Wiegand Protocol

Wiegand has been the access-control industry standard since the 1980s but lacks encryption and supervision. Modern installs use OSDP. EIG PRO retrofits Wiegand systems to OSDP whenever feasible. Wiegand Protocol should be read together with the project specifications, adopted codes, authority requirements, and referenced standards. A glossary summary explains the construction purpose but does not replace the current published document or a project-specific design review. Editions and local adoption can differ, so the design team should identify the controlling requirement before bidding or installation. For construction administration, document the requirement in drawings, specifications, submittals, RFIs, inspection records, and closeout material as appropriate. When two requirements appear to conflict, request written direction rather than selecting the less restrictive interpretation. That record helps the owner, designer, general contractor, and trade partners understand how Wiegand Protocol was applied on the actual project.