Data Sheet for Product

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Building Technologies Data sheet KNX bus CE1N3127en
HVAC Products 18.02.2008
Commissioning notes
Observer the following commissioning aspects to commission a KNX network as
intended.
Check the bus wiring prior to commissioning, and make sure that the bus line polarity
is not interchanged (terminals CE+ and CE–).
Important: Do not
interchange the bus line polarity.
Check the operating voltage wiring to make sure that the devices are connected to
AC 24 V or AC 230 V (as per the technical device information). Apply operating voltage
only after this check.
Check to ensure that power is supplied to the bus after applying operating voltage.
Supply via:
• DPSU Synco 700 devices set to "Decentral bus power supply = On".
• PSU Central bus power supply from power supply unit(s).
The Synco devices are factory-set to function "Clock time operation = Autonomous".
Determine the device that is to act as "Clock time master" in the KNX network, and the
devices that are to be operated as "Clock time slaves" or "Autonomous".
Important: In a KNX network, only one
device or one radio clock may
execute function "Clock time master".
The network address is composed of the area, line, and device address (A.L.D). This is
true also if no area or line coupler is used.
Begin by setting the area or line address in the couplers if area and line couplers are
installed in the KNX network.
Set the area address A (A.0.0, with A = 1…15) for each area coupler.
Set the line address L (A.L.0, with L = 1…15) for each line coupler.
Important: Synco devices assume area and line coupler addresses from the
preceding couplers. If there is no coupler, network address 0.2.D
(with D = 1…253) applies.
The device address may be used only once within a line.
Change the factory-set device address 255, as devices with this address cannot send
data. This avoids communication problems during commissioning. In normal mode,
data exchange (send and receive) with devices featuring device address 255 is not
possible.
The permissible device addresses are between 1 to 253, and addresses 150, 252 and
253 are reserved. The central communication unit OZW775 contains the factory-set
address 150. The Synco devices RMZ792 and OZW771 prefer addresses 252 and 253
for automatic address searches. Address 254 must remain reserved for service tool
OCI700.1.
See document P3127 for more information on setting the device address.
Commissioning
aspects
Wiring
KNX bus
Operating voltage
Bus power supply
Clock time master
Addressing
A
rea address
Line address
Device address