ABB i-bus KNX Product Manual - page 16
ABB i-bus
KNX
Device Technology
14 2CDC 508 101 D0201 | VAA/S x.230.2.1
2.5.1
Display elements
Indicator LEDs are located on the front of the device.
All LEDs Output X indicate the actual state. In KNX operation the LED is off.
The response of the display elements is described in the following table:
LED
Function/operation
On:
Manual operation
Flashing:
Switchover process
Off:
KNX operation
Output
A…X
On:
Output active, control value > 0, normal operation
Flashes
slowly (1 Hz): Safety function (blocking or forced operation) active
Flashes quickly (5 Hz):
Output blocked (short-circuit or overload on the output group)
Off:
Output inactive
Fault
Every three outputs form an output group. Each output group features an LED fault.
On: Overload of at least one output of an output group
Slow flash (1 Hz): Short-circuit testing of the output group
Fast flash (5 Hz): At least one output of an output group is blocked
Off: Normal operation, no fault