Caution, V power supply for ul certification – IAI America REXT User Manual
Page 5
CAUTION
24-V Power Supply for UL Certification
The 24-VDC power supply conditions for obtaining a UL certification are explained below.
• To obtain a UL certification, use a Class 2 power supply conforming to all applicable U.S. electrical wiring
regulations.
• If one Class 2 power supply cannot supply enough current, use two or more Class 2 power supplies. In
this case, wire each power supply according to the figure below (example). Also make sure the 0-V
terminals of all power supplies are connected with a common line.
Class 2
24-VDC
power
supply
Gateway
R unit
RACON
unit
Simple
absolute
R unit
RACON
unit
RPCON
unit
Simple
absolute
R unit
Simple
absolute
R unit
RACON
unit
RPCON
unit
Class 2
24-VDC
power
supply
Class 2
24-VDC
power
supply
-5-