Johnson Controls VLF-500 SKU: VLF-500 $6,429.21 Quantity -+ Add to Shopping Cart Call for Lead Time Details Johnson Controls VLF-500 : Air Sampling Smoke Detector, Up to 5000 sq. ft. (500 m2) coverage, 3 changeover relays (Fire 1, Action, Fault), Contacts ra... Details Back DetailsJohnson Controls VLF-500 : Air Sampling Smoke Detector, Up to 5000 sq. ft. (500 m2) coverage, 3 changeover relays (Fire 1, Action, Fault), Contacts rated 2A @ 30 VDC (max). NO/NC Contacts