Product Description:

The 84Q2A609 is an interval one-shot timer relay manufactured by Danaher and included in the Timers and Controllers series. As a control component, it produces a precise output interval after receiving an input signal, allowing sequencing or dwell functions in industrial automation. The unit is intended for panel or socket mounting and serves applications that require repeatable timing without PLC programming.

This relay accepts an input of 120 VAC at 60 Hz, and it remains functional across a line tolerance of +10% to -15%. It uses an 8-pin octal plug-in base that facilitates installation in a compatible socket. The DPDT contact set uses silver cadmium oxide for arc resistance and carries up to 10 A at 250 VAC or 10 A at 28 VDC. Programmable thumbwheels or internal selectors provide a timing range of 25.6 to 256 s with a fixed-time accuracy of ±5%. After coil de-energization, the contacts typically release within 30 ms. The device operates in interval mode, energizing its output for the selected period regardless of the input duration. Its isolated contacts allow separate circuits to be controlled without a direct electrical connection between the switched loads.

Cycle-to-cycle stability is supported by a repeat accuracy of ±1.5%, so identical commands produce nearly identical timing intervals. A minimum reset period of 100 ms prevents false retriggering when input signals chatter. The control circuit withstands line disturbances up to 600 V peak for 50 µs, reducing nuisance operation near large contactors and other inductive equipment. Continuous service is permitted from -10 to 40 °C, making the relay suitable for typical industrial control enclosures. The timing circuit can manage sequencing tasks while the DPDT contacts independently switch compatible AC or DC loads. Proper socket wiring and load selection help maintain reliable contact operation throughout repeated timing cycles.