What applications is the 1 5/8" bore size most common for

ensuring the internal windings and Class F insulation are protected from debris and moisture in harsh mechanical rooms

Integrated Tool Port: Simplifies field servicing by providing a direct access point for commissioning tools and diagnostic equipment

and 6" stainless steel paddles

Functional Devices RIBMNLB-4 Board L99H008 What applications is the 1The Functional Devices RIBMNLB 4 logic board is a field proven AHU fan safety alarm circuit designed to aggregate multiple shutdown signals into a single supervisory point. This 4 input logic module eliminates the need for complex, hand wired relay interlocking by using high density 2. 75 inch track mount housing. Optimized for 24Vac dc power input, the board accepts up to four normally closed (N C) inputstypically from smoke detectors, freeze stats,