including Luxaire and Coleman models

designed to eliminate parallax errors during manual readouts

Durable Construction: Engineered with robust materials to resist diaphragm fatigue and terminal corrosion over long service cycles

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Dual-Voltage Versatility: Native support for 12V and 24V systems reduces inventory complexity for multi-phase projects

Functional Devices RIB RIB2421SB Relay including Luxaire and Coleman modelsThe Functional Devices RIB2421SB is a heavy duty, pre packaged 20 Amp enclosed relay engineered for high demand HVACR and industrial energy management systems. This SPDT relay features a multi voltage coil that accepts 24VAC DC, 120VAC, and 208 277VAC, providing a versatile solution for varying control circuit requirements without the need for multiple stocked parts. Designed for direct BAS and lighting control, the RIB2421SB relay includes an