User Manual

15-5
Siemens Switzerland Ltd www.siemens.com/gamma 2019
Building Technologies Division
Technical Information and Application Examples
Technical Information
System overview
System data
Bus cable
• Cable type mm
2
YCYM 2 x 2 x 0.8
One core pair (red, black) for signal transmission and power supply, one
core pair (yellow, white) for additional applications (SELV or voice)
Cable length
• Cable lengths of one line in total (core diameter: 0.8 mm) m max. 1000 (including all junctions)
• Length between two bus devices m Max. 700
• Length between bus device and power supply unit (320 mA)/choke m Max. 350
• Length between power supply unit (320 mA) and choke
Side-by-side mounting necessary
(on standard mounting rail with integrated data rail)
Bus devices
• Number of areas Max. 15
• Number of lines per area Max. 15
• Number of bus devices per line Max. 64
Topology
• Topology structure Line, star or tree structure
Power supply
• Power supply V DC 24 (SELV safety extra-low voltage)
• Power supply units per line Minimum one power supply unit (160, 320 or 640 mA or 2 x 640 mA)
Transmission
• Transmission technology Distributed, event-controlled, serial, symmetric
• Baud rate bit/s 9600
Device characteristics (unless otherwise specified)
Device properties
Degree of protection according to EN 60529 IP20
Protective measure Bus: safety extra-low voltage SELV 24 V DC
Overvoltage category III
Rated insulation voltage Ui V 250
Degree of pollution 2
EMC requirements complies with EN 50428
Resistance to climate EN50491-2
Operating conditions
Application
For fixed installation indoors, for dry rooms and installation in heavy-
current distribution boards
Ambient operating temperature °C -5 to +45
Humidity in operation % Max. 93
Storage temperature °C -25 to +70
Humidity in storage % Max. 93
Certification KNX/EIB certified
CE marking
Compliant with EMC Directive (residential and non-residential buil-
dings), Low Voltage Directive
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