KMC Controls XEE-6311 - Manual

Digital Designer’s Guide
1–15
Application Note–AN0604D
Tips for connecting 24-volt power
This application note covers choosing a transformer and connecting
24 volt AC power to a KMC Controls DDC controller.
Multiple factors must be considered before choosing and connecting a
transformer to power a KMC controller. This application note provides
information to help system designers and installers make decisions about
powering controllers with transformers and then installing them correctly.
Danger
You can be killed or seriously injured if you contact live, high voltage circuits.
Disconnect AC mains and follow all local lock-out and tag-out procedures
when connecting or working on transformers.
Choosing a
transformer
Most KMC controllers require a 24-volt, AC power source for operation. The
recommend source for power is a UL listed, Class 2 transformer. When choosing a
transformer, consider the following:
◆ Mounting
◆ Primary voltage
◆ Secondary voltage
◆ Load capacity
Revision B