Operation - Bosch DCN Next Generation Installation & User's Instructions

DCN Next Generation | Installation and User Instructions | Installation Devices
42.4.2 Connect a power supply
You can connect an external power supply to the
external power supply socket of the fiber interface. The
fiber interface is supplied with a Kycon KPP-4P plug,
which you can connect to this socket (refer to section
41.5.2).
Caution
Make sure a diode is installed between the
external power supply and the fiber interface
(refer to figure 42.5). The system voltage
(nominally 40 V) can be higher than the external
power supply. The higher system voltage is
forced to the external power supply. The external
power supply can become defective.
The diode should be specified for at least 50 V reverse
voltage and a maximum current bigger than what can
be expected from the connected load.
Max. 48V/5A
KPP-4P
Pin 2
figure 42.5: Diode connection
Bosch Security Systems | 2007-02 | 9922 141 70525
KPP-4P
Pin 1

42.5 Operation

The two LEDs on the fiber interface give information
about the condition of the fiber interface.
table 42.3: Status LEDs
Green Yellow
(Power) (Fault)
Off Off
Off On
On On
On Off
Flash Off
Flash On
en | 237
Description
Off; no external power
available.
Stand-by; external power
to POF turned off.
Operating; external
power to POF turned on.
Operating, no external
power available, but
powered from the POF
side.
Fault, no external power
available and no protocol
received.
Fault, external power
available, but no protocol
received.