S300 Expansion Enclosures CK721-A Installation and Operation
3-22 24-10349-8 Rev. B
This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2012 Johnson Controls, Inc.
Applying Power to the S300 Expansion Enclosure
The quality of the line power supplied to your system, the connection, and the
grounding of the power and data lines, must conform to your local electrical codes.
Consult with your local authorities to assure adequate installation wiring of this
S300 expansion enclosure.
Before you apply power to the S300 expansion enclosure, perform the following
procedures:
Ensure proper line voltage is available
Construct a transformer cable
Ensure proper grounding is in place
Check LEDs on the power supply
Check for proper fuses
IMPORTANT
Observe the following precautions:
If the facility is located in an area where power lines are subject to frequent
lightning strikes, verify with the electric company that the building transformer is
equipped with surge protectors. These, as well as a “crowbar” type of protection
can be installed at the main service entrance if the building transformer is not
equipped with lightning protection.
Do not connect the transformer to an AC power source until the hardware
installation is complete.
Do not connect a single transformer to multiple power supplies.
AC earth/safety ground must connect directly to the enclosure.
The S300 power supply must be powered from a dedicated 24VAC transformer.
This transformer is not to be shared by any other loads.
Circuit board assemblies interconnect to earth/safety ground through their
mounting holes. All standoffs and mounting hardware must be conductive and
connected to AC earth/safety ground. The S300 enclosure provides a
conductive mounting system that must be field- connected to AC earth/safety
ground
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