NK822x Structure and Functions
22
Building Technologies
048_DMS_NK8000_ICC_MP4.40_A6V10062437_a_en.doc
Fire Safety & Security Products 06.2011
4.7 I
2
C interface: I/O and power supervision
This interface allows for a direct support of:
Direct digital input/output:
One or two DF8040 (CF9040) input modules
One DF8020 (CF9020) output module
Power supply supervision:
One DF8090 power supply supervision module
All modules can be installed on the DIN-rail, next to NK822x unit.
DF8020
DF8020 is a module providing 8 relay outputs, NO or NC.
DF8040
DF8040 is a module providing 8 inputs, which can be normally open or normally
closed and driven by dry contacts or open collector signals
See page 33 for more information on the connection of I/O modules to the
NK822x
DF80
90 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. 6) and re-
port 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)
Fig. 6 DF8090 front panel
See Fig. 21 on page 36 for the NK822x power connections using the power su-
pervisi
on module.
For more information about the DF8000 Input/Output modules, including instal-
lation details, see documents:
DF8000 Datasheet (document no.A6V10081184)
DF8000 ICC (document no.A6V10081388)
9
8
7
6
5
4
3
2
1
1
DF8090
PW
MAINS
C/DC
LOW
I
2
C connector
LEDs
BATT FUSE
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