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5
Smart Relay 4 G2 Installation and Operation Manual
INSTALLATION
Installation/Operation
Power
Connect the 2.1mm barrel type center positive power connector into the unit and the
included 9 to 12 VDC power supply with domestic connector into a 120 Vac 50-60 Hz
power source.
NOTE: Never use any type of power supply other than the specified/supplied
power supply. Check the power jack on the back of the unit to determine which
power supply is required.
Surge Protection
The Smart Relay 4 G2 has built-in resistance to voltage changes; we recommend that
you use a power surge protector or line conditioner on the incoming AC line.
Lightning strikes and/or other high voltage surges may damage your Smart Relay 4 G2
and connected equipment if it is not properly protected. For lightning protection
devices, check out www.polyphaser.com and www.itwlinx.com.
UPS Standby Power System
We recommend that you connect your Smart Relay 4 G2 to a UPS standby power
system. A UPS helps minimize the risk to the Smart Relay 4 G2 and provides power
during a power outage.
Wire Prep
The Smart Relay 4 G2 interfaces to external equipment through removable euro-block
screw terminals. The terminals accommodate wire sizes from 16 - 28 AWG solid or
stranded wire. Before installing a wire, remove the euro-block screw terminal plug and
turn each capture screw fully counterclockwise. Strip each conductor to a length of
0.25” and insert the conductor fully into the terminal. Turn the capture screw fully
clockwise to secure the conductor.
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