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GLOSSARY OF SYMBOLS
Risk of electrical shock
Indicates caution followed by important instructions
AC input
AC output
Requests the user to consult the manual
Indicates the unit contains a valve-regulated lead acid
battery
Recycle
DC voltage
Equipment grounding conductor
Bonded to ground
AC voltage
OFF
ON
Standby
No telecommunication connection
Locked position
Unlocked position
Contact closure signals
Serial communications
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