, which avoids nuisance restarts when upstream contactors chatter. After voltage is first applied, the output responds within 30 ms, ensuring predictable startup behavior. If a manual or remote reset is triggered, the internal circuit clears in 50 ms, allowing the module to rearm rapidly for the next cycle. The device withstands lightning-induced or switching transients of up to 600 V peak for 50 µs, protecting its internal circuitry from high-frequency spikes. It also tolerates vibration exposure of up to 2.5 G from 10 Hz through 100 Hz, permitting installation on moving machinery without timing drift. These response characteristics support stable operation when brief supply disturbances or mechanical vibration are present.
