Chapter 1: Getting Started 2
The SG2 tiny smart Relay is an electronic device. For safety reasons, please carefully read and follow the
paragraphs with "WARNING" or "CAUTION" symbols. They are important safety precautions to be aware of while
transporting, installing, operating, or examining the SG2 Controller.
WARNING: Personal injury may result from improper operation.
CAUTION: The SG2 smart relay may be damaged by improper operation.
Precaution for Installation
Compliance with the installation instructions and the user manual is absolutely necessary. Failure to comply
could lead to improper operation, equipment damage or in extreme cases even death, serious bodily injury or
considerable damage to property.
When installing the open-board models, insure that no wiring or foreign materials can fall into the exposed
circuits and components. Damage to equipment, fire, or considerable damage to property could result.
Always switch off power before you wire, connect, install, or remove any module.
The wiring for the SG2 smart relay is open and exposed. For the open-board models, all electrical components
are exposed. For this reason, it is recommended the SG2 smart relay be installed in an enclosure or cabinet to prevent
accidental contact or exposure to the electrical circuits and components.
Never install the product in an environment beyond the limits specified in this user manual such as high
temperature, humidity, dust, corrosive gas, vibration, etc.
Precaution for Wiring
Improper wiring and installation could lead to death, serious bodily injury or considerable damage to property.
The SG2 smart relay should only be installed and wired by properly experienced and certified personnel.
Make sure the wiring of the SG2 smart relay meets all applicable regulations and codes including local and
national standards and codes.
Be sure to properly size cables for the required current rating.
Always separate AC wiring, DC wiring with high-frequency switching cycles, and low-voltage signal wiring.
Precaution for Operation
To insure safety with the application of the SG2 smart relay, complete functional and safety testing must be
conducted. Only run the SG2 after all testing and confirming safe and proper operation is complete. Any potential
faults in the application should be included in the testing. Failure to do so could lead to improper operation,
equipment damage or in extreme cases even Death, serious bodily injury or considerable damage to property.
When the power is on, never contact the terminals, exposed conductors or electrical components. Failure to
comply could lead to improper operation, equipment damage or in extreme cases even death, serious bodily injury or
considerable damage to property.
It is strongly recommended to add safety protection such as an emergency stop and external interlock circuit in
case the SG2 smart relay operation must be shut down immediately.
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