Home / Control Panels / Accessories / Option Cards / Simplex 566-523 Simplex 566-523 $663.74 Board Flex 4100U/ES 50 Amp Availability: Please Call for Lead Time Simplex 566-523 quantity Add to cart Request a Quote This product is already on your Quote Request Browse your Quote Request Factory NewBrand: Simplex FireAlarm.com Part #: 72487 Categories: Accessories, Control Panels, Option Cards Manufacturer Part #: 566-523 Tag: PR Specifications Resources Information Weight 1.00 lbs Brand Simplex Condition New Resources4100ES Service Parts List Simplex – Data Sheet