Download CRC Technical Reference Manual

Introduction
Introduction to the CRC
The Card Reader Controller (CRC) is shown in Figure 1-1. The
CRC interfaces card readers and door locks to an integrated
system (fire, security, and access control) allowing access to a
protected area only when a cardholder presents a valid access
card, and has access privileges for that area. The intelligence for
controlling access is programmed into the CRC.
Figure 1-1: Card Reader Controller
CRCs are connected by a dedicated RS-485 circuit, called a
SAC bus. The SAC bus allows the CRC to communicate with a
control panel. The control panel can support an integrated
security, access control, and fire alarm system.
Model CRCXM is a version of the CRC with expanded memory
capacity. It has the same physical and functional attributes as the
CRC, but can store a larger database of cardholder and history
records.
For specifications please refer to the installation sheet CRC
CRCXM Card Reader Controller, P/N 387625.
CRC Technical Reference Manual
Technical Manuals Online! - http://www.tech-man.com
1.3