User Manual

15-10
Siemens Switzerland Ltd www.siemens.com/gamma 2019
Building Technologies Division
Technical Information and Application Examples
Technical Information
UL standard
Explanation of UL symbols
Symbol Application
UL symbol
This is the most used UL symbol. This UL mark lines out that the products fullfill the security check. The security check
follows guidelines published by UL (UL standard).
c-UL symbol
This mark applies to products for the Canadian market. Products with this mark have been examined by UL in
accordance with Canadian safety directives, which differ in some points from the US directives.
c-UL US symbol
This symbol was introduced at the beginning of 1998. It means that the device bearing this mark complies with both UL
and Canadian regulations.
UR, c-UR and c-UR us symbol
These symbols are seldom seen by consumers as they are affixed to special components that are part of a larger system
or product. These components may have technical or design restrictions.
The Component Recognition symbol can be on a large number of products, such as switches, power supplies, printed
boards, switching devices and many other products. Products for Canada have an additional „c“.
The c UR us symbol was introduced in 1998 and means that the marked components meet both the UL and CSA regula-
tions.
The „UL listed“ symbol u is applied to devices that can be installed universally and without further instructions or any restriction of their respec-
tive applicability, e. g. contactors to UL 508, miniature circuit breakers to UL 489, energy management devices according to UL 916 ...
The „UL Recognized“ symbol U is intended for devices that may only be installed by experts as components, e. g. miniature circuit breakers to UL
1077, time switches to UL 917, SITOR fuses and so on.
KNX installation system in a UL standard installation system
1
1 1
2
3
4
5 5
6 6
4
Class 2
(SELV)
UL listed according to UL 916
Feeder protection
1
Bus power supply
2
Bus line
3
Load switch
4
Wall switch
5
Load
6
120 V
277 V/480 V
GAMMA instabus
I201_18159
KNX
5WG1 energy management devices . . . according to UL 916
The UL 916 requirements cover energy management equipment rated 600 V or less intended for installation in accordance with the National
Electrical Code NFPA 70. This primarily applies to devices for the control of electrical loads to achieve the desired use of electrical power. Such
equipment controls electrical loads by responding to sensors and actuators.
All devices that are powered by the bus voltage or by an external fewer 30 V DC and fewer 1.5 A power supply, and that are not connected to
voltages greater than 30 V AC/DC, meet the conditions the UL standard. These devices can be used as energy management equipment according
to UL 916 (energy management equipment accessories).
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