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

functioning as a normally open contact that closes once the draft inducer motor generates sufficient negative pressure

offering a seamless fit for standardized burner mounting configurations

designed to eliminate parallax errors during manual readouts

this unit is built for durability in mechanical rooms and air handling units

Functional Devices RIB RIB2421SB Relay Dual-Voltage Versatility: Native support forThe 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