20320 Concept 3000 / 4000 Standard 2 Door Access Module
The 2 Door Access module is an economical two door, two card reader access module. It can control two doors with two readers, or one door with in and out readers.
20321 Concept 3000 / 4000 Cached Module
In Standard Cabinet with 1.75 Amp PSU
20322 Concept 3000 / 4000 Single Door Access Module
The One Door Access module is an economical one door, one card reader access module.
20324 Concept 3000 / 4000 Standalone 2 Door Access Module
Designed for smaller applications, yet rich in features, the Standalone Two Door Access Controller is a powerful access control solution in an economical package.
Concept 4000 Intelligent 2 Door Access Module

Coming Soon: The Intelligent 2 Door Access Module effectively combines offline stand-alone operation with enhanced feature design.

20420 Concept 4000 Intelligent 4 Door Access Module
The Intelligent 4 Door Access module has been specifically designed to meet the highest levels of system integrity and redundancy planning.
20425 Concept 4000 Reader Expansion Board
Plugs into 20420 Intelligent Four Door Controller
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