Chapter 1: Getting Started
The SG2 PLR 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 PLR 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 PLR is open and exposed. For the open-board models, all electrical components are exposed.
For this reason, it is recommended the SG2 PLR 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 PLR should only be installed and wired by properly experienced and certified personnel.
Make sure the wiring of the SG2 PLR 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 PLR, 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 PLR operation must be shut down immediately.
4
SG2 PLR User Manual
Chapter 1: Getting Started
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