Galaxy
Dual Reader Module
Galaxy Control Systems Dual Reader Module (DRM) is designed for use with the company’s 635 Dual Serial Interface over RS485 UTP cabling. It enables up to 64 readers to be connected without the need to run dedicated cabling from a centralized controller, which significantly reduces overall costs. The DRM accommodates a single door with a single reader, two doors each with a single reader, or a single door with two readers for in/out anti-passback operation.
https://galaxysys.com/product-6XX-SERIES-DRM-Dual-Reader-Module?id=16