Johnson Controls CK721-A User Manual

CK721-A Installation and Operation CK721-A and S300-DIN Enclosures
24-10349-8 Rev. B 2-3
This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2012 Johnson Controls, Inc.
Binary Output
The CK721-A provides a relay output for connecting to an external alarm at Binary
Out1. If the alarm relay is programmed for enabled, and the individual inputs are
programmed to activate the relay, the relay can be activated when any input point in
the system goes into alarm. The binary output can be individually programmed for
each input point, and the relay can be programmed to latch until the alarm is
acknowledged or to mimic the status of the alarm inputs. The relay will switch 2A at
24 VDC.
Setting the End-of-Line Switch
Network devices at either end of the RS485 network must be set as network
terminated devices. This is done with the use of the End-of-Line (EOL) switch. The
CK721-A module has two EOL switches, one for each RS485 connector. The
CK721-A is shipped with the EOL switches in the factory default position, which is
on (up).
RS485 A RS485 B
EOL switch
for RS485 A
EOL switch
for RS485 B
O
N
Note: Before changing the EOL position, remove the
24VDC supply power to the CK721-A and wait for the
RUN LED to go off.
The CK721-A modules follow the same rules as other terminated device. See the
figure below to determine the appropriate EOL switch setting for all CK721-A
modules in your network and set the EOL switch to the appropriate position for each
CK721-A.

Johnson Controls CK721-A Specifications

General

Brand	Johnson Controls
Model	CK721-A
Category	Controller
Language	English