Structure and functions
4
NK823x hardware
24
Building Technologies
A6V10062437_a_en
Fire Safety & Security Products
30.06.2013
DF8090 Power Supply Supervision
DF8090 is a module designed for monitoring a 12V DC power supply. It can detect the
conditions listed below, shown on the DF8090 local panel and report them to NK822x,
and in turn to management station (see the following):
Mains failure (no 220VAC)
Battery low
Power supply failure (trouble with AC/DC converter)
Battery protection fuse blown (internal micro-fuse type MSF 3.15A/250V)
1
2
PW
MAINS
AC/DC
LOW BATT
BATT FUSE
DF8090 front panel
Item
Description
1
LEDs.
2
I
2
C connector to I/O modules.
See figure
NK822x power connections (see NK822x hardware installation [➙ 37]) for
the NK822x power connections using the power supervision module.
For more information about the DF8000 Input/Output modules, including installation
details, see documents
DF8000 Datasheet (document no.A6V10081184) and DF8000
ICC (document no.A6V10081388)
4.2
NK823x hardware
The NK823x is composed of an electronic board (with optional plug-ins) installed in a
compact and robust plastic box.
Note: NK823x units with build state up to 04 are equipped with the NKM8001-A1
mainboard that do not support locally connected DF8000 I/O modules.
Instead, NK823x units with build state 10 or higher are equipped with the NKM8001-
A2 mainboard that can support up to 4 locally connected I/O modules.