You must update your UPEI ID keycard once every 30 days at a wired access point, or your card access to buildings and doors will expire. This is a security feature of the system for lost cards not reported. Wired access points (AP) include parking gates, building entrance door readers, or any Salto reader/programmer mounted on the wall or door frame (not one on the door). If you have not updated in a while, or a change has been made to your profile, it can take up to 7 seconds during which the reader will flash, stop for a second,  and then if required, flash again as it programs the card memory. If your card expires, you must come to Security to have it manually re-activated on their programmer during normal business hours.