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IP Gateway KNX/BACnet N143
Length
Type
The device is configured entirely with ETS.
The configuration of the KNX communication objects automatically generates the corresponding BACnet ob-
jects. The following BACnet objects are being used:
Binary Input
Binary Output
Binary Value
Analog Input
Analog Output
Analog Value
No special knowledge about BACnet is required for the commissioning.
The KNX objects configured with ETS are automatically "translated" by the device into BACnet objects according
to the following process:
The BACnet object instance number is identical to the object number of the ETS. Objects with a 1 bit datapoint
type are translated into "binary" objects. All others become "analog" objects. The parameter "Object Mode" (IN-
PUT, OUTPUT, VALUE) completes the transformation to a BACnet object.
On BACnet the device appears as an Application Specific Controller (B-ASC) with up to 250 BACnet objects.
BACnet clients may set up to 455 BACnet change-of-value (COV) subscriptions for these 250 BACnet objects.
A common memory space is available for the administration of the COV subscriptions and priority arrays. This
resource optimization is because subscriptions are required for objects which send from KNX to BACnet whilst
priority arrays are for objects sending from BACnet to KNX.
The maximum number of possible subscriptions is 455 if no priority arrays are used.
As each priority array has a size of 64 Byte (16 priority levels of 4 Byte each), the number of possible subscrip-
tions decreases accordingly. The maximum possible number of subscriptions is displayed on the device website
once the configuration is complete.
Siemens Schweiz AG
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH 6300 Zug
Datapoint type
Description / Unit
14.068
Temperature °F (KNX value in °C)
14.058
Pressure hPa (KNX value in Pa)
14.058
Pressure Pa
14.056
Power W
14.056
Power kW (KNX value in W)
14.031
Energy J
14.031
Energy kWh (KNX value in J)
14.033
Frequency Hz
14.010
Area m²
A6V10466141 RS-AC
Siemens AG 2022
Subject to change
GAMMA instabus
Technical Product Information
June 2022
5WG1143-1AB01
http://www.siemens.com/gamma-td
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