Introduction CK721-A Installation and Operation
1-2 24-10349-8 Rev. B
This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2012 Johnson Controls, Inc.
NOTE
Notes indicate important points or exceptions to the information provided in
the main text.
IMPORTANT
Important messages remind you that certain actions, if not performed
exactly as stated, may cause damage to equipment or make your system
non-operational.
CAUTION
Caution messages indicate a potentially hazardous situation which, if
not avoided, may result in minor or moderate personal injury and/or
damage to equipment or property other than only the device itself.
KEY TERMS
NOTE
Throughout this manual, the S300-DIN modules and the S300 modules
are also referred to by their short name version. Refer to Table 1-3 for
details.
The following terms are used throughout this manual:
Advanced Encryption Standard (AES) – Encry
ption standard adopted by the U.S. government
in 2002; it supersedes DES. AES uses a symmetrical key algorithm.
CK721-A System – This is a general term that refers to a
combination of CK721-A terminals
and expansion enclosures that communicate with the P2000 system.
CK721-A – The CK721-A contains:
A 10/100Base-T Network Interface
A Hitachi SH-4 processor
System memory for storing cardholder records, system parameters, and history
A serial connection for communication with the user interface
An RS-485 connector for communication to the modules
Encryption – The process of changing data into a form
that can be read only by the intended
receiver. To decrypt the message, the receiver of the encrypted data must have the proper
decryption key (generally protected by a strong password).
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