Johnson Controls CK721-A User Manual

24-10349-8 Rev. B 2-1
Chapter
2
This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2012 Johnson Controls, Inc.
CK721-A AND S300-DIN ENCLOSURES
This chapter describes the equipment used with the CK721-A.
CK721-A
This section describes components of the CK721-A. Picture of the module is followed by a
detailed description of the components.
The major functional components of the CK721-A are:
 Embedded 32-bit processor
 128 MB onboard flash memory (for the operating system and database)
 3V lithium battery
 IN1 and IN2 - Binary inputs, unsupervised
 Binary output - Form C Relay, SPDT, 24 VDC maximum
 LED indicators (POWER, FAULT, RS485 A, RS485 B, ETHERNET, 10/LINK,
100/LINK, and RUN)
 Connectors:
RS232 A - RS-232 Serial Interface, DB9 port for the user interface to Workstations
or laptop computers
RS232 B - Dual use: Transaction logger port or KONE elevator controller
communications port
RS485A - OTIS BMS elevator communication
RS485B - For field device communication
RJ45 - 10/100Base-T network port for host communication
USB - Not used

Johnson Controls CK721-A Specifications

General

Brand	Johnson Controls
Model	CK721-A
Category	Controller
Language	English