General Description - Bpt KXPS320 Manual

KXPS320-KXPS640 24808730 19-02-14_- 24/02/14 12.14 Pagina 11
The KNX power supply unit supplies the power needed by the KNX bus line devices,
generating a safety extra low voltage (SELV) of 30 Vdc.
The maximum output current is 320 mA for the KXPS320 power supply unit and 640 mA
for the KXPS640 power supply unit: the choice of supply unit depends on the maximum
current consumption of the KNX devices connected to the line. Each bus line requires at
least one power supply unit. The power supply unit integrates an internal choke to isolate
data traffic from the power supply. A special red/black terminal is used to connect it to
the bus.
The power supply unit is protected against short-circuits and has a maximum output
current limit.
The green LED (Operating status) indicates when the power supply unit is ready.
The red over-current LED indicates that there is an excessive current consumption
(l>lmax).
The RESET button resets all the devices connected to the bus.
When the button is pressed briefly, using a sharp tool, the output voltage will be
interrupted for 20 seconds.
LED KEY
During a RESET operation, the red RESET LED is ON.
Operating status
LED (green)
ON
ON
OFF
OFF
In the event of an over-current, disconnect the devices that cause the current
consumption over the maximum output threshold.
In the event of a short-circuit, disconnect the cause of the short-circuit.
Within max. 6 seconds the power supply restores the output current.

GENERAL DESCRIPTION

Functions
Over-current LED
l>lmax (red)
OFF
ON
ON
OFF
11
Normal operation
Over-current: the output
current is too high (l>lmax)
Bus line in short-circuit
Device not powered
E
N
G
L
I
S
H