1
Bus power supply 640 mA
Product code: EK-AB1-TP
• Storage temperature: - 25 ... + 55°C
• Transport temperature: - 25 ... + 70°C
• Relative humidity: 95% not condensing
Technical data
Power supply
• Voltage 230 Vac, 50/60 Hz
• Input current 0,1 A
• Power consumption 22 W (power losses < 3 W)
Outputs
• Bus line voltage: 30 Vdc +1/-2 Vdc SELV
• Rated current: 640 mA
• Buffer time: 200 ms
• Bus line connection: KNX terminal block (black/red) in-
cluded
Switching, display and connection elements
The device is equipped with a reset pushbutton, 3 LEDs
and terminal blocks for mains voltage 230 Vac and KNX
bus line.
KNX device with function of power supply for a bus line.
It has to be used in KNX installations for control of homes
and buildings.
Description
The ekinex
®
power supply EK-AB1-TP is a KNX device
for rail mounting which produces and monitors the 30 Vdc
voltage required to operate the bus system. The device
has an integrated choke which provides the decoupling
between the power supply and the information on the bus
line. On a KNX bus line can be connected up to 64 KNX
bus devices. The output is protected from overload and
short circuit. The device can support short interruptions of
the mains voltage (max 200 ms).
Functions
• 30 Vdc SELV power supply for a KNX bus line with max
64 connected devices
• Reset of the connected bus line with a dedicated pu-
shbutton
Main characteristics
• Housing in plastic material
• Mounting on 35 mm rail (according to EN 60715)
• Protection degree IP20 (according to EN 60529)
• Classification climatic 3K5 and mechanical 3M2 (accor-
ding to EN 50491-2)
• Pollution degree 2 (according to IEC 60664-1)
• Weight 150 g
• 4 modular units (1 unit = 18 mm)
• Dimensions 72 x 90 x 70 mm (WxHxD)
Environmental conditions
• Operating temperature: - 5 ... + 45°C
REAEKAB1TP
Planning
Planning a KNX bus installation, the use of a 640 mA po-
wer supply unit requires to take into account the following
guidelines:
• the maximum number of bus devices connected is 64;
• the maximum length of a line segment is 350 m, mea-
sured along the line between the power supply and the
furthest device bus;
• the maximum distance between two bus devices can-
not exceed 700 m;
• the maximum length of a bus line is 1000 m, keeping into
account all segments.
At the same bus line can be connected not more than two
power supplies. A second power supply may be necessa-
ry when the installation in distribution boards requires a
particular concentration of the bus devices (tipically more
than 30 units installed within 10 m). In this case a po-
wer supply has to be installed near the group of devices.
Between two power supplies installed on the same bus
line a minimum distance of 200 m is required, measured
along the line.
bus KNX
EK-AB1-TP
Power supply 640 mA
230 V~
50/60 Hz
I
≤ 640 mA
30 V
~
=
1
2
3
L
N
+ 45 °C
ON
I > I
max
2
5
6
1) Terminal blocks for power supply 110-230 Vac 50/60 Hz
2) Reset pushbutton
3) Reset LED (red)
4) Terminal block for KNX bus line
5) Overload/short circuit LED (red)
6) Output voltage LED (green)
DCEKAB1TP
1
3
4
Datasheet STEKAB1TP_EN
