KNX rail properties

The listed properties are displayed in the Hardware and network editor > Inspector window > Properties tab when the KNX rail is selected in the Device view tab.

Note
The number of slots on the KNX rail represents the number of allowed devices on the rail.

General

Property	Description	Default Value
Name	Name of the KNX rail.	For example KNX_1
Comment	Text field for any helpful information on the KNX rail.	-

Network settings

If devices with KNX S-Mode are added to the KNX rail, it is necessary to set area and line according to the KNX addressing system. This enables parameterization of devices with KNX S-Mode in the ETS tool. If only devices with KNX PL-Link are used on the KNX rail the default values of the network settings can be left unchanged.

Property	Description	Default Value
Area ¹⁾	Area according to KNX addressing. Range: 0…15	0
Line ¹⁾	Line according to KNX addressing. Range: 0…15	2
Subnetwork address (KNX) ¹⁾	Resulting subnetwork address comprises area and line of the network settings.	0.2

Property

Description

Default Value

Area ¹⁾

Area according to KNX addressing.

Range: 0…15

Line ¹⁾

Line according to KNX addressing.

Range: 0…15

Subnetwork address (KNX) ¹⁾

Resulting subnetwork address comprises area and line of the network settings.

0.2

¹⁾ If the subsystem-specific extension KNX PL-Link (FldBusMgmt - subsystem-specific extension) of the BACnet object Field bus management object (FldBusMgmt) is enabled, you have to configure this property in the BACnet objects editor or in Web interface.

Alarming

Property	Description	Default value
Alarming	: Alarming is disabled. : Alarming is enabled. An Event Enrollment (EE) object is created.	: Alarming is disabled

Property

Description

Default value

Alarming

: Alarming is disabled.

: Alarming is enabled. An Event Enrollment (EE) object is created.

: Alarming is disabled

Bus power supply

NOTICE

Equipment damage due to parallel operation of internal and external KNX power supply

Operating internal and external KNX power supply in parallel may lead to severe damage of the automation station.

If an external power supply is used, make sure the internal KNX power supply is turned off.

NOTICE

Communications fail due to insufficient KNX power supply

Communications of the KNX rail fail if the power consumption of the connected devices with KNX PL-Link and KNX S-Mode exceeds the power supplied by the internal or external power supply.

Make sure that for devices with KNX S-Mode the correct value for power consumption is set in the Hardware and network editor > Inspector window > Properties > General tab.
Make sure the power supplied by the internal or external power supply is larger than the power consumed by the connected devices with KNX Pl-Link and KNX S-Mode.

Property text	Description	Default value
Bus power supply ¹⁾	The internal bus power supply has to be configured using one of the following settings. Manual off: Internal bus power supply is permanently off. Auto detection depending on connected devices: - If an external power supply is added to the KNX rail in ABT Pro, the internal bus power supply is switched off. - If no KNX device is added to the KNX rail in ABT Pro, the internal bus power supply is switched off. Manual on: Internal bus power supply is permanently on.	Auto detection depending on connected devices
Total power available	Total power available shows the power of the internal bus power supply of KNX rail or the power of the connected external power supply unit. The value is calculated automatically. Unit: [mA]	50
Power remaining	Power remaining shows the remaining power of the KNX rail. The value is calculated automatically, based on the power consumption of power supply modules and devices with KNX PL-Link. Power consumption of devices with KNX S-Mode is only considered if it has been defined in the properties. Unit: [mA]	50

Property text

Description

Default value

Bus power supply ¹⁾

The internal bus power supply has to be configured using one of the following settings.

Manual off: Internal bus power supply is permanently off.

Auto detection depending on connected devices:
- If an external power supply is added to the KNX rail in ABT Pro, the internal bus power supply is switched off.
- If no KNX device is added to the KNX rail in ABT Pro, the internal bus power supply is switched off.

Manual on: Internal bus power supply is permanently on.

Auto detection depending on connected devices

Total power available

Total power available shows the power of the internal bus power supply of KNX rail or the power of the connected external power supply unit.

The value is calculated automatically.

Unit: [mA]

Power remaining

Power remaining shows the remaining power of the KNX rail.

