The Omron G6RN-1 24VDC is a power relay rated for 8 A, with a 24 VDC coil. This is a standard-issue relay for general-purpose switching in control panels, PLC output isolation, and light industrial loads. The 8 A contact rating covers most signal-level and moderate power switching tasks — think solenoid valves, contactor coils, indicator lamps, and small motor starters through a contactor.
The 24 VDC coil is the most common control voltage in industrial panels, so this relay fits right into a standard 24 VDC control bus without a separate power supply. The 8 A rating is the contact current; if you are switching a load that draws close to that continuously, factor in some derating for ambient temperature above 40 °C — standard practice for any electromechanical relay.