Module Introduction The WIEGAND Protocol is about the Standard Protocol of the Access Control, which is formulated by the Access Control Stardard Subcommittee of the SIA(Security Industry Association). It is the Protocol which is about the Non-contact IC Reader and Writer Interface and Output. This protocol defines the Interface between the Card Reader and the Controller, which is usually applied in the Access Control, Safety and other relative Industrial Area. This Standard makes the work which is done by the designers of the Card Reader and the manufacturers of the Controller standardized. Application Field It is applied in the Interface between the Card Reader and the Controller of the Access Control, Safety and other relative Industrial Area. 【DOWNLOAD】