The value is calculated automatically, based on the power consumption of power supply modules and devices with KNX PL-Link. Power consumption of devices with KNX S-Mode is only considered if it has been defined in the properties.

Unit: [mA]

Internal and external power supply on KNX rails

NOTICE

Equipment damage due to parallel operation of internal and external KNX power supply

Operating internal and external KNX power supply in parallel may lead to severe damage of the automation station.

If an external power supply is used, make sure the internal KNX power supply is turned off.

Description	Value	Additional Information
Internal power supply to KNX rail DC 24 V	50 [mA]	Up to 5 devices with KNX PL-Link can be operated using internal bus power supply.
RL 125/23 Decentralized power supply 5WG1 125-4AB23	80 [mA]	Up to 64 devices with KNX PL-Link can be operated using 1 external bus power supplies. In ABT Pro only 1 external bus power supply can be engineered. See DRA installation guide CM111043 for details.
JB 125C23 Decentralized power supply 5WG1 125-4AB23	80 [mA]
N 125/22 KNX-Bus Power Supply Unit 5WG1 125-1AB02	160 [mA]
125/12 KNX-Bus Power Supply Unit N 5WG1 125-1AB12	320 [mA]
N 125/22 KNX-Bus Power Supply Unit 5WG1 125-1AB22	640 [mA]

Power consumption of devices with KNX PL-Link

Device		Value
Room operator units	QMX2.P33	10 [mA]
	QMX2.P43	10 [mA]
	QMX3.P02	8 [mA]
	QMX3.P34	10 [mA]
	QMX3.P35H	15 [mA]
	QMX3.P36F	13 [mA]
	QMX3.P37	10 [mA]
	QMX3.P38H	15 [mA]
	QMX3.P74	15 [mA]
	QMX3.P87	8 [mA]
	QMX3.P88	8 [mA]
Delta i-system	UP 221/2	9 [mA]
	UP 221/3	9 [mA]
	UP 222/2	9 [mA]
	UP 222/3	9 [mA]
	UP 223/2	9 [mA]
	UP 223/3	9 [mA]
	UP 223/5	9 [mA]
Delta style	UP285/2	9 [mA]
	UP 285/3	9 [mA]
	UP 286/2	9 [mA]
	UP 286/3	9 [mA]
	UP 287/2	9 [mA]
	UP 287/3	9 [mA]
	UP 287/5	9 [mA]
Pushbutton interface	RL 260/23 - JB 260C23	11 [mA]
Pushbutton interface	UP 220/31/21	11 [mA]
Blinds actuators	RL 521/23 - JB 521C23	10 [mA]
	RS 520/23 - JB 520C23	10 [mA]
	UP 520/3	10 [mA]
	UP 520/13	10 [mA]
HVAC actuators	GDB111.9K	5 [mA]
	GDB181.1E	5 [mA]
	GLB181.1E	5 [mA]
Dimming actuators	N 528D01	5 [mA]
	RS 525/23 - JB 525C23	10 [mA]
	UP 525/03	10 [mA]
	UP 525/13	10 [mA]
Switching actuators	RL 512/23 - JB 512C23	10 [mA]
	RL 513/23 - JB 513C23	10 [mA]
	RS 510/23 - JB 510C23	10 [mA]
	UP 510/03	10 [mA]
	UP 510/13	10 [mA]
Sensors	UP 258D11	10 [mA]
	UP 258D12	10 [mA]
	UP 258D31	12.5 [mA]
	UP 258D41	12.5 [mA]
	UP 258D51	30 [mA]
	UP 258D61	20 [mA]
	UP 255D21	10 [mA]
	QMX3.P30	8 [mA]
	QMX3.P40	8 [mA]
	QMX3.P70	15 [mA]
	AQR2570/2530	10 [mA]
	AQR2570/2532	10 [mA]
	AQR2570/2533	10 [mA]
	AQR2570/2535	10 [mA]
	AQR2576/2530	15 [mA]
	AQR2576/2532	15 [mA]
	AQR2576/2533	15 [mA]
	AQR2576/2535	15 [mA]
	AQR2576/2535Q	15 [mA]
I/O blocks	RXM21.1	5 [mA] Including connected field devices.
I/O blocks	RXM39.1	5 [mA] Including connected field devices.