NK823x Structure and Functions
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Building Technologies 048_DMS_NK8000_ICC_MP4.40_A6V10062437_a_en.doc
Fire Safety & Security Products 06.2011
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 (see Fig. 10) and re-
port them to NK823x, 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)
Fig. 10 DF8090 front panel
See Fig. 21 on page 36 for the NK823x power connections using the power su-
pervisi
on module.
Locally connected DF8000 I/O modules are only supported with NK823x with
build state 10 or higher (NKM8001-A2 mainboard)
For more information about the DF8000 Input/Output modules, including instal-
lation details, see the documents:
DF8000 Datasheet (document no.A6V10081184)
DF8000 ICC (document no.A6V10081388)
9
8
7
6
5
4
3
2
1
1
DF8090
PW
MAINS
AC/DC
LOW BATT
I
2
C connector to
I/O modules
LEDs
BATT FUSE
9
8
7
6
5
4
3
2
1
1
DF8090
PW
MAINS
AC/DC
LOW BATT
BATT FUSE
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