The GT3A-6AD24 is an 11-pin plug-in multi-function timer designed for industrial automation and control applications. It features a DPDT (double-pole double-throw) contact configuration rated at 5A, operates on 24VAC or 24VDC supply voltage, and provides dry contact triggering via momentary start signal. The timer offers 4 selectable operation modes including One Shot, On Delay, and Signal On/Off Delay functions, with 16 different time ranges spanning from 1 second to 180 hours. It includes external start, reset, and pause inputs for flexible control, along with power and output status indicating LEDs for visual feedback. The device supports both panel mount and socket mount installation options, making it suitable for retrofit applications and flexible system integration in industrial control panels, process automation, and machinery timing circuits.